®
™
P R O D U C T
G U I D E
H A V E Q U E S T I O N S ? N E E D A N S W E R S F A S T ?
FOR ARCHITECTS / DESIGN PROFESSIONALS
Our Architectural Design Department can assist you with
specif ic questions regarding architectural glass products,
design considerations, and specif ication writ ing.
FOR GLAZING CONTRACTORS
Our Sa les and Technica l Serv ices Depar tments wi l l
prov ide answers to your quest ions . Whether you need
help wi th cost ing , ach iev ing technica l per formance
goals , or understanding lead t imes, we are here to help.
P lease emai l or ca l l :
g lass@vi racon.com / / 800.533.2080
viracon.com
800 Park Dr ive, Owatonna, MN 55060
800.533.2080
Fol low us on:
H A R I M G R O U P H E A D Q U A R T E R S ( C O V E R )
LOCATION: SEOUL, SOUTH KOREA
GLASS TYPE: VRE1-46, VE1-2M, VE24-2M, RoomSideTM Low-E
ARCHITECT: THE BECK GROUP
GLAZING CONTRACTOR: WALLINK INTERNATIONAL LTD.
PHOTOGRAPHER: © WALLINK INTERNATIONAL LTD.
B R I D G E P O I N T A C T I V E H E A L T H C A R E
LOCATION: TORONTO, ONTARIO, CANADA
GLASS TYPE: VRE15-38, VNE15-63 (PODIUM)
ARCHITECT: STANTEC ARCHITECTURE (PDC) ; KPMB ARCHITECTS (PDC) ;
HDR ARCHITECTURE (DBFM); DIAMOND SCHMITT ARCHITECTS (DBFM)
GLAZING CONTRACTOR: SOTA GLAZING INC. ; TAGG INDUSTRIES (PODIUM)
PHOTOGRAPHER: © TOM ARBAN
001 I N T R O D U C T I O N
002 C O M P O N E N T S & E N H A N C E M E N T S
006 V I R A C O N N O M E N C L A T U R E
007 G L A S S S U B S T R A T E S
010 H I G H P E R F O R M A N C E C O A T I N G S
014 R O O M S I D E ™ L O W - E
016 S P A N D R E L G L A S S
020 S I L K - S C R E E N
022 S I L K - S C R E E N P A T T E R N S
030 D I G I T A L D I S T I N C T I O N S ™
034 H E A T T R E A T M E N T
036 H O L E S
039 N O T C H E S
040 E D G E W O R K
042 S H A P E S & P A T T E R N C U T S
046 I N S U L A T I N G
050 P R O D U C T O V E R V I E W
051 P R O D U C T C O M P O N E N T S
052 S T A N D A R D I N S U L A T I N G G L A S S
053 I N S U L A T I N G L A M I N A T E D
056 L A M I N A T E D I N S U L A T I N G
058 D O U B L E L A M I N A T E D I N S U L A T I N G
060 T R I P L E I N S U L A T I N G
062 C L E A R P O I N T ™
064 S P A C E R S
069 S I L I C O N E
070 S P A C E R F I L L
072 S I Z E S
076 L A M I N A T E D
080 P R O D U C T O V E R V I E W
081 C Y B E R S H I E L D ™
082 I N T E R L A Y E R S
083 V A N C E V A ® C O L O R
084 A P P L I C A T I O N S
086 S I Z E S
088 M O N O L I T H I C
092 P R O D U C T O V E R V I E W
093 S I Z E S
094 R E S O U R C E S
098 P E R F O R M A N C E D A T A
099 G L A S S S A M P L E S
099 E D U C A T I O N A L R E S O U R C E S
100 G L A S S S P E C I F I C A T I O N
116 Q U A L I T Y S T A N D A R D S
120 G L A Z I N G G U I D E L I N E S
123 G L O S S A R Y
128 W A R R A N T Y
129 T R A D E M A R K S & P A T E N T S
130 P H O T O G R A P H Y I N D E X
CONTENTS
Thank you very much for your interest in Viracon’s architectural glass products and services.
We hope you find this product guide to be a helpful resource.
At Viracon, we strive to set the industry standard for finished product quality in the widest
variety of customizable options that you can find in North America. We package our products
with extremely deep technical expertise derived from our work on many of the world’s most
distinctive commercial buildings over the last several decades. Our unique position as both
a glass coatings and glass fabrication leader reduces your risk, greatly increases your design
flexibility, and allows glass products and services sourced from Viracon to be visibly better.
We would be very grateful for the opportunity to support you on your next project. Please
call your local Viracon glass expert or contact one of our architectural design staff at
800.533.2080 to learn more.
Warm regards,
Kelly Schuller
President
L E T T E R T O O U R V A L U E D P A R T N E R S
5 3 5 M I S S I O N
LOCATION: SAN FRANCISCO, CALIFORNIA
GLASS TYPE: VRE1-54
ARCHITECT: HOK
GLAZING CONTRACTOR: ARCHITECTURAL GLASS & ALUMINUM
PHOTOGRAPHER: © GREG WEST
G R E A T B U I L D I N G S D E S E R V E G R E A T G L A S S .
Architects and glazing contractors throughout the world turn to
Viracon every day for innovative design solutions, proven products,
professional services, and trusted advice. For more than 40 years
we’ve built a reputation as a single source architectural glass
fabricator you can rely on. From imaginative aesthetics to strict
performance requirements and critical budget demands, Viracon
can help you meet your project objectives. Our success is the
direct result of our customers’ success and is proudly reflected in
the many great buildings Viracon has been part of.
The extraordinary vision you embrace for each of your projects
deserves only the highest quality of architectural glass
available. Our commitment to provide glass solutions within
budget and on time ensures you will successfully meet and
exceed your clients’ needs.
MISSION STATEMENT
We deliver the highest quality, widest variety of customized
architectural glass solutions for the creation of distinctive
commercial buildings around the world.
ABOUT VIRACON
Viracon is based in Owatonna, Minnesota and has facilities in
Statesboro, Georgia, St. George, Utah, and Nazaré Paulista, Brazil.
All four facilities fabricate high-performance glass products as an
international company of Apogee Enterprises, Inc. Apogee is a
leading fabricator, distributor and installer of value-added glass
products and systems. Headquartered in Minneapolis, the Apogee
stock is traded on NASDAQ under the symbol APOG.
E I G H T H A N D M A I N
LOCATION: BOISE, IDAHO
GLASS TYPE: VE6-42, VE1-42
ARCHITECT: CTA ARCHITECTS ENGINEERS (ARCHITECT OF RECORD) ;
BABco*ck DESIGN GROUP (DESIGN ARCHITECT)
GLAZING CONTRACTOR: D&A GLASS COMPANY, INC. ;
WAUSAU WINDOW AND WALL
PHOTOGRAPHER: © MARC WALTERS
COMPONE N H A N C
E N T S &EMENTS
VIRACON // 005
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H O W T O T U R N O R D I N A R Y G L A S S I N T O E X T R A O R D I N A R Y G L A S S .
006 VIRACON NOMENCLATURE
007 GLASS SUBSTRATES
010 HIGH PERFORMANCE COATINGS
014 ROOMSIDETM LOW-E
016 SPANDREL GLASS
020 SILK-SCREEN
022 SILK-SCREEN PATTERNS
030 DIGITALDISTINCTIONS
034 HEAT TREATMENT
036 HOLES
039 NOTCHES
040 EDGEWORK
042 SHAPES & PATTERN CUTS
COMPONENTS & ENHANCEMENTS HIGHLIGHTS
C A R P E N T E R S U N I O N I N T E R N A T I O N A L T R A I N I N G
C E N T E R ( I T C ) P H A S E V ( P R E V I O U S )
LOCATION: LAS VEGAS, NEVADA
GLASS TYPE: VNE24-63
ARCHITECT: CARLILE COATSWORTH ARCHITECTS
GLAZING CONTRACTOR: QUANTUM GLASS & MIRROR
PHOTOGRAPHER: © COURTESY CARLILE COATSWORTH ARCHITECTS; RMA PHOTOGRAPHY
T H E R E S I D E N C E S A T C I T Y C E N T E R
LOCATION: WASHINGTON, D.C.
GLASS TYPE: VE1-2M, VE3-2M
ARCHITECT: FOSTER + PARTNERS
GLAZING CONTRACTOR: HARMON, INC.
PHOTOGRAPHER: © ANNE GUMMERSON
006 VIRACON // COMPONENTS & ENHANCEMENTS
V I R A C O N N O M E N C L A T U R E
V I R A C O N N O M E N C L A T U R E
Viracon utilizes an alphanumeric code for each coated glass product. The code designates the coating as well as the glass
substrate the coating is applied to. This nomenclature is meant to aid in specifying our fabricated glass products however
it is not enough on its own to clearly identify the full glass unit. In a specification, it is important to include the Viracon
nomenclature along with an outline including each component of the glass unit.
The first portion of the code represents the coating family. Within each family, the coatings available have varying degrees
of light transmittance. In our nomenclature, this is represented by the number following the dash.
The number between the Viracon coating family and the nominal light transmittance of the coating is the outboard glass color
that the coating is applied to. In this example, VE-85 is the coating and VE1-85 is the VE-85 coating applied to clear glass.
EXAMPLE SPECIFICATION1. 1” VE1-85 Insulating Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: 1/4” Clear Heat Strengthened
b. Coating: VE-85 on #2 Surface
c. Space: 1/2” aluminum, black, air filled
d. Silicone: black
e. Interior Glass Ply: 1/4” Clear Heat Strengthened
2. Performance Requirements
a. Visible Light Transmittance: 76%
b. Exterior (Vis-Out) Reflectance: 12%
c. Winter U-Value: 0.31
d. Summer U-Value: 0.29
e. Shading Coefficient: 0.63
f. Solar Heat Gain Coefficient: 0.54
g. Light to Solar Gain Ratio: 1.41
Coating Type Outboard Glass Substrate
Transmittance of Coating
VE 1 85-
Reference 08 80 00 Recommended Specification on pages 100-114.
VIRACON // 007
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SG L A S S S U B S T R A T E S
GLASS SUBSTRATE THICKNESSAll glass substrates are available 1/4” (6mm)
thick. Clear and each of the low iron substrates
are also available in thicknesses of 3/16” (5mm),
5/16” (8mm), 3/8” (10mm) and 1/2 (12mm). For
tinted substrates, specialty substrates or other
thicknesses of clear or low iron glass substrates,
please check with Viracon for availability.
G L A S S S U B S T R A T E S
Glass substrates are the individual plies of glass used to fabricate
glass units and may also be referred to as float glass, raw glass or
glass lites. Glass substrate options include clear, tinted and low iron.
Clear is the most commonly specified glass substrate and has a
slight green tint. In applications where designers wish to reduce the
green tint, low iron glass is often specified in place of clear glass.
Low iron is a type of float glass manufactured with less iron than
standard clear glass. With this reduction in iron content, the green
hue is reduced.
Tinted glass is available in an assortment of colors and light
transmission levels. In addition to providing a specific appearance,
tinted glass has the added benefit of improving performance.
Viracon’s glass substrate offering includes clear glass, two low iron
glass substrates and a variety of tinted glass options. Each substrate
is available in a variety of thicknesses and can have Viracon’s
reflective or Low-E coatings applied.
Viracon also offers a few specialty glass substrates which have been
developed for limited use in specific applications. Due to their unique
characteristics, specialty glass substrates cannot be combined with
Viracon’s reflective or Low-E coatings.
The specific glass substrate needed for a given project is typically
dictated by a required solar performance or a desired appearance.
A V A I L A B L E C O L O R S
13=Starphire®glass (low iron)
19=CrystalGray™
24=Optiwhite™(low iron)
26=Solarblue™ glass
27=Pacifica™ glass
29=Graphite
VIRACON // 007
1=Clear 2=Green 3=Gray
4=Bronze 6=Blue Green 7=Azuria™ glass
8=EverGreen™
30=Optigray®glass
008 VIRACON // COMPONENTS & ENHANCEMENTS
G L A S S S U B S T R A T E S
S P E C I A L T Y G L A S S S U B S T R A T E S
Viracon’s specialty glass substrates are not available with a Viracon coating applied, so they are not given a numerical code.
When specifying a specialty glass substrate, the full substrate name should be included in the specification. Contact Viracon
for more information about these specialty glass substrates.
V E L O U R A C I D E T C H E D G L A S S
For a translucent appearance in an application where solar performance requirements are minimal, Viracon offers an acid
etched glass substrate. This specialty substrate has a single acid etched surface which can be used for interior or exterior
applications. Velour acid etched glass cannot be used in a glass unit with a coating. Viracon offers a simulated acid-etched
glass for applications where a reflective or Low-E coating is desired.
O P T I V I E W A N T I - R E F L E C T I V E G L A S S
This specialty glass substrate has 5% exterior reflectance. When compared to clear glass with 8% exterior reflectance,
OptiView is a practical choice for retail storefronts or other applications where minimizing exterior reflectance is a
necessity. OptiView can also be laminated with the anti-reflective surfaces facing outward to provide a glass unit with 2%
exterior and 2% interior reflectance.
LOCATION: ORLANDO, FLORIDA / / GLASS TYPE: VRE26-38 / / ARCHITECT: LITTLE DIVERSIFIED ARCHITECTURAL CONSULTING
GLAZING CONTRACTOR: KELLEY & SON GLASS SERVICE / / PHOTOGRAPHER: © BEN TANNER
C O N N E X T I O N S
VIRACON // 009
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G L A S S S U B S T R A T E L O C A T I O N
I N S U L A T I N G G L A S S In units with multiple glass plies, it
is important to specify the specific
glass substrate for each ply. When
a tinted glass substrate is selected,
typically only one ply of the fabricated
glass unit is tinted while the other ply
remains clear. The tinted ply should
be placed to the exterior to reduce
solar heat gain.
L A M I N A T E D G L A S S
One exception is laminated glass.
Since there is no airspace to keep
the heat absorbed by the tinted
exterior ply from re-radiating into
the building, the solar heat gain can
be improved by moving the tinted ply
to the inboard. This improvement
happens when the clear coated
outboard with high solar reflectance
is placed in front of the tinted glass.
1" VRE2-54 INSULATING
1/4" (6mm) green with VRE-54 #21/2" (13.2mm) airspace
1/4" (6mm) clear
VLT 40%Winter u-value 0.30Summer u-value 0.27SHGC 0.24
1" VRE1-54/GREEN INSULATING
1/4” (6mm) clear with VRE-54 #21/2” (13.2mm) airspace
1/4” (6mm) green
VLT 40%Winter u-value 0.30Summer u-value 0.27SHGC 0.29
9/16" VLE2-70 LAMINATED
1/4" (6mm) green with VLE-70 #2.060” clear PVB
1/4" (6mm) clear
VLT 57%Winter u-value 0.96Summer u-value 0.87SHGC 0.44
9/16" VLE1-70/GREEN LAMINATED
1/4” (6mm) clear with VLE-70 #2.060” clear PVB
1/4” (6mm) green
VLT 57%Winter u-value 0.96Summer u-value 0.87SHGC 0.37
VRE-54 #2
VLE-70 #2
VRE-54 #2
VLE-70 #2
G L A S S S U B S T R A T E S
010 VIRACON // COMPONENTS & ENHANCEMENTS
H I G H P E R F O R M A N C E C O A T I N G S
H I G H P E R F O R M A N C E C O AT I N G S
S U R F A C E D E S I G N A T I O N
When describing glass products there are industry standard recommended surface designations. Each ply of glass has two
surfaces. The surface to the exterior of the building is referred to as surface #1, the back of this glass ply is surface #2. For
glass units with multiple glass plies, there could be 6 or more surfaces.
C O A T I N G L O C A T I O N
For cooling dominated buildings, the best solar performance is achieved when the coating is applied to the #2 surface,
therefore Viracon coatings are located on the #2 surface.
Coatings are thin layers of metal applied to glass to improve solar performance. The first coatings utilized on building
facades were reflective coatings which provide a mirror-like appearance and reduce solar heat gain by reflecting the sun’s
energy away from the building.
Today, the most popular coatings applied to glass are low-emissivity (Low-E) coatings. Coatings with low-emissivity properties
have low heat transfer properties and offer higher light transmission than traditional reflective coatings.
Viracon offers a broad selection of both reflective and Low-E coatings. Our coatings can be applied to clear or tinted glass substrates.
In addition, a silk-screen pattern can be applied to the same surface as the coating for excellent solar performance and appearance.
The specific coating needed for a given project is typically dictated by a required solar performance or a desired appearance.
#2
#1 #4
#5
#3
#6#2
#1 #4
#5
#3
#6
INSULATING LAMINATED
TRIPLEINSULATING
INSULATING
#2
#1#4
#3
Low-E
VE VRE VUE VNE VLE VS VP
852M484542
59544638
65 504030
6353
7057514739
081420
1318
Coating Type
Viracon CoatingFamily
Nominal lighttransmittance
available withineach family
22
012 VIRACON // COMPONENTS & ENHANCEMENTS
H I G H P E R F O R M A N C E C O A T I N G S
C O A T I N G A V A I L A B I L I T Y B Y P R O D U C T C O N F I G U R A T I O N
Configurations
1/4"Monolithic
9/16"Laminated
1"Insulating
1-5/16”InsulatingLaminated
1-5/16” Laminated Insulating
1-3/4” TripleInsulating
1-5/8” DoubleLaminated Insulating
Coatings (Coating #2) (Coating #4) (Coating #2) (Coating #4)
VE-42 YES YES YES YES YES YES YES YES
VE-45 YES YES YES
VE-48 YES YES YES YES YES YES YES YES
VE-2M YES YES YES YES YES
VE-85 YES YES YES YES YES YES YES YES
VLE-39 YES YES YES
VLE-47 YES YES YES
VLE-51 YES YES YES
VLE-57 YES YES YES
VLE-70 YES YES YES
VNE-53 YES YES YES YES YES
VNE-63 YES YES YES YES YES
VRE-38 YES YES YES YES YES
VRE-46 YES YES YES YES YES
VRE-54 YES YES YES YES YES
VRE-59 YES YES YES YES YES
VRE-65 YES YES YES YES YES
VP-13 YES YES YES YES YES YES YES YES YES
VP-18 YES YES YES YES YES YES YES YES YES
VP-22 YES YES YES YES YES YES YES YES YES
VS-08 YES YES YES YES YES YES YES YES YES
VS-14 YES YES YES YES YES YES YES YES YES
VS-20 YES YES YES YES YES YES YES YES YES
VUE-30 YES YES YES YES YES
VUE-40 YES YES YES YES YES
VUE-50 YES YES YES YES YES
All laminated glass shown above uses a PVB interlayer, see Coating Availabili ty for Laminated Configuration for interlayers other than PVB. Refer to page 006 for Viracon
Nomenclature information.
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VIRACON // 013
H I G H P E R F O R M A N C E C O A T I N G S
Coating Availability for Laminated Configuration with an Interlayer other than PVB
Saflex® SilentGlass
Acoustic SentryGlas® StormGuard® Saflex® StormVanceva®
Color*Coatings
VE-42 YES YES YES YES
VE-45
VE-48 YES YES YES YES
VE-2M
VE-85 YES YES YES
VLE-39 YES YES YES
VLE-47 YES YES YES
VLE-51 YES YES YES
VLE-57 YES YES YES
VLE-70 YES YES YES
VNE-53
VNE-63
VRE-38
VRE-46
VRE-54
VRE-59
VRE-65
VP-13 YES YES YES YES
VP-18 YES YES YES YES
VP-22 YES YES YES YES
VS-08 YES YES YES YES
VS-14 YES YES YES YES
VS-20 YES YES YES YES
VUE-30
VUE-40
VUE-50
C O AT I N G A V A I L A B I L I T Y F O R L A M I N AT E D C O N F I G U R AT I O N
*Due to coating and Vanceva Color base interlayer properties, a clear PVB interlayer must be placed between the coating and the colored interlayer.
VIRACON // COMPONENTS & ENHANCEMENTS014
R O O M S I D E ™ L O W - E
R O O M S I D E ™ L O W - E
I N T E R I O R S U R F A C E C O A T I N G
Viracon’s RoomSide™ Low-E is an interior surface coating designed to improve the u-value of an insulating or laminated
glass unit. The coating works by reflecting indoor heat back into the room and improving thermal efficiency.
The RoomSide Low-E coating is supplied to the interior surface side of the glass unit; number 4 surface of an insulating or
laminated glass unit and number 6 surface of an insulating laminated, laminated insulating or triple insulating glass unit.
LOCATION: MIAMI BEACH, FLORIDA / / GLASS TYPE: VE1-42, ROOMSIDETM LOW-E
ARCHITECT: FOSTER + PARTNERS; REVUELTA (COLLABORATING ARCHITECT) ; REM KOOLHAAS (SAXONY RENOVATION DESIGN ARCHITECT)
GLAZING CONTRACTOR: PERMASTEELISA NORTH AMERICA CORP. / / PHOTOGRAPHER: © JOHN BRICE
F A E N A H O U S E
S A X O N Y H O T E L ( R E N O V A T I O N )
INSULATING GLASS
Coating #2
RoomSideTM
Low-E #4
LAMINATED GLASS
Coating #2
RoomSideTM
Low-E #4
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VIRACON // 015
R O O M S I D E ™ L O W - E
1" VUE1-50 INSULATING
1/4" (6mm) clear with VUE-50 #21/2" (13.2mm) Argon filled space
1/4" (6mm) clear
1" VUE1-50 INSULATING WITH ROOMSIDE™ LOW-E
1/4" (6mm) clear with VUE-50 #21/2" (13.2mm) Argon filled space
1/4" (6mm) clear with RoomSideTM Low-E #4
1 3/4" VUE1-50 TRIPLE INSULATING
1/4" (6mm) clear with VUE-50 #21/2" (13.2mm) Argon filled space
1/4" (6mm) clear1/2” (13.2mm) Argon filled space
1/4” (6mm) clear
VLT 48%Winter u-value 0.25Summer u-value 0.20SHGC 0.25
VLT 48%Winter u-value 0.20Summer u-value 0.17SHGC 0.24
VLT 43%Winter u-value 0.18Summer u-value 0.17SHGC 0.22
An insulating glass unit consisting of a RoomSide Low-E coating on the number 4 surface in combination with a high
performance coating on the number 2 surface and an argon fill can offer comparable u-value performance to a triple insulating
unit without the additional expense.
RoomSideTM
Low-E #4
VUE-50 #2 VUE-50 #2 VUE-50 #2
LOCATION: SCOTTSDALE, ARIZONA
GLASS TYPE: VUE1-30, VUE1-50
ARCHITECT: BUTLER DESIGN GROUP
GLAZING CONTRACTOR: KOVACH INC.
PHOTOGRAPHER: © COURTESY ASU
S K Y S O N G 3
A S U S C O T T S D A L E
I N N O V A T I O N C E N T E R
016 VIRACON // COMPONENTS & ENHANCEMENTS
S P A N D R E L G L A S S
S P A N D R E L G L A S S
Spandrel is the panel(s) of a wall located between vision areas of windows, which conceal structural columns, floors and shear walls.
For spandrel applications Viracon offers ViraspanTM, a factory-applied, fire-fused ceramic frit paint for use with monolithic or
insulating glass and in some laminated glass configurations.
A high performance coating on the #2 surface of the laminate is required for units composed with full coverage Viraspan on
the #4 surface.
Viracon uses only lead free ceramic frit paints, which are environmentally friendly. A proven performer, Viraspan ceramic frit
paints are the product of choice for color consistency, durability, cost control and long life.
V I R A S P A N ™ O P A Q U E C E R A M I C F R I T C O L O R S A V A I L A B L E
HIGH-O
PACITY W
HITE V
175
EVERGREEN V902
BLACK V907
DARK GRAY V
901
SUBDUED GRAY V
903
GRAY V908
WARM
GRAY V
933
MEDIU
M G
RAY V948
DARK BRONZE V
900
BRONZE V904
SUBDUED BRONZE V
905
BLUE V911
H U B G R O U P C O R P O R A T E
H E A D Q U A R T E R S
LOCATION: OAK BROOK, ILL INOIS
GLASS TYPE: VNE1-63, SPANDREL
ARCHITECT: SOLOMON CORDWELL BUENZ
GLAZING CONTRACTOR: HARMON, INC.
PHOTOGRAPHER: © HARMON, THYRA NELSON
The above colors are for comparison purposes only. Actual samples should be viewed for final product selection.
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VIRACON // 017
VISION GLASS
INSULATION
VISION GLASS
SPANDRELGLASS
AIRSPACE(1” MIN)
S P A N D R E L G L A S S
Spandrel Glass is not for vision wall areas
Viracon’s ceramic frit spandrel glass products are to be glazed against a
uniform, opaque background. We do not recommend that they be used in any
application where they can be viewed with daylight or artificial light on the
opposite side such as interior partitions, mechanical rooms, screen walls or
glazing in a parking garage.
Glass by its nature is highly transparent and it is impossible to make it
uniformly opaque. The application of the ceramic frit to the glass surface
is achieved by conveying the glass under a rubber application roller. The
application of the frit to the glass surface results in striations from the roll
that are highly visible when viewing the glass in transmission (with light on
the opposite side).
S P A N D R E L G L A S S
A P P L I C A T I O N S
The proper application for ceramic fritted
spandrel glass is to install it in an opening that
has a uniformly colored insulation or back-pan
that eliminates the possibility of read-through
or viewing the glass in transmission. When
done properly, the glass may only be viewed
from the exterior of the building, with daylight
reflecting from the glass surface.
018 VIRACON // COMPONENTS & ENHANCEMENTS
S P A N D R E L G L A S S
S P A N D R E L G L A S S P E R F O R M A N C E
Winter and summer u-values are the performance values available for spandrel glazing. The u-values for spandrel glazing are
the same as the corresponding vision unit. Ceramic frit does not affect u-value performance.
1" VE1-48 INSULATING
1/4" (6mm) clear with VE-48 #21/2" (13.2mm) airspace
1/4" (6mm) clear
1" VE1-48 INSULATING SPANDREL
1/4" (6mm) clear with VE-48 #21/2" (13.2mm) airspace
1/4" (6mm) clear with ViraspanTM V903 #4
VLT 47%Winter u-value 0.31Summer u-value 0.29SHGC 0.37
Winter u-value 0.31Summer u-value 0.29
VE-48 #2VE-48 #2
VIRASPANTM V903 #4
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VIRACON // 019
M A T C H I N G S P A N D R E L A N D V I S I O N A R E A S
Often a project may require spandrel glass to harmonize with the vision areas of your building. However, this is sometimes difficult
to achieve when high-light transmitting or low-reflective glass types are used. Low-light transmitting and high-reflective glass
types provide the least contrast between vision and spandrel areas. Variable sky conditions can also influence our perception. On
a bright, sunny day, the exterior light intensity is approximately 50 to 100 times greater than the interior lighting level.
When viewing the glass from the outside, the dominant visual characteristic is the exterior reflection. On gray, overcast days, a
greater visual disparity is created between vision and spandrel areas due to the transparency of the vision glass and the perception
of depth created by interior lighting. The non-vision areas tend to look flat and two-dimensional by contrast. By keeping the vision
and spandrel glass construction similar (the same exterior glass color, coating, etc.) the contrast can be minimized under various
lighting conditions. Viracon recommends using a neutral colored ceramic frit on the fourth (#4) surface.
Viracon recommends viewing glass samples or full-size mockups to match vision and spandrel glass areas when the visible
light transmission of the vision glass exceeds 14 percent.
M O I R É P A T T E R N
Moiré is an optical phenomenon that typically appears as a wavy, rippled
or circular pattern. It is formed when two regularly spaced, non-aligned
patterns overlap. When using spandrel glass, moiré can occur when a
pattern’s shadow is cast against the spandrel glass. The moiré pattern is
not a defect in the glass or spandrel process, but rather a pattern formed
by the eye. For additional information, please review Viracon’s Ceramic
Frit and Ink Visual Characteristics Tech Talk.
B B V A C O M P A S S P L A Z A
LOCATION: HOUSTON, TEXAS
GLASS TYPE: VRE1-46, VNE24-63, VNE1-63, SPANDREL
ARCHITECT: HKS, INC.
GLAZING CONTRACTOR: JAMCO
PHOTOGRAPHER: © VIRACON, HANNAH HEMBY (PGP)
S P A N D R E L G L A S S
020 VIRACON // COMPONENTS & ENHANCEMENTS
S I L K - S C R E E N
S I L K - S C R E E N
Silk-screening ceramic frit onto glass lets a designer create a subtle or bold look for a building-using patterns and color. Silk-screened
glass improves solar control performance and can be combined with clear or tinted glass substrates, as well as with high-performance
coatings to reduce glare and decrease solar transmission.
The first step in silk-screening involves washing the annealed glass. Then, the ceramic frit paint is applied to one side of the glass.
Next, it is fired within a tempering furnace and the frit is permanently bonded to the glass. The glass must be heat strengthened or fully
tempered to prevent glass breakage due to thermal stresses under sunlit applications.
When designing with silk-screen patterns, it is important to select the pattern (screen), select the color for the pattern and identify the
pattern orientation
SILK-SCREEN #2
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VIRACON // 021
S I L K - S C R E E N
LOCATION: SEATTLE, WASHINGTON // GLASS TYPE: VE1-2M, CUSTOM SILK-SCREEN // ARCHITECT: LMN ARCHITECTS
GLAZING CONTRACTOR: ALL NEW GLASS INC. // PHOTOGRAPHER: © DALE LANG
A M A Z O N V U L C A N B L O C K 2 6 & 3 2
022 VIRACON // COMPONENTS & ENHANCEMENTS
S I L K - S C R E E N
S I L K - S C R E E N P A T T E R N S
Viracon offers a variety of standard Viraspan™ Design patterns as well as the ability to customize a façade using your own Viraspan
Design – Original.
V I R A S P A N ™ D E S I G N
SCREEN 22561/8” LINES - 1/2” SPACE
20% COVERAGE
30% COVERAGE
40% COVERAGE
50% COVERAGE
60% COVERAGE
70% COVERAGE
SCREEN 50651/8” DOTS
SCREEN 29731/8” LINES - 9/32” SPACE
SCREEN 59591/8” DOTS
SCREEN 20301/8” LINES - 3/16” SPACE
SCREEN 50061/8” DOTS
SCREEN 20021/8” LINES - 1/8” SPACE
SCREEN 20131” LINES - 1” SPACE
SCREEN 59601/4” DOTS
SCREEN 6002
SCREEN 26041/8” LINES - 3/32” SPACE
SCREEN 50231/8” HOLES
SCREEN 6015
SCREEN 6017
SCREEN 20321/2” LINES - 1/2” SPACE
SCREEN 59617/16” DOTS
SCREEN 20501/4” LINES - 1/4” SPACE
SCREEN 6019
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VIRACON // 023
S I L K - S C R E E N
V I R A S P A N ™ D E S I G N - O R I G I N A L
Borders, graduations or custom patterns you design.
Vi.e. 1/8” Dots with
Solid Borderi.e. 1/8” Dots with
Clear BorderNo Partial Dots/Holes
Allowed
Graduated Patternsthat require centering
Custom Patterns
Borders ofany kind
Example ofpartial dots
I.E. 1/8” DOTS WITHSOLID BORDER
I.E. 1/8” DOTS WITHCLEAR BORDER
NO PARTIAL DOTS HOLES ALLOWED
EXAMPLE OFPARTIAL
DOTS
GRADUATED PATTERNS
PATTERNS WITH DEFINED DETAILTHAT REQUIRE
CENTERING
CUSTOM PATTERNS
BORDERSOF ANY
KIND
LOCATION: SINGAPORE // GLASS TYPE: VLE26-39, CUSTOM SILK-SCREEN // ARCHITECT: DCA ARCHITECTS PTE LTD
GLAZING CONTRACTOR: POSITIVE ENGINEERING PTE LTD // PHOTOGRAPHER: © VIRACON, JJ HAN
D N V G L T E C H N O L O G Y C E N T R E
024 VIRACON // COMPONENTS & ENHANCEMENTS
S I L K - S C R E E N
V I R A S P A N T M C O L O R O P T I O N S
Viracon uses only lead free ceramic frit paints, which are environmentally friendly, to apply the silk-screen pattern onto the
glass surface. A proven performer, Viraspan™ ceramic frit paints are the product of choice for color consistency, durability, cost
control and long life. For silk-screen applications, Viracon offers translucent and opaque* ceramic frit color options.
V I R A S P A N ™ O P A Q U E F R I T V I R A S P A N ™ T R A N S L U C E N T F R I T
HIGH-OPACITY WHITE V175
YELLOW MOON V1091
EVERGREEN V902
SPICE V1090
BLACK V907
BLUE FROST V1089
DARK GRAY V901
SAGE GREEN V1088
SUBDUED GRAY V903
FOG GRAY V1087
GRAY V908
SIMULATED SANDBLAST V1086
WARM GRAY V933
SIMULATED ACID-ETCH V1085
WITHOUT VIRASPAN™ V1086
MEDIUM GRAY V948
DARK BRONZE V900
BRONZE V904
SUBDUED BRONZE V905
BLUE V911
*Opaque is defined as when the products are viewed in reflection with an opaque uniform background.
V1085
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VIRACON // 025
S I L K - S C R E E N
S I L K - S C R E E N O R I E N T A T I O N Pattern placement, aka orientation, must also be considered when specifying silk-screened glass and should be included
in the drawings if you are using a line pattern or for all other patterns if a specific orientation is required.
S T A N D A R D O R I E N T A T I O N
DOT PATTERNS
The dot pattern starts at the base dimension and runs off
the edges of the glass. Partial dots/holes are acceptable
with standard dot pattern orientation.
LINE PATTERNS
The dot pattern is vertical or horizontal and starts with
either a line or space.
DESIGN - PLUS ORIENTATION
A Viraspan Design pattern with requirements beyond standard orientation.
i.e. Pattern on bottom half of lite only.
i.e. Begin pattern 1” from bottom edge.
i.e. Line patterncentered on center line with pattern running off the edges.
When a line pattern is specified, answers to the following
questions should be included in the specifications:
1. Will the lines be vertical or horizontal?
2. Which edge will the pattern start on?
3. Will the pattern start with a line or space?
026 VIRACON // COMPONENTS & ENHANCEMENTS
S I L K - S C R E E N
1" VE1-85 INSULATING SILK-SCREEN
1/4" (6mm) clear with VE-85 #21/2" (13.2mm) airspace
1/4" (6mm) clear with 50% coverage, V175 White #3
1" VE1-85 INSULATING SILK-SCREEN
1/4" (6mm) clear with VE-85 and 50% coverage, V175 White #21/2" (13.2mm) airspace
1/4" (6mm) clear
VLT 47%Winter u-value 0.31Summer u-value 0.29SHGC 0.42
VLT 47%Winter u-value 0.31Summer u-value 0.29SHGC 0.37
S I L K - S C R E E N P E R F O R M A N C E Viracon recommends applying the silk-screen pattern to the second (#2) surface for optimum solar performance. The Low-E
or reflective coating can be applied to the same surface as the silk-screen pattern.
VE-85 #2VE-85 AND
SILK-SCREEN #2
SILK-SCREEN #3
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VIRACON // 027
S I L K - S C R E E N
E X A M P L E S P E C I F I C A T I O N
1. 1” VRE1-59 INSULATING COATED SILK-SCREENED GLASS AS MANUFACTURED BY VIRACON
a. Exterior Glass Ply: 1/4” Clear HS
b. Ceramic Frit: V933 Warm Gray on #2 Surface
c. Pattern: Viraspan Design Screen 5959 – lines
d. Orientation: Horizontal lines, starting at the top with a line
e. Coating: VRE-59 on #2 Surface
f. Airspace: 1/2” aluminum, black painted
g. Silicone: black
h. Interior Glass Ply: 1/4” Clear HS
2 . P E R F O R M A N C E R E Q U I R E M E N T S
a. Visible Light Transmittance: 39%
b. Exterior (Vis-Out) Reflectance: 25%
c. Winter U-Value: 0.30
d. Summer U-Value: 0.27
e. Shading Coefficient: 0.31
f. Solar Heat Gain Coefficient: 0.27
g. Light to Solar Gain Ratio: 1.44
S P E C I F Y I N G S I L K - S C R E E N G L A S S
When specifying silk-screened glass, include the pattern, color and orientation in the overall glass composition. If it is not
practical to describe the orientation in the specification, a drawing should be referenced to clearly identify orientation.
LOCATION: SANTA CLARA, CALIFORNIA
GLASS TYPE: VNE1-63, CUSTOM SILK-SCREEN
ARCHITECT: STUDIO G ARCHITECTS
GLAZING CONTRACTOR: USA ALL GLASS INC.
PHOTOGRAPHER: © VIRACON, RYAN HOFFMAN
O R C H A R D T R I M B L E
028 VIRACON // COMPONENTS & ENHANCEMENTS
S I L K - S C R E E N
S I L K - S C R E E N D E S I G N G U I D E L I N E S Silk-screen patterns may be applied to any surface except the exterior (#1) surface. Viracon recommends applying the silk-
screen pattern to the #2 surface for optimal performance. See silk-screen performance for additional information.
PATTERNS 1/16” minimum dot, pixel or space
COVERAGE For coverage options, refer to ceramic frit coverage rules on the following page.
DUAL SURFACE PATTERNS Placing a silk-screen pattern on two surfaces within an insulating unit is feasible, however extreme caution should be taken during
the design process to minimize the potential for a moiré pattern to appear. Recommendations for designing dual surface patterns can
be found in our Ceramic Frit and Ink Visual Characteristics Tech Talk.
For information regarding design restrictions, please visit viracon.com.
LOCATION: VIRGINIA BEACH, VIRGINIA // GLASS TYPE: VNE1-63, VE1-2M, VE1-85, CUSTOM SILK-SCREEN // ARCHITECT: RRMM ARCHITECTS
GLAZING CONTRACTOR: WALKER & LABERGE CO. INC. // PHOTOGRAPHER: © COURTESY WALKER & LABERGE CO. INC.
T I D E W A T E R C O M M U N I T Y C O L L E G E L E A R N I N G R E S O U R C E C E N T E R , J O I N T U S E L I B R A R Y
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VIRACON // 029
When considering translucent frits for spandrel applications note that these areas may be prone to condensation formation on interior
glass surfaces. Over time, this may result in a visible film formation. Therefore, consideration must be given to the suitability of these
products in spandrel applications. For these applications, the translucent frit may only be applied to non-exposed surfaces.
See silk-screen inspection guidelines and manufacturing tolerances on page 117 for additional information.
M O I R É P A T T E R N
Moiré is an optical phenomenon that typically appears as a wavy, rippled or circular pattern. It is formed when two regularly spaced, non-
aligned patterns overlap. When using spandrel glass, moiré can occur when a pattern’s shadow is cast against the spandrel glass. The
moiré pattern is not a defect in the glass or spandrel process, but rather a pattern formed by the eye. For additional information, please
review Viracon’s Ceramic Frit and Ink Visual Characteristics Tech Talk.
S I L K - S C R E E N
C E R A M I C F R I T C O V E R A G E R U L E S All maximums listed are for any one square foot area of a glass unit.
Type Color Coverage
Silk-screen pattern Opaque, except V175 White 60% Maximum
Silk-screen pattern V175 High Opacity White 80% Maximum
Silk-screen pattern Translucent 80% Maximum
Full coverage translucent frit**(Frosted, non-pattern) Translucent 100%
Spandrel Opaque 100%
**Not available for interior applications and not available with coatings on the same surface. Also, when translucent fri t is used as full coverage, inherent characteristics
may make this product unsuitable for vision areas. These characteristics include slight variations in color and uniformity, pinholes or streaks.
VIRACON // COMPONENTS & ENHANCEMENTS030
D i g i t a l D i s t i n c t i o n s ™
D I G I T A L D I S T I N C T I O N S ™
The great possibilities of architectural design are now even more possible. DigitalDistinctions™ by Viracon combines the durability of
ceramic inks with the versatility of digital printing into one proven solution for all glass-printing applications. A stunning technology
that’s as beautiful and imaginative as it is functional.
D E S I G N W I T H O U T L I M I T S
DigitalDistinctions™ by Viracon finally removes the limitations of screen-printing. Now, you can print a vast number of colors on
glass with complete predictability, repeatability and ceramic ink durability. Plus, you’ll enjoy the benefits of greater UV resistance,
transparency, and scratch resistance, while applying Viracon’s solar control coatings directly over the digital image.
The artistic possibilities of DigitalDistinctions™ would mean nothing if it didn’t also meet or exceed functionality requirements. In fact,
digital in-glass printing enhances the functionality of glass and the energy performance of your building by optimizing light diffusion and
transmission, energy efficiency, solar control and the support of carbon emission reduction. Functionality has never looked this good.
CUSTOM DESIGNSMULTI-COLOR IMAGES
GRADUATING PATTERNS SEPIA IMAGES
WHY ARCHITECTS CHOOSE
DIGITALDISTINCTIONS™ BY VIRACON:
+ Virtually unlimited design possibilities.
+ Low-E coatings can be applied over the ceramic ink.
+ Optimized energy performance.
+ Enhanced durability and beauty of ceramic ink.
MULTI-COLOR PATTERNS
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VIRACON // 031
D i g i t a l D i s t i n c t i o n s ™
D I G I T A L D I S T I N C T I O N S T M D U A L I M A G E
D I G I T A L D I S T I N C T I O N S T M A D D I T I O N A L D E S I G N O P T I O N S
D I G I T A L D I S T I N C T I O N S T M
S I M U L A T E D E T C H I N K
Dual image printing consists of a printed image or pattern on one side of the glass that is a different color or image than the other
side of the glass. For example, red dot on white dot (as shown below).
DigitalDistinctions can also be used as a cost effective solution to simulate building materials.
Simulated Etch ink can be used alone or in combination with other ink colors to simulate the look of acid etched or colored etch glass.
BRICK
Note: Images on pages 030-031 are sample images intended to highlight the aesthetic possibili t ies available with DigitalDistinctions.
Please contact Viracon at 800.533.2080 to discuss further design possibili t ies.
ETCH INK WITH COLORETCH INK
STONE STONE WOOD GRAIN
RED DOTS - AS VIEWED FROM INTERIOR WHITE DOTS - AS VIEWED FROM EXTERIOR
Standard and custom patterns can be printed in a vast array of colors by mixing the six basic ink colors: black, white, green, blue, red
and orange-yellow.
VIRACON // COMPONENTS & ENHANCEMENTS032
D i g i t a l D i s t i n c t i o n s ™
D I G I TA L D I S T I N C T I O N S ™ D E S I G N G U I D E L I N E S Images may be applied to any surface except the exterior (#1) surface. Designs should be submitted to Viracon in the format and file
types outlined in our Art File and CAD File Requirments.
PATTERNS 1/16” minimum dot, pixel or space
COVERAGE DigitalDistinctions TM images can cover 100% of the central glass surface. There will be a 2mm nominal clear, ink free border around all edges for
glass without a coating. When a Low-E coating requiring edge deletion is selected, there will be a minimum 3/8” (9.525mm) clear, ink free border
around all edges with coating deletion.
DUAL SURFACE PATTERNS Placing a pattern or image on two surfaces within an insulating unit is feasible however extreme caustion should be taken during the
design process to minimize the potential for a moiré pattern to appear. Recommendations for designing dual surface patterns can be
found in our Ceramic Frit and Ink Visual Characteristics Tech Talks.
M O I R É P A T T E R N
Moiré is an optical phenomenon that typically appears as a wavy, rippled or circular pattern. It is formed when two regularly spaced,
non-aligned patterns overlap. Moiré is not a defect in the glass, silk-screen or digital printing process but rather a pattern formed by
the eye. For additional information, please review Viracon’s Ceramic Frit and Ink Visual Characteristics Tech Talk.
ALL DIGITAL PRINTS MUST BE APPROVED BY THE ARCHITECT OR BY THE BUILDING OWNER AFTER VIEWING A FULL SIZE
MOCK-UP. A WAIVER LETTER MUST BE SIGNED IF NO MOCK-UP IS APPROVED.
Buyer shall be responsible for the accuracy of all documents, data, glass takeoffs, shop drawings, specifications, architectural
drawings, and electronic design files furnished by Buyer to Viracon. Viracon shall not be liable for any errors or omissions in
documents, data, glass takeoffs, shop drawings, specifications, architectural drawings, and electronic design files furnished by
Buyer, including but not limited to drawings not drawn to scale, not accurately depicted glass sizes, not depicting glass edges, or
that do not depict proper orientation of the glass.
C L E V E L A N D I N S T I T U E O F A R T ,
G E O R G E G U N D B U I L D I N G
LOCATION: CLEVELAND, OHIO
GLASS TYPE: VE1-2M, VRE19-59, VE1-45
ARCHITECT: STANTEC ARCHITECTURE
GLAZING CONTRACTOR: ARCHITECTURAL PRODUCT SALES LLC
PHOTOGRAPHER: © GILBERTSON PHOTOGRAPHY
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VIRACON // 033
LOCATION: EL PASO, TEXAS // GLASS TYPE: MONOLITHIC, LAMINATED, DIGITALDISTINCTIONSTM
ARCHITECT: POPULOUS // GLAZING CONTRACTOR: SIGNATURE ARCHITECTURAL ELEMENTS
PHOTOGRAPHER: © BRIAN WANCHO // PRINTED IMAGE ARTIST: ROBERTO DAVIDOFF; DAVID KUNZELMAN
E L P A S O C L O C K T O W E R , S O U T H W E S T U N I V E R S I T Y P A R K
VIRACON // COMPONENTS & ENHANCEMENTS034
H E A T T R E A T M E N T
H E A T T R E A T M E N T
Heat-treated glass is a term used to describe glass that has been processed through a tempering furnace to alter its strength
characteristics. The process is done in order to provide greater resistance to thermal and mechanical stresses and achieve specific
break patterns for safety glazing applications as compared to annealed glass.
The process of heat-treating glass is taking annealed glass, cutting it to its desired size, transferring the glass to a furnace
and heating it to approximately 1,150° F. Once at this temperature, the glass exits the furnace and is then rapidly cooled,
or quenched. Air is blown onto the glass surface on both sides simultaneously. This cooling process creates a state of
high compression at the glass surfaces while the central core of the glass is in a compensating tension. The only physical
characteristics of the glass that change are the improved strength and resistance to thermal stress and shock.
There are two kinds of heat-treated glass, heat-strengthened (HS) and fully tempered (FT). Fabrication requirements,
tolerances, and testing procedures for heat-treated glass are defined in the ASTM International document C 1048.
Due to the process of heat-treating glass, the original flatness of the annealed substrate is slightly modified. This inherent
condition of heat-treated glass results in roller wave distortion and glass bow and warp.
Viracon’s tolerance for roller wave is a maximum of 0.003” (0.076mm) from peak to valley in the center of lites, and a
maximum of 0.008” (0.20mm) within 10.5” (267mm) of the leading or trailing edge. There is no industry standard for heat-
treated glass roller wave, however a tolerance of 0.005” is frequently specified.
Viracon’s tolerance for localized warp for rectangular glass is 1/32” (0.8mm) over any 12” (305mm), or half of the ASTM C 1048
Standard Specification for Heat-Treated Flat Glass standard of 1/16” (1.6mm) over any 12” (305mm span.
To learn more, review Viracon’s Quench Patterns Tech Talk.
M A R I T I M E A N D S E A F O O D I N D U S T R Y
M U S E U M
LOCATION: BILOXI , MISSISSIPPI
GLASS TYPE: VUE1-50
ARCHITECT: H3 HARDY COLLABORATION ARCHITECTURE LLC
GLAZING CONTRACTOR: A-1 GLASS SERVICE, INC.
PHOTOGRAPHER: © RON BUSKIRK
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VIRACON // 035
H E A T T R E A T M E N T
A N N E A L E D ( A N )Raw glass that has not been heat treated is annealed glass.
In a specification, the designation for annealed glass is AN.
H E A T S T R E N G T H E N E D ( H S )Heat-strengthened glass is twice as strong as annealed glass of the same thickness, size and type. If broken, heat-
strengthened glass will break into large shards similar to annealed glass.
The surface compression of heat-strengthened glass with thicknesses of 1/4” (6mm) and less is 4,000 - 7,000 psi. Surface
compression for 5/16” (8mm) and 3/8” (10mm) heat-strengthened glass is 5,000 - 8,000 psi. (Because of reader repeatability
and instrument tolerances, Viracon’s tolerance for heat-strengthened glass surface compression is +/- 1,000 psi.)
While improving the strength and resistance to thermal shock and stress, heat-strengthened glass does not meet safety
glazing requirements as outlined by the American National Standards Institute (ANSI) Z97.1 or the federal safety standard
Consumer Products Safety Commission (CPSC) 16 CFR 1201, and therefore should not be used in these situations.
In a specification, the designation for heat strengthened glass is HS.
F U L LY T E M P E R E D ( F T )Glass with fully tempered surfaces is typically four times stronger than annealed glass and two times as strong as heat-
strengthened glass of the same thickness, size and type. In the event that fully tempered glass is broken, it will break into
fairly small pieces, reducing the chance for injury. In doing so, the small glass shards make it more likely that the glass will
become separated from the opening. The minimum surface compression for fully-tempered glass is 10,000 psi. In addition, it
complies with the safety glazing requirements as outlined by the American National Standards Institute (ANSI) Z97.1 and the
federal safety standard Consumer Products Safety Commission (CPSC) 16 CFR 1201.
In a specification, the designation for fully tempered glass is commonly abbreviated as FT.
H E A T S O A K I N GFully tempered glass may break without warning due to the expansion of nickel sulfide inclusions (NiS) present within float
glass. To avoid the risk of spontaneous breakage in fully tempered glass, a common practice is to avoid the use of tempered
glass whenever possible. Although the incidence of tempered glass breakage due to these inclusions is rare, greater publicity
of their occurrence has resulted in an increased awareness of this phenomenon. In fact, limiting the use of tempered glass in
commercial building applications has become the recommendation of a number of glass suppliers, including Viracon. In some
situations however, tempered glass is required to meet safety glazing requirements or for added strength. In these cases,
Viracon can perform a heat soak test to provide the added assurance that significant spontaneous breakage will not occur.
To learn more, review Viracon’s Tech Talk on Heat Soak Testing.
036 VIRACON // COMPONENTS & ENHANCEMENTS
H O L E S
H O L E S
Viracon offers hole drilling capabilities starting at 1/4 inch. Our Z. Bavelloini vertical two-sided hole drilling equipment offers
precision accuracy.
M A X I M U M N U M B E R O F H O L E SThe maximum number of holes allowed in any lite of glass is ten (10.)
G U I D E L I N E F O R H O L E D I M E N S I O NCircular holes must have a diameter at least 1/16” greater than the thickness of the glass, with 1/4” (6mm) being the smallest
hole allowed. The maximum size of a hole can not be more than 1/3 the narrowest dimension of the glass.
For holes that have a straight edge, or are non-circular, fillets are required in the corners. A fillet is a rounded corner from which the
straight edge emerges. The radius of the fillet must be equal to or greater than the thickness of the glass, but not less than 1/2”.
G U I D E L I N E F O R M I N I M U M G L A S S W I D T H W I T H H O L E SThe minimum width of glass containing holes that can be satisfactorily tempered is an 8” width. All other requirements of hole location,
spacing of holes, and dimensions of holes must also be met.
Inches
Glass Thickness D=MinimumDiameter
1/8 3/16
5/32 7/32
3/16 1/4
1/4 5/16
5/16 3/8
3/8 7/16
1/2 9/16
5/8 11/16
3/4 13/16
Inches
Glass Thickness Minimum Width
1/8 8
5/32 8
3/16 8
1/4 8
5/16 8
3/8 8
1/2 8
5/8 8
3/4 8
Millimeters
Glass Thickness D=MinimumDiameter
3 5
4 6
5 6
6 8
8 10
10 11
12 14
16 17
19 21
Millimeters
Glass Thickness Minimum Width
3 203
4 203
5 203
6 203
8 203
10 203
12 203
16 203
19 203
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VIRACON // 037
H O L E S
G U I D E L I N E F O R H O L E S P A C I N GThe distance from any edge of glass to the nearest point on the rim of the hole (x) must be at least 6mm (1/4”) or 2 times the
thickness of the glass, whichever is greater.
The distance between holes must be 10mm (3/8”) or two (2) times the thickness of the glass, whichever is greater.
G U I D E L I N E F O R H O L E S P L A C E M E N T N E A R T H E G L A S S C O R N E R SHoles near corners must be located so that the nearest edge of the hole is at least 6.5 times the thickness of the glass from
the tip of the corner when the corner is 90° or more.
Inches
Glass Thickness X=Minimum Distance
1/8 1/4
5/32 5/16
3/16 3/8
1/4 1/2
5/16 5/8
3/8 3/4
1/2 1
5/8 1-1/4
3/4 1-1/2
Inches
Glass Thickness X=Minimum Distance
1/8 3/16
5/32 1-1/64
3/16 1-7/32
1/4 1-5/8
5/16 2-1/32
3/8 2-7/16
1/2 3-1/4
5/8 4-1/16
3/4 4-7/8
Millimeters
Glass Thickness X=Minimum Distance
3 6
4 8
5 10
6 12
8 16
10 19
12 25
16 32
19 38
Millimeters
Glass Thickness X=MinimumDistance
3 21
4 26
5 31
6 41
8 52
10 62
12 82
16 103
19 124
038 VIRACON // COMPONENTS & ENHANCEMENTS
LOCATION: PROVO, UTAH / / GLASS TYPE: LAMINATED, POINT-SUPPORTED (CEIL ING INTERIOR) ; VRE1-59 (EXTERIOR)
ARCHITECT: BOHLIN CYWINSKI JACKSON / / GLAZING CONTRACTOR: STEEL ENCOUNTERS
PHOTOGRAPHER: © COURTESY STEEL ENCOUNTERS
N U S K I N I N N O V A T I O N C E N T E R ( E X P A N S I O N )
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VIRACON // 039
N O T C H E S
N O T C H E S
Fabricated on our Z. Bavelloni CNC Machine, Viracon can supply
you with more options for custom enhancements of monolithic
glass. Please refer to the following guidelines when requesting
your specially fabricated glass products.
G U I D E L I N E S F O R N O T C H E S A N D C U T O U T S
To provide you with notches and cutouts, the corners must have
fillets. A fillet is a rounded corner of which the straight edge
emerges. The radius of the fillet must be equal to or greater than
the thickness of the glass, but not less than 1/2”.
All fabricated glass products with holes, notches and cutouts must incorporate fully tempered or heat-strengthened
glass. Due to stresses created in the glass with these cutouts, annealed glass products are not appropriate. In addition,
the guidelines below also apply for notch and cutout requirements.
F A B R I C A T I O N L I M I T A T I O N S
1. The depth or width of the notch or cutout can not have a
dimension larger than 1/3 of the narrowest dimension of
the lite.
2. The leg length must be more than the depth of the notch.
3. The leg length must be at least 3".
4. The depth of the notch must be less than the width.
5. The inside corner(s) must have a radius equal to, or greater
than the thickness of the glass, but not less then 1/2".
Inches
Glass Thickness Minimum Radius
1/8 1/2
5/32 1/2
3/16 1/2
1/4 1/2
5/16 1/2
3/8 1/2
1/2 1/2
5/8 5/8
3/4 3/4
Millimeters
Glass Thickness Minimum Radius
3 12
4 12
5 12
6 12
8 12
10 12
12 12
16 16
19 19
040 VIRACON // COMPONENTS & ENHANCEMENTS
E D G E W O R K
E D G E W O R K
Viracon gives you options when it comes to glass edgework.
Our Busetti two-sided horizontal edger specializes in ground
and polished edges. Our Z.Bavelloini vertical edgers are
dedicated to miter and beveled edge treatments. Choose from:
Seamed, Flat Belt Ground or Flat Belt Seamed, Flat Ground,
Flat Polished or Mitered Edges.
L A M I N AT E D G L A S S E D G E W O R K 1. Ground, polished and mitered edges are available to 2”
thickness for laminated annealed glass.
2. Viracon recommends the aesthetics of ground, polished or
mitered edges of heat treated laminated glass be evaluated
because of the offset edges (edge work must be done prior to
heat treating). The potential for mismatched edges exists to a
maximum of 1/8”.
LOCATION: SARASOTA, FLORIDA / / GLASS TYPE: LAMINATED / / ARCHITECT: HOYT ARCHITECTS
GLAZING CONTRACTOR: NOVUM STRUCTURES LLC / / PHOTOGRAPHER: © THE PATTERSON FOUNDATION, DALE SMITH PHOTOGRAPHER
P A T R I O T P L A Z A , S A R A S O T A N A T I O N A L C E M E T E R Y
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VIRACON // 041
E D G E W O R K
E D G E W O R K O P T I O N S
Type Description Glass Thickness Recommended Application Finish
Seamed
This is the simplest type of edge work whereby the
sharp edges from an “as cut” glass are removed
on a belt seamer.
Available in all thickness’ up to 3/4”
Concealed or Structurally glazed edges
FT & HS only
Seamed Finish as Cut
Flat BeltGround & Seamed
The sharp edges from an “as cut” glass are removed
as well as flares, etc. by manual process.
Available in all thickness’ up to 3/4"
Structurally glazed
FT & HS only
Seamed Finish Belt Ground
Flat Groundwith Arris
This is a machined edge of flat form with a satin finish. 1/8” to 3/4”
Butt jointed edges with silicone seal or
exposed edges
FT & HS only
Ground Finish
Flat Polishwith Arris
This is a machined edge of flat form with arrised edges
which has been polished.1/8" to 3/4" Exposed edges
Polished Finish
Mitered Edges**
This is a flat machined edge from a 1° to a 45° angle to the cut edge of the panel.
The thickness of glass remaining at the edge is
1/16” (nominal).
3/16” to 3/4”
Butt jointed edges with silicone seal - Ground or exposed edge (polished)
Ground FT & HS only
Polished or Ground Finish
** For mitered edges a customer sketch is required to identify the angle size and orientation.
Requests incorporating a mitered edge and a silk-screened pattern must be approved.
VIRACON // COMPONENTS & ENHANCEMENTS042
S H A P E S & P A T T E R N C U T S
S H A P E S & P A T T E R N C U T S
Viracon has the capability to cut glass lites to a specific pattern or shape; below is a reference for the type of pattern cuts
available. Please contact Viracon to discuss the capability of incorporating pattern glass lites into the final glass unit you
desire; special approval may be required. Customer drawings (including pattern dimensions) are required to adequately
evaluate pattern availability.
RADIUS PATTERNS MISC / OTHER PATTERNS
*Special approval may be required --Please contact your Viracon Representative.
1 3 13
1442
NON-RADIUS PATTERNS W/ A 90˚ CORNER
Customer Pattern Reference Guide®
5 5A
9
17 19 15
8
9A
25 26
18 20 16 7
21 22 4135 36 37
31 3240
29 2330
NON-RADIUS PATTERNS W/ NO 90˚ CORNER
4347 48
5256 57
42 60 51
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VIRACON // 043
F I O N A S T A N L E Y H O S P I T A L
LOCATION: PERTH, WESTERN AUSTRALIA
GLASS TYPE: VNE1-63, VNE19-63
ARCHITECT: SILVER THOMAS HANLEY; HAMES SHARLEY; HASSELL
GLAZING CONTRACTOR: SHENYANG YUANDA ALUMINUM IND
PHOTOGRAPHER: © WIKIMEDIA COMMONS
044 VIRACON // COMPONENTS & ENHANCEMENTS
LOCATION: PORTLAND, OREGON / / GLASS TYPE: VE2-2M / / ARCHITECT: SERA ARCHITECTS; CUTLER ANDERSON ARCHITECTS
GLAZING CONTRACTOR: BENSON INDUSTRIES LLC / / PHOTOGRAPHER: © WIKIMEDIA COMMONS
E D I T H G R E E N - W E N D E L L W Y A T T F E D E R A L B U I L D I N G ( R E N O V A T I O N )
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VIRACON // 045
LOCATION: AMHERST, MASSACHUSETTS / / GLASS TYPE: VE1-2M / / ARCHITECT: WILSON ARCHITECTS (DESIGN ARCHITECT) ; RDK ENGINEERS
GLAZING CONTRACTOR: R & R WINDOW CONTRACTORS / / PHOTOGRAPHER: © COURTESY R & R WINDOW CONTRACTORS
L I F E S C I E N C E L A B O R A T O R I E S , U N I V E R S I T Y O F M A S S A C H U S E T T S
F E D E R A L O F F I C E B U I L D I N GLOCATION: MIRAMAR, FLORIDA / / GLASS TYPE: VLE13-57, VRE13-59, CYBERSHIELDTM
ARCHITECT: GENSLER (PROJECT ARCHITECT) ; KRUECK + SEXTON ARCHITECTS (DESIGN ARCHITECT)
GLAZING CONTRACTOR: ENCLOS CORP. ; BAKER METAL PRODUCTS / / PHOTOGRAPHER: © COURTESY HENSEL PHELPS
INSULATI
NG GLASS
C O M P O N E N T S & E N H A N C E M E N T S O V E R V I E W
0048 VIRACON // COMPONENTS & ENHANCEMENTS
VIRACON // 049
K E E P B U I L D I N G S W A R M I N T H E W I N T E R , C O O L I N T H E S U M M E R A N D B E A U T I F U L E V E R Y D A Y O F T H E Y E A R .
M A R R I O T T M A R Q U I S ( P R E V I O U S )
LOCATION: WASHINGTON, DC
GLASS TYPE: VRE1-59, VRE1-38, VE1-2M, LAMINATED POINT-SUPPORTED (CANOPY)
ARCHITECT: COOPER CARRY
GLAZING CONTRACTOR: TSI EXTERIOR WALL SYSTEMS; NOVUM STRUCTURES (CANOPY)
PHOTOGRAPHER: © HALKIN | MASON | PHOTOGRAPHY
L I B E R T Y P A R K W A Y T O W E R
LOCATION: PHILADELPHIA, PENNSYLVANIA
GLASS TYPE: VRE1-54, VE19-2M, VE1-2M
ARCHITECT: BALLINGER
GLAZING CONTRACTOR: NATIONAL GLASS & METAL CO. ; DECISION DISTRIBUTION
PHOTOGRAPHER: © JEFFREY TOTARO
050 PRODUCT OVERVIEW
051 PRODUCT COMPONENTS
052 STANDARD INSULATING GLASS
053 INSULATING LAMINATED
056 LAMINATED INSULATING
058 DOUBLE LAMINATED INSULATING
060 TRIPLE INSULATING
062 CLEARPOINT™
064 SPACERS
069 SILICONE
070 SPACER FILL
072 SIZES
INSULATING GLASS HIGHLIGHTS
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050 VIRACON // INSULATING GLASS
I N S U L A T I N G G L A S S
Insulating glass is two or more plies of glass enclosing a hermetically sealed air space. Inherently, insulating glass increases
a window’s thermal performance by reducing the heat gain or loss.
At Viracon, insulating glass units are double sealed with a primary seal of polyisobutylene and a secondary seal of silicone. To
provide a hermetically sealed and dehydrated space, the glass plies are separated by a desiccant-filled spacer with three bent
corners and one keyed-soldered corner or four bent corners and one butyl injected zinc plated steel straight key joint. The
desiccant absorbs the insulating glass unit’s internal moisture.
P R O D U C T O V E R V I E W
I N S U L A T I N G G L A S S C O N F I G U R A T I O N S
LAMINATED INSULATING
TRIPLE INSULATINGDOUBLE LAMINATED INSULATING
INSULATING LAMINATED
CLEARPOINT™
INSULATING
VIRACON // 051
I N S U L A T I N G G L A S S
SPACER
GLASS SUBSTRATES AND GLASS HEAT TREATMENT
COATING ON #2 SURFACE
SILICONE
P R O D U C T C O M P O N E N T S
When specifying insulating glass, it is important to select and clearly outline the configuration as well as each individual
component of the insulating glass unit.
Reference pages 005 - 042 for Viracon product enhancements such as: coatings, silk-screens, DigitalDistinctionsTM and more;
that can be combined with insulating units to obtain improved thermal performance and aesthetic design.
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052 VIRACON // INSULATING GLASS
S T A N D A R D I N S U L A T I N G G L A S S
In addition to the improved solar
performance, insulating glass offers a
greater availability of coatings.
Low-E coatings which cannot be exposed,
and therefore cannot be used with
monolithic glass, can be used inside the
insulating unit where they are protected
by the hermetically sealed space.
Insulating units also have more aesthetic
possibilities than monolithic glass.
The Low-E coating and silk-screen
pattern,
if desired, are applied to the exterior ply of
glass leaving the interior ply available for
additional treatment.
For a spandrel location, a full coverage
opaque ceramic frit can be applied to the
inner face (surface #4). For vision areas
where daylight is desired but view through
needs to be minimized, a translucent
ceramic frit can be applied to the surface
facing the airspace (surface #3).
The most common insulating glass unit is constructed with two plies of glass and one sealed air space. This configuration is
a dual pane or double pane insulating glass unit, however is commonly shortened to insulating glass. Insulating glass is used
due to the improvement in solar performance it provides. The most significant improvement is thermal performance (u-value)
which improves by approximately 50% when compared to a monolithic glass ply. This improvement occurs whether the glass is
coated or uncoated.
S T A N D A R D I N S U L A T I N G G L A S S
1" CLEAR INSULATING 1/4" (6mm) clear
1/2" (13.2mm) airspace1/4" (6mm) clear
1/4" CLEAR MONOLITHIC1/4" (6mm) clear
1" VS1-20 INSULATING 1/4" (6mm) clear with VS-20 #2
1/2" (13.2mm) airspace1/4" (6mm) clear
1/4" VS1-20 MONOLITHIC 1/4" (6mm) clear with VS-20 #2
VLT 79%Winter u-value 0.47Summer u-value 0.49SHGC 0.70
VLT 88%Winter u-value 1.02Summer u-value 0.92SHGC 0.82
VLT 20%Winter u-value 0.86Summer u-value 0.75SHGC 0.31
VLT 18%Winter u-value 0.42Summer u-value 0.43SHGC 0.23
VS-20 #2VS-20 #2
VIRACON // 053
I N S U L A T I N G L A M I N A T E D
Viracon Insulating Laminated Glass provides the solar controlling properties of an insulating unit along with the safety
features of the laminated inboard component. This allows the flexibility to design with hundreds of combinations of tinted
glass, high-performance coatings, silk-screen patterns and pigmented interlayers, together or alone. In addition, Insulating
Laminated Glass enhances acoustical performance, ultraviolet light protection, and the laminated component is designed to
remain integral in the opening should glass damage occur. For this reason, insulating laminated glass is utilized for skylights
or other overhead
glazing applications.
Often the laminated inboard component is required to provide protection against man-made threats or natural disasters such
as hurricanes, bomb blasts or forcible-entry.
I N S U L A T I N G L A M I N A T E D
For more information on which laminated interlayer
to use, reference the “Laminated Glass Section” on page 80.
A typical insulating laminated glass configuration is 1-5/16” thick overall constructed as follows:
THERMAL PROPERTIES OF INSULATING
GLASS COMBINED WITH THE SAFETY GLAZING
PROPERTIES OF LAMINATED GLASS MAKE IT
THE IDEAL CHOICE FOR:
+ Hurricane-Resistance
+ Blast-Resistance
+ Skylights
+ UV Protection
+ Acoustical Performance
EXTERIOR:1/4" (6mm) GLASS PLY
COATING ON SURFACE #2
1/2" (13.2mm) AIRSPACE
INTERIOR: 2 PLIES OF 1/4" (6mm) GLASS
LAMINATED TOGETHER WITH MINIMUM .060"
(1.52mm) INTERLAYER
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054 VIRACON // INSULATING GLASS
I N S U L A T I N G L A M I N A T E D
I N S U L AT I N G L A M I N AT E D P E R F O R M A N C E
While insulating laminated glass provides numerous benefits from protection to safety to acoustic improvements, the solar
performance between an insulating unit and the insulating laminated counterpart is nominal.
1-5/16" VUE1-50 INSULATING LAMINATED 1/4" (6mm) clear with VUE-50 #2
1/2" (13.2mm) airspace1/4" (6mm) clear
.060" (1.52mm) clear PVB1/4" (6mm) clear
1" VUE1-50 INSULATING 1/4" (6mm) clear with VUE-50 #2
1/2" (13.2mm) airspace1/4" (6mm) clear
VLT 46%Winter u-value 0.29Summer u-value 0.25SHGC 0.25
VLT 48%Winter u-value 0.29Summer u-value 0.26SHGC 0.25
VUE-50 #2 VUE-50 #2
VIRACON // 055
LOCATION: CHICAGO, ILL INOIS / / GLASS TYPE: VE1-85, VE1-2M / / ARCHITECT: SOLOMON CORDWELL BUENZ
GLAZING CONTRACTOR: SUPER SKY PRODUCTS / / PHOTOGRAPHER: © WILLIAM LEMKE
C E N T E R F O R S U S T A I N A B L E U R B A N L I V I N G , L O Y O L A U N I V E R S I T Y
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056 VIRACON / / INSULATING GLASS
L A M I N A T E D I N S U L A T I N G
Laminated insulating glass is an insulating glass unit with a laminated outboard. This configuration can be used in
applications where the exterior is overhead glazing or in specific hurricane zones where safety glazing is required for the
exterior.
A typical laminated insulating glass configuration is 1-5/16” thick overall constructed as follows:
L A M I N A T E D I N S U L A T I N G
THERMAL PROPERTIES OF INSULATING
GLASS COMBINED WITH THE SAFETY
GLAZING PROPERTIES OF LAMINATED
GLASS MAKE IT THE IDEAL CHOICE FOR:
+ Hurricane-Resistance
+ Blast-Resistance
+ UV Protection
+ Acoustical Performance
INTERIOR: 1/4" (6mm) GLASS PLY
1/2" (13.2mm) AIRSPACE
COATING ON SURFACE #4
EXTERIOR: 2 PLIES OF 1/4" (6mm) GLASS
LAMINATED TOGETHER WITH MINIMUM .060"
(1.52mm) INTERLAYER
VIRACON // 057
L A M I N A T E D I N S U L A T I N G
It is important to note, with laminated insulating glass there are two primary options for Low-E or Reflective coating
placement within the unit. Coatings can be placed on the #2 surface, however superior solar performance can be achieved
by placing the coating on the #4 surface, touching the air space.
1-5/16" LAMINATED INSULATING 1/4" (6mm) clear
.060" (1.52mm) clear PVB1/4" (6mm) clear with VE-42 #4
1/2" (13.2mm) airspace1/4" (6mm) clear
1-5/16" VE1-42 LAMINATED INSULATING 1/4" (6mm) clear with VE-42 #2
.060" (1.52mm) clear PVB1/4" (6mm) clear
1/2" (13.2mm) airspace1/4" (6mm) clear
VLT 36%Winter u-value 0.30Summer u-value 0.28SHGC 0.29
VLT 36%Winter u-value 0.46Summer u-value 0.48SHGC 0.31
VE-42 #2 VE-42 #4
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058 VIRACON // INSULATING GLASS
Double laminated insulating glass units have both a laminated inboard and laminated outboard with a space in between. This
configuration is often selected when improved OITC acoustic performance is desired such as in schools. In addition, double
laminated insulating units can meet protective glazing requirements.
A typical double laminated insulating glass configuration is 1-5/8" thick overall constructed as follows:
D O U B L E L A M I N A T E D I N S U L A T I N G
THERMAL PROPERTIES OF INSULATING
GLASS COMBINED WITH THE SAFETY GLAZING
PROPERTIES OF LAMINATED GLASS MAKE IT
THE IDEAL CHOICE FOR:
+ Hurricane-Resistance
+ Blast-Resistance
+ UV Protection
+ Acoustical Performance
INTERIOR: 2 PLIES OF 1/4" (6mm)
GLASS LAMINATED TOGETHER WITH MINIMUM
.060" (1.52mm) INTERLAYER
1/2" (13.2mm) AIRSPACE
COATING ON SURFACE #4
EXTERIOR: 2 PLIES OF 1/4" (6mm) GLASS
LAMINATED TOGETHER WITH MINIMUM .060"
(1.52mm) INTERLAYER
D O U B L E L A M I N A T E D I N S U L A T I N G
VIRACON // 059
There are eight surfaces in a double laminated insulating glass unit and two primary options for Low-E or Reflective coating
placement within the unit. Coatings placed on the #2 surface decrease solar heat gain. However, superior solar performance,
including an improved u-value, is achieved by placing the coating on the #4 surface touching the air space.
1-5/8" VE1-48 DOUBLE LAMINATED INSULATING 1/4" (6mm) clear with VE-48 #2
.060" (1.52mm) clear PVB1/4" (6mm) clear
1/2" (13.2mm) airspace1/4" (6mm) clear
.060" (1.52mm) clear PVB1/4" (6mm) clear
1-5/8" VE1-48 DOUBLE LAMINATED INSULATING 1/4" (6mm) clear
.060" (1.52mm) clear PVB1/4" (6mm) clear with VE-48 #4
1/2" (13.2mm) airspace1/4" (6mm) clear
.060" (1.52mm) clear PVB1/4" (6mm) clear
VLT 43%Winter u-value 0.44Summer u-value 0.46SHGC 0.34
VLT 43%Winter u-value 0.29Summer u-value 0.27SHGC 0.33
D O U B L E L A M I N A T E D I N S U L A T I N G
VE-48 #2 VE-48 #4
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060 VIRACON / / INSULATING GLASS
T R I P L E I N S U L A T I N G
T R I P L E I N S U L A T I N G
1" VRE1-54 INSULATING1/4" (6mm) clear with VRE-54 #2
1/2" (13.2mm) airspace1/4" (6mm) clear
1" VRE1-54 TRIPLE INSULATING1/8" (3mm) clear with VRE-54 #2
5/16" (7.5mm) airspace1/8" (3mm) clear
5/16" (7.5mm) airspace1/8" (3mm) clear
VLT 47%Winter u-value 0.30Summer u-value 0.27SHGC 0.31
VLT 44%Winter u-value 0.27Summer u-value 0.29SHGC 0.29
1-3/4" VRE1-54 TRIPLE INSULATING 1/4" (6mm) clear with VRE-54 #2
1/2" (13.2mm) airspace1/4" (6mm) clear
1/2" (13.2mm) airspace1/4" (6mm) clear
VLT 42%Winter u-value 0.22Summer u-value 0.22SHGC 0.28
The most common triple insulating glass units are constructed with
three plies of glass separated by two hermetically sealed and dehydrated
spaces. This construction increases the insulating value of the glass
unit, thus reducing the u-value. A triple insulating glass unit is especially
useful in applications where a low u-value is necessary.
While it is possible to specify a 1” triple insulating unit to coincide with
a 1” dual pane insulating unit, it is not always practical. A 1” triple
insulating unit is constructed with 1/8” glass plies rather than 1/4” plies
as used in a 1” dual pane insulating unit. The reduced glass thickness
increases the potential for distortion and since the 1/8” plies are not as
strong as 1/4” plies, the width and height of the glass units must also be
decreased. In addition, the solar performance improvement is minimal.
More commonly, triple insulating glass units are constructed with three
plies of 1/4” glass and two 1/2” spaces. Viracon’s triple insulating glass
units are available with the same Low-E coatings offered with dual pane
insulating glass and the Low-E coating is placed on the #2 surface. TRIPLE INSULATING KEY BENEFITS:
+ Two spacers provide superior insulating performance
+ Reduces the center of glass u-value
VRE-54 #2 VRE-54 #2 VRE-54 #2
VIRACON // 061
T R I P L E I N S U L A T I N G
The third ply of glass in a triple insulating unit also offers the option to add a second Low-E coating within the glass unit.
The second coating is Viracon’s VE-85, a highly transparent coating added to the #4 surface to further improve the solar
performance without adversely affecting the appearance.
1-3/4" VRE1-54 TRIPLE INSULATING WITH A SECOND LOW-E COATING1/4" (6mm) clear with VRE-54 #2
1/2" (13.2mm) airspace1/4" (6mm) clear with VE-85 #4
1/2" (13.2mm) airspace1/4" (6mm) clear
VLT 41%Winter u-value 0.16Summer u-value 0.17SHGC 0.25
VRE-54 #2
VE-85 #4
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ClearPoint
NEW!
C L E A R P O I N T T M
ClearPoint™ by Viracon is a point-
supported insulating glass system that
increases the transparency of glass
façades. Specifically engineered to provide
building designers with greater flexibility,
ClearPoint™ allows architects to maximize
clear openings and enhance aesthetics,
delivering a clean, contemporary look both
inside and out.
The hardware solution offered by Viracon
is made from 316 stainless steel and
has a Number 4 finish. The interior base
spacer that rests between the exterior
and interior glass of the insulating
glass unit is comprised of a proprietary
material that has passed testing for
out-gassing, ultraviolet light, caulking
and discoloration. A countersunk system
is available for applications requiring
exterior tempered glass solutions.
Nupress can supply a variety of stems that
connect the insulating glass unit fitting to
the client’s connection point.
CLEARPOINT
EXTERIOR INTERIOR
C L E A R P O I N T™
P O I N T - S U P P O R T E D I N S U L A T I N G G L A S S
ClearPointTM units can be combined with Viracon components and enhancements to improve
thermal performance, safety glazing and aesthetic design.
CLEARPOINTTM KEY BENEFITS:
+ Increases the transparency of glass facades
+ Maximizes natural daylight into the building
+ Low-E coating, silk-screen and DigitalDistinctionsTM
capabilities to optimize aesthetics and performance.
+ Backed by Viracon heat soaked tempered glass and insulating glass Standard limited Warranties for peace of mind.
+ Approved with Argon gas filled spacer - Viracon is the only glass fabricator in North America to offer an IGCC-certified insulating point-supported system with an argon gas filled spacer.
Viracon offers a raised glass fi t t ing with a button
design; ProudMount by NuPress.
VIRACON // 063
LOCATION: BASTROP, TEXAS / / GLASS TYPE: VRE29-38, VRE29-54, CLEARPOINTTM, DIGITALDISTINCTIONSTM
ARCHITECT: HUSMANN ARCHITECTURE / / GLAZING CONTRACTOR: JAMCO / / PHOTOGRAPHER: © VIRACON, MIKE WINKLER
J A M C O T E X A S H E A D Q U A R T E R S
LOCATION: COLUMBUS, OHIO
GLASS TYPE: LAMINATED, SILK-SCREEN, CLEARPOINTTM (CANOPY) ; VE1-2M
ARCHITECT: HOK; MOODY NOLAN
GLAZING CONTRACTOR: SUPER SKY PRODUCTS (CANOPY) ; UNITED SKYS INC.
PHOTOGRAPHER: © WILLIAM LEMKE
H I L T O N C O L U M B U S D O W N T O W N
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S P A C E R S
S P A C E R S
A P P E A R A N C E
Color choices include a black painted finish or a mill finish
which has a silver appearance. Mill finish spacers can be
seen in the majority of existing buildings as they were the
standard in the glass industry for many years. The trend
is moving to black painted spacers as designers see the
clean look this option provides. Black spacers tend to
blend with the gaskets and framing which minimizes the
overall visual impact by leading occupants to look through
the glass rather than at the framing or spacer. The color
of the spacer does not affect the solar performance of the
insulating glass.
T H I C K N E S S
The thickness of the spacer will determine the distance,
or space, between the two glass plies in an insulating
unit. Viracon’s typical 1” insulating units are constructed
using a 1/2” (13.2 mm) nominal thickness spacer, however
a wide variety of alternate thickness spacers is available.
Even a minimal change in the thickness of the spacer can
affect solar performance so it is important to include the
thickness in a specification.
An insulating glass spacer is placed within the unit to separate the two or more plies of glass. Viracon’s insulating glass
spacers are available in two colors, three materials and a variety of thicknesses. When specifying an insulating glass unit, it is
necessary to specify all three; color, material and thickness.
7/8" VE1-48 INSULATING1/4" (6mm) clear with VE-48 #2
15/32" (12mm) airspace1/4" (6mm) clear
1" VE1-48 INSULATING1/4" (6mm) clear with VE-48 #2
1/2" (13.2mm) airspace1/4" (6mm) clear
1-1/16" VE1-48 INSULATING1/4" (6mm) clear with VE-48 #2
9/16" (14mm) airspace1/4" (6mm) clear
VLT 47%Winter u-value 0.31Summer u-value 0.30SHGC 0.38
VLT 47%Winter u-value 0.31Summer u-value 0.28SHGC 0.37
VLT 47%Winter u-value 0.31Summer u-value 0.28SHGC 0.37
SPACER
15/32" SPACER
1/2" SPACER
9/16" SPACER
VIRACON // 065
M A T E R I A L
Aluminum, Stainless Steel and ExtremEdge™ are the three spacer material options available from Viracon. Although
aluminum is the most specified, increasing energy performance requirements are escalating the demand for alternate
spacer options to improve edge of glass (EOG) u-value.
A L U M I N U M
Historically has been the most-used spacer because of its malleability and availability.
S T A I N L E S S S T E E L
A warm edge spacer option offered by Viracon. Stainless steel has one-tenth the thermal conductivity of aluminum.
E X T R E M E D G E ™
Viracon’s newest warm edge spacer offering. The ExtremEdge™ spacer consists of a biopolymer in the cross section area
which is encapsulated in stainless steel. This combination further reduces the edge conductivity and thus reduces heat transfer
into the building.
S P A C E R S
MILL FINISH
BLACK
EXTREMEDGETM
STAINLESS STEEL
ALUMINUM
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066 VIRACON // INSULATING GLASS
S P A C E R S
Black painted and black anodized finishes are interchangeable.
S P A C E R A V A I L A B I L I T YPlease use this chart as a guideline when selecting spacer color, material and thickness.
Aluminum Stainless Steel ExtremEdgeTM
Nominal Thickness Black Mill Finish Black Mill Finish Black Mill Finish
5/16" 7.5mm YES
3/8" 9.0mm YES YES YES
7/16" 11mm YES
15/32" 12mm YES YES YES
1/2" 13.2mm YES YES YES YES
17/32" 13.5mm YES YES
9/16" 14mm YES
5/8" 15.5mm YES YES YES
3/4" 18.5mm YES YES YES YES
7/8" 22mm YES YES
1" 25.4mm YES YES YES
LOCATION: AUSTIN, TEXAS
GLASS TYPE: VE1-42, VE1-2M
ARCHITECT: HKS, INC.
GLAZING CONTRACTOR: HARMON, INC.
PHOTOGRAPHER: © JONATHAN JACKSON
I B C B A N K P L A Z A
ExtremEdge™ cannot be used in spandrel applications.
VIRACON // 067
Spacer materials that improve the u-value beyond the performance offered by aluminum are commonly grouped together under
the category of warm edge spacers or warm edge technology. Below is an example of the improvement in thermal performance
that can be obtained by using Viracon's warm edge spacers; ExtremEdgeTM and Stainless Steel.
1. Center of glass u-value is calculated using WINDOW 7.
2. Rough opening u-value is generated by an NFRC certified simulator using THERM 6.3 and WINDOW 6.3 based on NFRC Standard 100-2010 in a thermally enhanced
framing system.
3. Condensation Resistance (CR): A relative indicator of a fenestration product's ability to resist the formation of condensation at a specific set of environmental conditions.
The higher the Condensation Resistance value the greater the resistance to the formation of condensation.
S P A C E R P E R F O R M A N C E
Aluminum Spacer ½" (13.2 mm)
Stainless Steel Spacer ½" (13.2 mm)
ExtemEdgeTM Spacer17/32" (13.5 mm)
1" VE1-2M Insulating Center of Glass U-Value1 Rough Opening U-Value2
Conventionally Glazed Framing System
.25 .39 .38 .37
CR 348 CR 352 CR 356
2-Sided Structurally Glazed Framing System
.25 .35 .33 .32
CR 353 CR 357 CR 364
4-Sided Structurally Glazed Framing System
.25 .34 .31 .30
CR 356 CR 360 CR 363
SPACER
TWO PLIES 1/4" (6MM) CLEAR GLASS
VE-2M COATING #2
ARGON FILLED SPACE
S P A C E R S
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068 VIRACON // INSULATING GLASS
LOCATION: PORTLAND, OREGON // GLASS TYPE: VE1-2M, VNE1-63 // ARCHITECT: CO ARCHITECTS (DESIGN); SERA ARCHITECTS (EXECUTIVE)
GLAZING CONTRACTOR: HARMON, INC. // PHOTOGRAPHER: © DALE LANG
C O L L A B O R A T I V E L I F E S C I E N C E S B U I L D I N G , O H S U / O S U
LOCATION: PANGYO, KOREA
GLASS TYPE: VNE1-63
ARCHITECT: HAEAHN ARCHITECTURE
GLAZING CONTRACTOR: WALLINK INTERNATIONAL LTD.
PHOTOGRAPHER: © ANNEWS, WWW.ANNEWS.CO.KR
U B I Q U O S S
VIRACON // 069
S I L I C O N E
Viracon’s insulating glass units are constructed with a dual seal configuration where polyisobutylene (PIB) is the primary seal
and structural silicone is the secondary seal.
PIB is the primary seal of the insulating glass unit preventing moisture vapor transmission into the unit’s sealed space. The
silicone secondary seal acts as the adhesive that holds the unit together in both conventional and structurally glazed systems.
Both the PIB and structural silicone must maintain adhesion to the glass and spacer throughout the life of the unit.
Silicone is uniquely resistant to Ultraviolet light and is the only sealant capable of being exposed long term to UV, temperature
extremes and harsh atmospheric conditions. The high strength of silicone makes it ideal for structurally glazed applications.
S I G H T L I N EAll insulating units have a sightline. The sightline is the edge dimension of the insulating glass unit covered by the spacer.
Insulating glass in a conventionally glazed system typically utilizes a 1/2" sightline.
The sightline for insulating glass in structurally glazed applications must be calculated based on the unit size and wind load.
This ensures there is enough silicone to glass contact to appropriately support the insulating unit and exterior glass ply
when the glass is under load. Sightlines are calculated based on ASTM C1249 Standard Guide for Secondary Seal for Sealed
Insulating Glass Units for Structural Sealant Glazing Applications.
Viracon offers a Deflection and Sightline Reference Guide to assist in identifying the appropriate sightline based on glass size
and load. Contact Viracon for sightline requirements specific to your project.
C O L O RBlack is Viracon's standard sealant color for insulating glass. When black is specified, both the PIB and silicone will be black
as is the case when gray is specified. Please note, the color of the PIB and silicone materials are not identical due to material
differences and will be distinguishable. Gray is available for an additional charge.
SILICONE SEALANT: BLACK OR GRAY
S I L I C O N E
Place insulating unit image and black/gray color boxes near the color section (reduce the size of the IG unit image)
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S P A C E R F I L L
S P A C E R F I L L
When specifying insulating glass with argon, it is important to also consider the thickness of the space. Increasing the
thickness does not necessarily improve the thermal performance. There is an optimal thickness where each gas achieves the
best performance. The optimal thickness for argon is 1/2”.
7/8" VUE1-40 INSULATING1/4" (6mm) clear with VUE-40 #23/8" (11mm) argon filled space
1/4" (6mm) clear
1" VUE1-40 INSULATING1/4" (6mm) clear with VUE-40 #21/2" (13.2mm) argon filled space
1/4" (6mm) clear
1-1/8" VUE1-40 INSULATING1/4" (6mm) clear with VUE-40 #25/8" (15.5mm) argon filled space
1/4" (6mm) clear
VLT 40%Winter u-value 0.26Summer u-value 0.26SHGC 0.22
VLT 40%Winter u-value 0.24Summer u-value 0.20SHGC 0.21
VLT 40%Winter u-value 0.25Summer u-value 0.19SHGC 0.21
LOCATION: DAVIDSON, NORTH CAROLINA
GLASS TYPE: VUE1-50
ARCHITECT: RULE JOY TRAMMELL + RUBIO
GLAZING CONTRACTOR: CABARRUS GLASS CO. INC.
PHOTOGRAPHER: © COURTESY RULE JOY TRAMMELL + RUBIO
M S C I N D U S T R I A L S U P P L Y
C O - H E A D Q U A R T E R S
VIRACON // 071
S P A C E R F I L L
Argon gas alone is not enough to meet energy
requirements. I t should be specified in conjunction
with a Low-E coating in order to provide optimal
thermal performance.
The standard fill option for insulating
glass unit is air.
Argon is an invisible, non toxic gas
with lower thermal conductivity than
air. It can be used in place of air within
an insulating unit to improve thermal
performance (u-value).
1" CLEAR INSULATING1/4" (6mm) clear
1/2" (13.2mm) airspace1/4" (6mm) clear
1" VUE1-40 INSULATING1/4" (6mm) clear with VUE-40 #2
1/2" (13.2mm) airspace1/4" (6mm) clear
1" VUE1-40 INSULATING1/4" (6mm) clear with VUE-40 #21/2" (13.2mm) argon filled space
1/4" (6mm) clear
1" CLEAR INSULATING1/4" (6mm) clear
1/2" (13.2mm) argon filled space1/4" (6mm) clear
VLT 79%Winter u-value 0.47Summer u-value 0.49SHGC 0.70
VLT 40%Winter u-value 0.29Summer u-value 0.26SHGC 0.22
VLT 40%Winter u-value 0.24Summer u-value 0.20SHGC 0.21
VLT 79%Winter u-value 0.45Summer u-value 0.47SHGC 0.70
AIR
AIR
ARGON
ARGON
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S I Z E S
I N S U L A T I N G G L A S S S I Z E S
Insulating units>70 square feet must be reviewed and approved by Viracon prior to receiving a quote.
Triple Insulating units cannot exceed 70 square feet. Double laminated insulating units cannot exceed 40 square feet.
Configurations:
• > 50 square foot units must be heat treated
• Laminated insulating units with a coating on the #4 surface cannot exceed an 84" width or 144" height.
Components & Enhancements:
• Ceramic frit silk-screen or spandrel units cannot exceed an 84" width
• VE-45 coating cannot exceed an 84" width
• RoomSideTM Low-E coating cannot exceed 60" wide x 142" high or 72" wide x 120" high
• ExtremEdgeTM spacer cannot exceed 84" wide x 144" high.
• Units with ExtremEdgeTM cannot exceed 65 square feet.
• ClearPointTM units must be reviewed and approved by Viracon prior to receiving a quote
– Requires a minimum 24" width
– Cannot exceed a 72" width or 120" height when using a SentryGlas® interlayer
– Cannot exceed an 84" width or 144" height when using a PVB interlayer
NOW AVAILABLE IN OVERSIZED CONFIGURATIONS.
Glass sizing is based on 1/4” (6mm) to 3/8” (10mm) thickness for both interior and exterior lites in vertical applications.
165” (4 ,191mm)
204” (5 ,182mm)
12” TO 96” (305mm TO 2,438mm)
12” TO 120” (305mm TO 3'048mm)
36” (914mm)
36” (914mm)
TO TO
CURRENT SIZING OVERSIZED GLASS AVAILABLE TO QUOTE TODAY. SHIPPING BEGINNING MAY 2017
Up To 120 Square Feet
VIRACON // 073
LOCATION: MONTERREY, MEXICO // GLASS TYPE: VRE1-38, VNE1-63 // ARCHITECT: PELLI CLARKE PELLI ARCHITECTS
GLAZING CONTRACTOR: GRUPO ALUVISA // PHOTOGRAPHER: © VIRACON, JUAN SCHNITZLER
T O R R E S O F I A
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074 VIRACON // INSULATING GLASS
LOCATION: TORONTO, ONTARIO, CANADA
GLASS TYPE: VRE1-46, VE1-42, VE24-2M
ARCHITECT: PAGE + STEELE / IBI GROUP ARCHITECTS
GLAZING CONTRACTOR: SOTA GLAZING INC.; TAGG INDUSTRIES
PHOTOGRAPHER: © ELIZABETH JONES, LENSCAPE INC.
S O U T H C O R E F I N A N C I A L C E N T R E
LOCATION: TORONTO, ONTARIO, CANADA
GLASS TYPE: VRE19-59, VLE19-57, VE1-2M
ARCHITECT: KPMB ARCHITECTS
GLAZING CONTRACTOR: OLDCASTLE BUILDING ENVELOPE
PHOTOGRAPHER: © ELIZABETH JONES, LENSCAPE INC.
B R E M N E R T O W E R ( R I G H T ) ,D E L T A H O T E L ( L E F T ) ,S O U T H C O R E F I N A N C I A L C E N T R E
VIRACON // 075
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LOCATION: SANTIAGO, CHILE // GLASS TYPE: VRE1-54
ARCHITECT: PELLI CLARKE PELLI ARCHITECTS (DESIGN); ALEMPARTE BARREDA ARQUITECTOS ASOCIADOS (ARCHITECT OF RECORD)
GLAZING CONTRACTOR: FAR EAST ALUMINUM WORKS // PHOTOGRAPHER: © VIRACON, PEDRO DE LA FUENTE
G R A N T O R R E C O S T A N E R A
L A M I N AT
ED GLASS
VIRACON // 079
A D D S T R E N G T H W I T H O U T S U B T R A C T I N G B E A U T Y .
N O R T H P A T I E N T T O W E R ,
O R L A N D O R E G I O N A L M E D I C A L C E N T E R ( P R E V I O U S )
LOCATION: ORLANDO, FLORIDA
GLASS TYPE: VS1-20, VLE1-57, VLE1-39 (CANOPY)
ARCHITECT: HKS, INC.
GLAZING CONTRACTOR: HARMON, INC. ; SUPER SKY PRODUCTS (CANOPY)
PHOTOGRAPHER: © BEN TANNER
C O L O R A D O T O W E R
LOCATION: AUSTIN, TEXAS
GLASS TYPE: VRE1-46, VRE19-38, VS1-14
ARCHITECT: DUDA | PAINE ARCHITECTS, LLP; KENDALL/HEATON ASSOCIATES
GLAZING CONTRACTOR: JAMCO
PHOTOGRAPHER: © JONATHAN JACKSON
080 PRODUCT OVERVIEW
081 CYBERSHIELD™
082 INTERLAYERS
083 VANCEVA® COLOR
084 APPLICATIONS
086 SIZES
LAMINATED GLASS HIGHLIGHTS
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L A M I N A T E D G L A S S
P R O D U C T O V E R V I E W
The most common laminated glass units are constructed with two plies
of glass permanently bonded together with one or more interlayers.
The most important characteristics of laminated glass are fall-out
protection due to the ability of the interlayer to support and hold the
glass when broken as well as the reduced ability to penetrate the
opening. The ability to resist various kinds of penetration is dependent
upon a number of factors including thickness of the glass and the type
of interlayer selected.
Laminated glass also offers a greater availability of coatings than
monolithic glass. Low-E coatings which cannot be exposed, and
therefore cannot be used with monolithic glass, can be used inside a
laminated unit where they are protected.
Laminated glass units also have more aesthetic possibilities than
monolithic glass. The interlayers used in laminated glass are available
in a variety of colors and opacities. In addition, the Low-E coating and
DigitalDistinctionsTM or silk-screen pattern, if desired, are applied to
the exterior ply of glass leaving the interior ply available for additional
treatment. For a spandrel location, a full coverage opaque ceramic frit
can be applied to surface #4. For vision areas where daylight is desired
but view through needs to be minimized, a translucent ceramic frit can
be applied to surface #3.
LAMINATED GLASS IDEAL FOR:
+ Acoustic
+ Aesthetic
+ Blast-Mitigating
+ Hurricane-Resistant
+ Safety
+ Ultraviolet Protection
INSULATING LAMINATED LAMINATED INSULATINGCYBERSHIELD™ DOUBLE LAMINATED INSULATING
RF SHIELDING
GLASS SUBSTRATESAND
GLASS HEAT TREATMENT
COATING#2 SURFACE
INTERLAYER
VIRACON // 081
C Y B E R S H I E L D ™
C Y B E R S H I E L D ™ WITH PILKINGTON DATASTOP™
With more data being transmitted and shared electronically, it is becoming necessary to protect private conversations,
boardroom discussions and trade secret documents from electronic eavesdropping. This is especially true for government
organizations, businesses, architects and building owners looking for ways to design secure buildings. CyberShield™ by
Viracon with Pilkington DATASTOP™ has been specifically engineered to reduce the transmission of radio frequency (RF)
electromagnetic radiation, also known as RF Shielding.
CyberShield offers electrical attenuation with an average of 45 dB across a frequency range from 35 MHz to 18 GHz, while
optimizing visible light transmission with a neutral glass color. Additionally, glass performance can be enhanced with a
Low-E coating and/or silk-screen or DigitalDistinctionsTM.
CYBERSHIELD™ KEY BENEFITS:
+ Reduces the transmission of radio frequency electromagnetic radiation
PVB
RF Shielding
RFShielding
PVB
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I N T E R L A Y E R S
I N T E R L A Y E R S
I N T E R L A Y E R O P T I O N S
POLYVINYL BUTYRAL (pvb) is a standard architectural interlayer avail-
able in three thicknesses:
a. .030”
b. .060”
c. .090”
SAFLEX® SILENTGLASS ACOUSTIC is a three layer system designed
to decouple and disseminate sound waves for superior sound damping
performance. Interlayer available in .030" thickness
SENTRYGLAS® is an ionoplast interlayer bonded directly between two
layers of glass for superior protection. The rigid interlayer minimizes
deflection. Available interlayer thicknesses:
a. .060”
b. .090”
c. .100”
LEVEL E - SENTRYGLAS® a specialized interlayer combination that is
used for Level E hurricane applications.
STORMGUARD® is an enhanced polyvinyl butyral (pvb) interlayer which
provides excellent adhesion to glass and optimum performance for large
missile hurricane-resistant applications. StormGuard has less deflection
and better tear resistance than standard pvb interlayers. It is also available
in combination with Vanceva® Color interlayers. Interlayer available in .100"
thickness.
LEVEL E - STORMGUARD® a specialized interlayer combination that is
used for Level E hurricane applications
SAFLEX® STORM is a pvb / pet film / pvb composite laminated between
two panes of glass. The composition provides the impact resistance of pvb
and the tear resistance of a polyethylene terephthalate (pet) film. Interlayer
available in .077" thickness
VANCEVA® COLOR is an interlayer system made up of base colors and a
range of white interlayers that can be combined to achieve varying layers of
translucency and color.
Interlayers are used to permanently bond two plies of glass in a laminated configuration. Laminated glass is a great choice for many
applications to meet a variety of requirements.
OUTBOARD LITE
S O L A R P E R F O R M A N C E
The solar performance of a glass unit results
from the configuration of the unit along with
the thickness of the glass used. Altering the
thickness of an interlayer in a laminated
glass unit, will have an insignificant effect on
performance data. I N T E R L A Y E R S A N D C O A T I N G S
Each interlayer has different availability
with each of Viracon’s coatings. For more
information, reference the Viracon Coating
Availability By Product Configuration Chart
on pages 012 - 013.
INTERLAYER
COATING (ON #2 SURFACE)
INBOARD LITE
Viracon offers a vast selection of interlayer options to meet your specific requirements.
VIRACON // 083
V A N C E V A ® C O L O R
Vanceva® Color is an interlayer system made up of
base colors and a range of white interlayers that can be
combined to achieve varying layers of translucency and
color.
Here is how the system works:
1) Each Vanceva® base interlayer is designated by a
number or letter.
2) A single color can be selected or the base interlayers
can be stacked to provide the specific color and opacity
desired. Up to four interlayers* can be stacked between
two plies of glass within a laminated glass unit.
Each Vanceva® Color combination is given a four
digit code. The specific layers and order of the layers
determines the four digit code. This code can then be
used in your laminated glass specification.
If the desired color is achieved with less than four base
interlayers, a clear pvb is typically added to achieve .060"
thickness and is represented with a zero.
V A N C E V A ® C O L O R
*Vanceva® Color base interlayers are limited to three interlayers
when used in combination with a coating. Due to coating and
Vanceva Color base interlayer properties, a clear pvb interlayer
must be placed between the coating and interlayer.
1=Coral Rose 2=Aquamarine 3=Smoke Gray 4=Sahara Sun
9=Arctic Snow(translucent)
A=Cool White(translucent)
C=Deep Red D=True Blue
5=Ruby Red 6=Sapphire 7=Evening Shadow
8=Golden Light
E=Tangerine F=Polar White G=Absolute Black
H=Ocean Gray
2=Aquamarine 4=Sahara Sun Vanceva 0024
+ =
1=Coral Rose2=Aquamarine1=Coral Rose Vanceva 0121
+ + =M I C H A E L A . E V A N S C E N T E R
F O R H E A L T H S C I E N C E S ,
M A R I A N U N I V E R S I T Y
LOCATION: INDIANAPOLIS, INDIANA
GLASS TYPE: VUE1-50, VE1-2M, VE1-85, OPTIWHITETM/VE1-85,
VANCEVA COLOR SYSTEM
ARCHITECT: SCHMIDT ASSOCIATES; BSA LIFESTRUCTURES
GLAZING CONTRACTOR: HOOSIER GLASS CO. INC.
PHOTOGRAPHER: © COURTESY SCHMIDT ASSOCIATES
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L A M I N A T E D G L A S S A P P L I C A T I O N S
P R I M A R Y A P P L I C A T I O N S :
ACOUSTIC
Laminated glass reduces noise transmission due to the sound damping characteristics of the interlayer.
AESTHETIC
Laminated glass interlayers offer a selection of color and opacity not achievable with other glass products such as coatings, glass
substrates, silk-screen or spandrel glass. This is especially true with bright, vivid colors as well as opaque or translucent / frosted
aesthetic requirements.
BLAST MITIGATING
Viracon provides a variety of laminated glass options that help mitigate the effects of air-blast attacks. Important note: Laminated
glass is considered a component of the overall glazing system, therefore; the blast mitigating performance is also dependent upon
being installed into an adequately designed frame which is then anchored appropriately to the wall structure. Viracon recommends
the involvement of a blast consultant to verify the performance of the glass and framing system combination.
HURRICANE RESISTANT
Hurricane resistant laminates offered by Viracon meet or exceed stringent building code requirements of Florida and other coastal
regions. The laminated glass is a component of the overall glazing system and every Viracon hurricane resistant glass product has
passed the impact and cyclic wind pressure test as part of a complete glazing system. When choosing the right hurricane resistant
glass for your application, the following points must be evaluated:
1. Determine the applicable building code and test method
2. Determine the required design pressure/wind load
3. Qualify the missile requirement - large and/or small missile
4. Identify the largest glass size
L A M I N A T E D G L A S S A P P L I C A T I O N S
Interlayer Material Blast Mitigating
Hurricane Resistant
(small missile)
Hurricane Resistant
(large missile)
Ultraviolet Protection Aesthetic Acoustic Safety
Polyvinyl butyral (pvb) .030" X X X XPolyvinyl butyral (pvb) .060" X X X X XPolyvinyl butyral (pvb) .090" X X X X XSaflex® SilentGlass Acoustic .030 X X XSentryGlas® .060" X X X XSentryGlas® .090" X X X XSentryGlas® .100" X X X XStormGuard® .100" X X XSaflex® Storm .077" X X XLevel E - StormGuardTM X X XLevel E - SentryGlas® X X XVanceva® Color X X X
Primary Application
*This chart is a general reference to represent the primary use for each type of interlayer. I t does not indicate compliance for a specific application.
Laminated glass is a component of the overall glazing system therefore the performance in a specific application is dependent upon being installed into
an adequately designed frame which is then installed appropriately for the specific application.
VIRACON // 085
L A M I N A T E D G L A S S A P P L I C A T I O N S
5. If using a tested or certified framing system, confirm the laminated glass qualified with the particular manufacturer's
product
6. If not using a tested or certified frame, evaluate system design details, such as:
a. Glazing method - conventional or structurally glazed
b. Glass bite - Often large missile applications require a minimum edge engagement of 5/8" to augment performance.
c. Anchorage and hardware requirements - typically large missile applications require an enhanced design.
Hurricane resistant laminates offered by Viracon are Dade County approved and carry a component NOA.
For information on the current code requirements and test methods for a specific application and project location, please reference
the applicable standard or the International Building Code (Impact Provision).
1. Safety - Viracon's architectural laminated glass products with a minimum .030" pvb interlayer comply with ANSI
Z97.1-1984 and CPSC 16 CFR 1201, which are the industry safety standards for glazing materials.
2. Ultraviolet Protection – Laminated glass provides 99% UV light blockage at the wavelength range of
~300 - 380 nanometers
G E N E R A L F U N D I N G O F F I C E B U I L D I N G LOCATION: MIAMI, FLORIDA / / GLASS TYPE: VLE19-39, VLE26-39 / / ARCHITECT: NICHOLS BROSCH WURST WOLFE & ASSOCIATES
GLAZING CONTRACTOR: GLASSWALL, LLC / / PHOTOGRAPHER: © MIAMI IN FOCUS, INC.
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086 VIRACON // LAMINATED GLASS
S I Z E S
L A M I N A T E D G L A S S S I Z E S
NOW AVAILABLE IN OVERSIZED CONFIGURATIONS.
Glass sizing is based on 1/4” (6mm) to 3/8” (10mm) thickness for both interior and exterior lites in vertical applications.
Insulating Laminated and Laminated Insulating units > 70 square feet must be reviewed and approved by Viracon prior to receiving a quote.
Double laminated insulating units cannot exceed 40 square feet.
Configurations:
• > 50 square foot units must be heat treated
• Laminated insulating units with a coating on the #4 surface cannot exceed a 84” width or 144" height.
• Specialty laminates for hurricane applications have the following limitations:
– Saflex® Storm cannot exceed a 60" width or 144" height
– StormGuard® cannot exceed a 72" width or 144" height
– SentryGlas® cannot exceed a 72" width or 120" height
Components & Enhancements:
• Ceramic frit silk-screen or spandrel units cannot exceed an 84" width
• RoomSideTM Low-E coating cannot exceed 60" wide x 142" high or 72" wide x 120" high
• ClearPointTM units must be reviewed and approved by Viracon prior to receiving a quote
– Requires a minimum 24" width
– Cannot exceed a 72" width or 120" height when using a SentryGlas® interlayer
– Cannot exceed an 84" width or 144" height when using a PVB interlayer
• CyberShieldTM units must be reviewed and approved by Viracon prior to receiving a quote
– Requires a minimum 24" width
– Cannot exceed 60" wide x 144" high or 72" wide x 120" high
– CyberShield units cannot exceed 60 square feet
165” (4 ,191mm)
204” (5 ,182mm)
12” TO 84” (305mm TO 2,134mm)
12” TO 120” (305mm TO 3'048mm)
36” (914mm)
36” (914mm)
TO TO
CURRENT SIZING OVERSIZED GLASS AVAILABLE TO QUOTE TODAY. SHIPPING BEGINNING NOV 2017
Up To120 Square Feet
VIRACON // 087
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LOCATION: MINNEAPOLIS, MINNESOTA // GLASS TYPE: VE19-2M, VANCEVA COLOR SYSTEM
ARCHITECT: HDR INC. // GLAZING CONTRACTOR: EMPIREHOUSE INC. // PHOTOGRAPHER: © BALLOGGPHOTO.COM
T H E M O T H E R B A B Y C E N T E R
LOCATION: DAYTONA BEACH, FLORIDA / / GLASS TYPE: VLE1-70/PACIFICA / / ARCHITECT: LEO A DALY
GLAZING CONTRACTOR: WEST TAMPA GLASS / / PHOTOGRAPHER: © COURTESY WEST TAMPA GLASS, ROGER CAMPLA
C O L L E G E O F A R T S A N D S C I E N C E S , E M B R Y - R I D D L E A E R O N A U T I C A L U N I V E R S I T Y
MONOLITH
IC GLASS
VIRACON // 091
S T A N D S U P T O V I R T U A L L Y E V E R Y T H I N G .
I N C L U D I N G T H E D I S C E R N I N G E Y E S O F A R C H I T E C T S .
092 PRODUCT OVERVIEW
093 SIZES
MONOLITHIC GLASS HIGHLIGHTS
1 8 5 P O S T S T R E E T
LOCATION: SAN FRANCISCO, CALIFORNIA
GLASS TYPE: MONOLITHIC WITH CUSTOM SILK-SCREEN
ARCHITECT: BRAND + ALLEN ARCHITECTS
GLAZING CONTRACTOR: C S ERECTORS INC.
PHOTOGRAPHER: © VIRACON, DAVID MADRID
H O W A R D H U G H E S C E N T E R ( P R E V I O U S )
LOCATION: LOS ANGELES, CALIFORNIA
GLASS TYPE: VT1-20, VS1-08, VA1-18, VA1-35
ARCHITECT: DMJM ARCHITECTS
GLAZING CONTRACTOR: WALTERS & WOLF
PHOTOGRAPHER: © FLICKR
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M O N O L I T H I C G L A S S
Monolithic Glass is a single lite of glass that is typically used in the construction of the final Viracon fabricated product.
Viracon uses clear and tinted float glass substrates from all the major U.S. float glass manufacturing companies. Please note
that the only Viracon coatings that can be supplied on monolithic glass are Stainless Steel (VS) and Pewter (VP).
A monolithic glass product is enhanced for strength (see heat treatment), design (see silk-screen, spandrel and
DigitalDistinctionsTM) and aesthetics (see substrates and coatings). Additionally, monolithic glass is used to fabricate Viracon
insulating and laminated glass products (see insulating and laminated).
P R O D U C T O V E R V I E W
Single li te of glass that can be used alone or incorporated within Viracon fabricated insulating and laminated products.
VIRACON // 093
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S I Z E S
M O N O L I T H I C G L A S S S I Z E S
Monolithic units >70 square feet must be reviewed and approved by Viracon prior to receiving a quote.
Configurations:
• > 50 square foot units must be heat treated
Components & Enhancements:
• Ceramic frit silk-screen or spandrel units cannot exceed an 84” width
165” (4 ,191mm)
204” (5 ,182mm)
12” TO 96” (305mm TO 2,438mm)
12” TO 120” (305mm TO 3'048mm)
36” (914mm)
36” (914mm)
TO TO
CURRENT SIZING OVERSIZED GLASS AVAILABLE TO QUOTE TODAY. SHIPPING BEGINNING MAY 2017
Up To 120 Square Feet
NOW AVAILABLE IN OVERSIZED CONFIGURATIONS.Glass sizing is based on 1/4" (6mm) to 3/8" (10mm) thickness for both interior and exterior lites in vertical applications.
R E S O
URCES
VIRACON // 097
T H E B E A U T I F U L , U N I F O R M F O U N D A T I O N O N W H I C H L A N D M A R K G L A S S P R O J E C T S A R E B U I L T .
O N E 5 7
LOCATION: NEW YORK, NEW YORK
GLASS TYPE: VRE13-59, VRE19-59
ARCHITECT: ATELIER CHRISTIAN DE PORTZAMPARC (DESIGN) ;
SLCE ARCHITECTS (ARCHITECT OF RECORD)
GLAZING CONTRACTOR: PERMASTEELISA NORTH AMERICA CORP.
PHOTOGRAPHER: © GREG WEST
098 PERFORMANCE DATA
099 GLASS SAMPLES
099 EDUCATIONAL RESOURCES
100 GLASS SPECIFICATION
116 QUALITY STANDARDS
120 GLAZING GUIDELINES
123 GLOSSARY
128 WARRANTY
129 TRADEMARKS & PATENTS
130 PHOTOGRAPHY INDEX
RESOURCES HIGHLIGHTS
M I C H A E L A . E V A N S C E N T E R F O R H E A L T H
S C I E N C E S , M A R I A N U N I V E R S I T Y ( P R E V I O U S )
LOCATION: INDIANAPOLIS, INDIANA
GLASS TYPE: VUE1-50, VE1-2M, VE1-85, OPTIWHITETM/VE1-85, VANCEVA COLOR SYSTEM
ARCHITECT: SCHMIDT ASSOCIATES; BSA LIFESTRUCTURES
GLAZING CONTRACTOR: HOOSIER GLASS CO. INC.
PHOTOGRAPHER: © COURTESY SCHMIDT ASSOCIATES
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P E R F O R M A N C E D A T A
S O L A R A N D O P T I C A L P E R F O R M A N C E D ATA
The 'Search by Performance' functionality at viracon.com allows you to find products to meet desired performance targets.
• If you are searching for a specific product using our nomenclature (see page 006) enter it in the 'Search Product Code'
box. If you do not have a specific product in mind, leave the box blank.
• The configuration boxes allow you to select multiple options by holding down Ctrl and selecting all that apply.
• Selection bars have been developed for each of the four most common performance value types; Visible Light Transmission
(VLT), Solar Heat Gain Coefficient (SHGC), Exterior Reflectance, U-Value. Using the box at each end, drag toward the center
to adjust the range to match your performance target. This can be done with one or all four.
• The results list populates at the bottom of the page based on the selections noted above. It can be sorted by clicking on the
symbol next to each heading. Specific items can be moved to a compare table utilizing 'Add to Compare' at the very right.
VIRACON // 099
G L A S S S A M P L E S
G L A S S S A M P L E S & E D U C A T I O N A L R E S O U R C E S
Glass samples are available for visual representation of Viracon products. To request samples, contact Viracon at
800.533.2080 or visit viracon.com.
E D U C A T I O N A L R E S O U R C E S
We understand there are a number of factors and considerations that must be made when selecting glass products for a
building design. Viracon has provided design and educational resources to assist with this process.
• AIA Presentations – Viracon is an AIA/CES Approved Provider and offers interactive and in person presentations for architects.
• BIM Library – We’ve created a Viracon library to simplify the process of adding our glass products into Revit Building
Information Models.
• Glazing Guidelines – Documents and information regarding Viracon's guidelines for glazing, glass handling and storage,
maintenance and cleaning and glass breakage. See page 120.
• Green Design / LEED – Learn how Viracon products contribute to LEED (Leadership in Energy and Environmental Design)
Rating Systems.
• Specification – Using CSI’s MasterFormat, our recommended 08 80 00 specification provides a comprehensive list of
items to include when specifying glass products. See page 100.
• Tech Talks – See viracon.com for specific and detailed documents covering the following topics:
– Bird Friendly Glass
– Ceramic Frit and Ink Visual Characteristics
– Field-Applied Coatings and Films on Glass
– Glass and Electronic Evesdropping Tech Talk
– Glass Staining
– Heat Soak Testing
– Insulating Glass Sealant Visual Characteristics
– Quench Pattern Characteristics
– Reflective Glass
– Thermal Stress Breakage
– The Role of Reflectivity in Glass
– Viewing Windows for Swimming Pools and Aquariums
SAMPLES AVAILABLE:
Custom 12" x 12" glass samples specific to your request
Glass Sample Kits:
• Viracon Insulating Low-E Kit
- Contains 8 samples - 1” (5” x 7”) Insulating units with black spacers and black silicone
• Viracon DigitalDistinctionsTM Kit
- Contains 16 samples - 1/4” (4” x 6”) Monolithic Glass
• ViraspanTM Ceramic Frit Spandrel and Silk-screen Kit
- Contains 16 samples - 1/4” (4” x 6”) Monolithic Glass
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G L A S S S P E C I F I C A T I O N
R E C O M M E N D E D A R C H I T E C T U R A L G L A S S S P E C I F I C A T I O N
The specification on the following pages is written according to the Construction Specifications Institute (CSI) 3-Part Format.
The specification can be customized for your project by including details for the products you are specifying in Article 2.6
Product Schedule. The blue text below is intended to be altered to identify the specific product you selected. Please contact
the Architectural Design team at 800.533.2080 or email [emailprotected] with any glass specification questions.
P L E A S E S E E E X A M P L E B E L O W
STEP 1. Select a product: For Example - VRE6-54 Insulating Glass.
STEP 2. Find the product type in Article 2.6 Product Schedule.
A. Insulating Coated Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted} {Gas – argon or air} filled
d. Silicone: {gray or black}
e. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
2. Performance Requirements
a. Visible Light Transmittance: { }%
b. Exterior Reflectance: { }%
c. Winter U-Value: { }
d. Summer U-Value: { }
e. Shading Coefficient: { }
f. Solar Heat Gain Coefficient: { }
g. Light to Solar Gain Ratio: { }
STEP 3. Insert VRE6-54 into your specification including all of the details needed to manufacture the glass unit as well as the solar performance requirements.
A. Insulating Coated Glass:
1. 1” VRE6-54 Insulating Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: 1/4" Blue-green HS
b. Coating: VRE-54 on #2 Surface
c. Space: 1/2" – aluminum, black painted, air filled
d. Silicone: black
e. Interior Glass Ply: 1/4” Clear HS
2. Performance Requirements
a. Visible Light Transmittance: 41%
b. Exterior Reflectance: 24%
c. Winter U-Value: 0.30
d. Summer U-Value: 0.27
e. Shading Coefficient: 0.29
f. Solar Heat Gain Coefficient: 0.25
g. Light to Solar Gain Ratio: 1.63
This Recommended Architectural Glass Specification is offered to
assist in specifying Viracon Fabricated Glass Products. Viracon
does not assume any responsibili ty for the adequacy of this
specification for a particular application. The design professional
must confirm applicable code and design.
VIRACON // 101
G L A S S S P E C I F I C A T I O N
D I V I S I O N 0 8 – O P E N I N G S
0 8 8 0 0 0 G L A Z I N G
P A R T 1 – G E N E R A L
1.1 SUMMARY
A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and
Division 01 Specification Sections apply to this Section.
B. Section Includes:
1. Transparent and translucent glass glazing for general and special purpose applications including;
coated, float, heat-strengthened, impact resistant, insulating, low emissivity, laminated, spandrel
and tempered glass.
2. Work Results: Manufacture, handle, deliver and install glazing systems as shown on the
architectural drawings or as otherwise specified and in accordance with the requirements of the
contract documents.
1.2 REFERENCES
A. Abbreviations and Acronyms:
1. AAMA American Architectural Manufacturers Association
2. ANSI American National Standards Institute
3. ASTM Formerly the American Society for Testing and Materials
4. CPSC Consumer Products Safety Commission
5. FT Fully Tempered
6. GANA Glass Association of North America
7. HS Heat-strengthened
8. ICC International Code Council
9. IGCC Insulating Glass Certification Council
10. IGMA Insulating Glass Manufacturers Alliance
11. LBNL Lawrence Berkeley National Laboratories
12. LEED Leadership in Energy & Environmental Design
13. Low-E Low emissivity
14. LSG Light to Solar Gain
15. NFRC National Fenestration Rating Council
16. SHGC Solar Heat Gain Coefficient
17. SC Shading Coefficient
18. USGBC The U.S. Green Building Council
19. VLT Visible Light Transmittance
Project Name, Location and NumberIssue Date: mm/dd/yyyy
08 80 00 Glazing - Page Number
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B. Definitions:
1. Deterioration of Coated Glass: Defects developing from normal use that are attributed to the
manufacturing process and not to causes other than glass breakage and practices for maintaining
and cleaning coated glass contrary to manufacturer’s written instructions. Defects include peeling,
cracking and other indications of deterioration in metallic coating.
2. Deterioration of Insulating Glass: Failure of the hermetic seal under normal use that is attributed
to the manufacturing process and not to causes other than glass breakage and practices for
maintaining and cleaning insulating glass contrary to manufacturer’s written instructions. Evidence
of failure is the obstruction of vision by dust, moisture or film on interior surfaces of glass.
3. Deterioration of Laminated Glass: Defects developed from normal use that are attributed to the
manufacturing process and not to causes other than glass breakage and practices for maintaining
and cleaning laminated glass contrary to manufacturer’s written instructions. Defects include edge
separation, delaminating material obstructing vision through glass and blemishes exceeding those
allowed by referenced laminated glass standards.
4. Interspace or Airspace: The space between lites of any insulating glass unit that contains
dehydrated air or a specified gas.
5. Manufacturer: A firm that produces primary glass or fabricated glass products as defined in
referenced glazing publications.
C. Reference Standards: This section does not require compliance with standards, but is merely a listing of
those used. If compliance is required, statements will be included in the appropriate Section.
1. ASTM C 1036 Standard Specification for Flat Glass
2. ASTM C 1048 Standard Specification for Heat-Strengthened and Fully Tempered Flat Glass
3. ASTM C 1172 Standard Specification for Laminated Architectural Flat Glass
4. ASTM C 1376 Standard Specification for Pyrolytic and Vacuum Deposition Coatings on Flat Glass
5. ASTM E 2190 Standard Specification for Insulating Glass Unit Performance and Evaluation (replaces
ASTM E773, E774 CBA, CAN / CGSB 12.8)
6. ASTM E 546 Standard Test Method for Frost/Dew Point of Sealed Insulating Glass Units
7. ASTM E 576 Standard Test Method for Frost/Dew Point of Sealed Insulating Glass Units in the Vertical Position
8. ASTM E 1300 Standard Practice for Determining Load Resistance of Glass in Buildings
9. ASTM C 1349 Standard Specification for Architectural Flat Glass Clad Polycarbonate
9. ASTM F 3057 Standard Test Method for Electromagnetic Shielding Effictiveness of Glazings
10. ANSI Z97.1 Performance Specifications and Methods of Test for Safety Glazing Materials Used in
Buildings
11. BS EN 14179 Glass in building - Heat-soaked thermally-toughened soda lime silicate safety glass
12. CPSC 16 CFR 1201 Safety Standard for Architectural Glazing Materials
G L A S S S P E C I F I C A T I O N
Project Name, Location and NumberIssue Date: mm/dd/yyyy
08 80 00 Glazing - Page Number
VIRACON // 103
1.3 SUBMITTALS
A. Shop Drawings: Show details of each type of glazing system in conjunction with the framing system indicating
type of glass, sizes, shapes, glazing material and quantity. Show details indicating glazing material, glazing
thickness, bite on the glass and glass edge clearance.
B. Samples: Submit 12-inch (305 mm) long samples of each type of glass indicated except for clear monolithic
glass products, and 12-inch (305 mm) long samples of each color required, except black, for each type of
sealant or gasket exposed to view.
C. Test and Evaluation Reports: Glazing contractor shall obtain compatibility and adhesion test reports from
sealant manufacturer indicating that glazing materials were tested for compatibility and adhesion with
glazing sealant as well as other glazing materials including insulating units.
D. Manufacturer Reports: Submit Glass Fabricator’s Shop Drawing Review indicating compliance with glazing
standards established by the Glass Association of North America (GANA). Submittal to include thermal stress
and structural load analysis of the proposed glass types, configuration and sizes.
E. Sustainable Design Submittals: Submit manufacturer’s documentation verifying product content, origin
or other attributes for projects requiring special sustainability provisions, to meet the USGBC’s LEED
requirements or other sustainable goals.
F. Warranties:
1. Provide a written 10-year warranty from date of manufacture for sputter coated glass. Warranty
covers deterioration due to normal conditions of use and not to handling, installing, and cleaning
practices contrary to the glass manufacturer’s published instructions.
2. Provide a written 10-year warranty from date of manufacture for laminated glass. Warranty covers
deterioration due to normal conditions of use and not to handling, installing, and cleaning practices
contrary to the glass manufacturer’s published instructions.
3. Provide a written 10-year warranty from date of manufacture for insulating glass. Warranty covers
deterioration due to normal conditions of use and not to handling, installing, protecting and
maintaining practices contrary to the glass manufacturer’s published instructions.
4. Provide a written 10-year warranty from date of manufacture for Viraspan ceramic frit. Warranty
covers deterioration due to normal conditions of use and not to handling, installing, and cleaning
practices contrary to the glass manufacturer’s published instructions.
5. Provide a written 5-year warranty from date of manufacture for fully tempered glass that has been
Heat Soaked. Warrants that heat soaked tempered glass will not break spontaneously as a result of
Nickel Sulfide (NiS) inclusions at a rate exceeding 0.5% (5/1000) for a period of five years from the
date of manufacture.
6. Provide a written 5-year warranty from date of manufacture for DigitalDistinctionsTM digitally printed
ceramic ink. Warranty covers deterioration due to normal conditions of use and not to handling,
installing, and cleaning practices contrary to the glass manufacturer’s published instructions.
Project Name, Location and NumberIssue Date: mm/dd/yyyy
08 80 00 Glazing - Page Number
G L A S S S P E C I F I C A T I O N
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1.4 QUALITY ASSURANCE
A. Qualifications:
1. Manufacturers: Fabrication processes, including low emissivity and reflective coatings, insulating,
laminated, silk-screening and tempering shall be manufactured by a single manufacturer with a
minimum of ten (10) years of fabrication experience and meet ANSI / ASQC 9002 1994.
B. Mock-ups: Before glazing, build mockups for each glass product indicated in section 2.5 Product
Schedule to verify selections and to demonstrate aesthetic effects and qualities of materials and
execution.
1. Construction: Build mockups with glass and glazing systems specified for the project,
including typical lite size, framing systems and glazing methods.
2. Scheduling: Notify architect seven days in advance of dates and times when mockups will
be available for viewing.
3. Quality Assurance: Maintain mockups during construction in an undisturbed condition as
a standard for judging the completed work. Accepted mockups may become part of the
completed work if undisturbed at the time of substantial completion.
C. Publications: Comply with recommendations in the publications below, except where more stringent
requirements are indicated. Refer to these publications for glazing terms not otherwise defined in
this section or in Article 1.2 References.
1. GANA Glazing Manual
2. GANA Engineering Standards Manual
3. GANA Laminated Glazing Reference Manual
1.5 DELIVERY, STORAGE AND HANDLING
A. Storage and Handling Requirements:
1. Protect glass from edge damage during handling. For insulating units exposed to substantial
altitude changes, comply with insulating glass manufacturers written recommendations for venting
and sealing to avoid hermetic seal ruptures.
2. Storage and Protection: Protect glazing materials according to manufacturer’s written instructions
and as needed to prevent damage to glass and glazing materials from condensation, temperature
changes, direct exposure to sun or other causes.
1.6 SITE CONDITIONS
A. Ambient Conditions: Do not proceed with glazing when ambient and substrate temperature conditions are
outside limits permitted by the glazing material manufacturers and when glazing channel substrates are wet
from rain, frost, condensation or other causes.
1. Do not install liquid glazing sealants when ambient and substrate temperature conditions are
outside limits permitted by glazing sealant manufacturer or below 40°F (4.4°C).
G L A S S S P E C I F I C A T I O N
Project Name, Location and NumberIssue Date: mm/dd/yyyy
08 80 00 Glazing - Page Number
VIRACON // 105
P A R T 2 – P R O D U C T S
2.1 MANUFACTURERS
A. Source Listing: Acceptable source, Viracon, Inc.
B. Substitution Limitations: In some cases, it may be necessary to use the specified product without substitution,
either to match work-in-place or to match similar products used in another facility or for another reason
determined by the owner. Confirm constraints with the Owner or other Authority Having Jurisdiction.
C. Product Options: Obtain glass and glazing materials from one source for each product indicated. Coatings and
finished assemblies, such as insulating units and laminated units, to be manufactured by the same fabricator in
order to have a common source of warranty.
2.2 DESCRIPTION
A. Provide glazing systems capable of withstanding normal thermal movements, wind loads and impact loads,
without failure, including loss due to defective manufacture, fabrication and installation; deterioration of glazing
materials; and other defects in construction.
2.3 PERFORMANCE / DESIGN CRITERIA
A. Glass Strength: Analysis shall comply with ASTM E 1300 Determining Load Resistance of Glass in Buildings.
Provide glass products in the thickness and strengths (annealed or heat-treated) required to meet or exceed the
following criteria based on project loads and in-service conditions.
1. Minimum thickness of annealed or heat-treated glass products to be selected so the worst case probability
of failure does not exceed the following:
a. 8 breaks per 1000 for glass installed vertically or not 15 degrees or more from the vertical plane
and under wind action.
b. 1 break per 1000 for glass installed 15 degrees or more from the vertical plane and under action of
wind and/or snow.
2. Deflection must be limited to prevent disengagement from the frame and be less than or equal to 1” (25mm).
B. Thermal and Optical Performance: Provide glass products with performance properties specified in 2.5 Product
Schedule. Performance properties to be manufacturer’s published data as determined according to the following
procedures:
1. Center of glass U-Value: NFRC 100 methodology using LBNL WINDOW 7 computer program.
2. Center of glass solar heat gain coefficient: NFRC 200 methodology using LBNL-35298 WINDOW 7 computer
program.
3. Solar optical properties: NFRC 300
Project Name, Location and NumberIssue Date: mm/dd/yyyy
08 80 00 Glazing - Page Number
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2.4 FABRICATION
A. Flat Glass:
1. Shall comply with ASTM C1036 Standard Specification for Flat Glass, Type 1, Class 1 (clear) or Class 2
(tinted, heat-absorbing and light reducing) and Quality q3
2. ASTM C 1048 Heat Treated Flat Glass, Kind HS or FT (remove ASTM Standard C 1048 if annealed glass),
Condition A (uncoated), B (spandrel glass, one surface coated), or C (other coated glass
a. Heat Treated Flat Glass to be by horizontal (roller hearth) process with inherent rollerwave
distortion parallel to the bottom edge of the glass as installed.
b. Maximum peak to valley rollerwave 0.003" (0.08mm) in the central area and 0.008" (0.20mm) within
10.5" (267mm) of the leading and trailing edge
c. For clear or low-iron glass 1/4" to 3/8" thick without ceramic frit or ink, maximum + or – 100 mD
(millidiopter) over 95% of the glass surface.
d. Maximum bow and warp 1/32" per lineal foot (0.79mm).
e. All tempered architectural safety glass shall conform with ANSI Z97.1 and CPSC 16 CFR 1201.
f. For all fully tempered glass, provide heat soak testing conforming to EN14179 which includes a 2
hour dwell at 290°C±10°C.
B. Insulating Glass:
1. Shall comply with ASTM E 2190 Standard Specification for Insulating Glass Unit Performance and Evaluation.
a. Units shall be certified for compliance by the IGCC in accordance with the above ASTM test method.
2. The unit overall thickness tolerance shall be -1/16" (1.59mm) / +1/32" (0.79mm) for a 1" two ply insulating
unit. Unit constructed with patterned or laminated glass shall be +/-1/16” (1.59mm).
3. Shall comply with ASTM E 546 Standard Test Method for Frost Point of Sealed Insulating Glass Units
4. Shall comply with ASTM E 576 Standard Test Method for Frost Point of Sealed Insulating Glass Units in the
Vertical Position
5. Sealed Insulating Glass Units to be double sealed with a primary seal of polyisobutylene and a secondary
seal of silicone.
a. The minimum thickness of the secondary seal shall be 1/16" (1.59mm).
b. The target width of the primary seal shall be 5/32" (3.97mm).
c. There shall be no voids or skips in the primary seal.
d. Up to a maximum of 3/32" of the airspacer may be visible above the primary polyisobutylene
sealant.
e. Gaps or skips between primary and secondary sealant are permitted to a maximum width of
1/16" (1.59mm) by maximum length of 2" (51mm) with gaps separated by at least 18" (457mm).
Continuous contact between the primary seal and the secondary seal is desired.
6. To provide a hermetically sealed and dehydrated space, lites shall be separated by a spacer with bent
corners and straight butyl injected zinc plated steel straight key joints.
G L A S S S P E C I F I C A T I O N
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C. Laminated Glass:
1. Shall comply with ASTM C1172 Standard Specification for Laminated Architectural Flat Glass.
2. All laminated architectural safety glass shall conform with ANSI Z97.1 and CPSC 16 CFR 1201.
3. Laminated Glass products to be fabricated free of foreign substances and air or glass pockets in autoclave
with heat plus pressure.
D. Coated Vision Glass:
1. Shall comply with ASTM C 1376 Standard for Pyrolytic and Vacuum Deposition Coatings on Glass
2. Coated products to be magnetically sputtered vacuum deposition (MSVD)
3. Edge Deletion – When low-e coatings are used within an insulating unit, coating shall be edge deleted to
completely seal the coating within the unit.
a. The edge deletion should be uniform in appearance (visually straight) and remove 95% of the coating.
E. Ceramic Coated Glass Products:
1. Shall comply with ASTM C 1048 Standard Specification for Heat-Treated Flat Glass – Kind HS, Kind FT
Coated and Uncoated, Condition B
2. Silk-screen pattern should be no more than 0.0625” (1.59 mm) off parallel from locating glass edge and no
more than 0.125” (3.18 mm) from edges other than locating glass edge.
3. Silk-screen pattern shall have a maximum of a 0.03125” (0.79 mm) variation in dot, hole or line location.
4. Digital print should be no more than 1/16” (1.6 mm) off parallel from locating glass edge and no more than
1/8” (3 mm) from edges other than locating glass edge.
5. Digital print shall have a maximum of a 1/32” (0.8 mm) variation in dot, hole or line location.
6. Digital print may have an indefinite border of up to 1/32” (0.8 mm).
2.5 ACCESSORIES
A. Glazing Materials: Select glazing sealants, tapes, gaskets and additional glazing materials of proven compatibility
with other materials they will contact, including glass products, seals of insulating glass units and glazing channel
substrates, under conditions of installation and service, as demonstrated by testing and field experience.
1. Setting blocks to be 100% silicone with a durameter hardness of 85±5.
2.6 PRODUCT SCHEDULE
All products shall comply with ASTM Standards and requirements in Article 2.3 Materials.
A. Insulating Coated Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted}
{Gas – argon or air} filled
d. Silicone: {gray or black}
e. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
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2. Performance Requirements
a. Visible Light Transmittance: { }%
b. Exterior Reflectance: { }%
c. Winter U-Value: { }
d. Summer U-Value: { }
e. Shading Coefficient: { }
f. Solar Heat Gain Coefficient: { }
g. Light to Solar Gain Ratio: { }
B. Laminated Coated Glass:
1. {Overall Thickness} {Product Number, ex: VLE1-57} Laminated Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Interlayer: {Thickness} {Type – pvb, StormGuard, etc}
d. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
2. Performance Requirements
a. Visible Light Transmittance { }%
b. Exterior Reflectance { }%
c. Winter U-Value { }
d. Summer U-Value { }
e. Shading Coefficient { }
f. Solar Heat Gain Coefficient { }
g. Light to Solar Gain Ratio { }
C. Monolithic Reflective Glass:
1. {Overall Thickness} {Product Number, ex: VS1-14} Monolithic Reflective Glass as manufactured by Viracon.
a. Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
2. Performance Requirements
a. Visible Light Transmittance: { }%
b. Exterior Reflectance: { }%
c. Winter U-Value: { }
d. Summer U-Value: { }
e. Shading Coefficient: { }
f. Solar Heat Gain Coefficient: { }
g. Light to Solar Gain Ratio: { }
G L A S S S P E C I F I C A T I O N
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D. Insulating Laminated Coated Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Laminated Coated Glass as manufactured by
Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted}
{Gas – argon or air} filled
d. Silicone: {gray or black}
e. Interior Glass Ply 1: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
f. Interlayer: {Thickness} {Type – pvb, StormGuard, etc}
g. Interior Glass Ply 2: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
2. Performance Requirements
a. Visible Light Transmittance { }%
b. Exterior Reflectance { }%
c. Winter U-Value { }
d. Summer U-Value { }
e. Shading Coefficient { }
f. Solar Heat Gain Coefficient { }
g. Light to Solar Gain Ratio { }
E. Laminated Insulating Coated Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Laminated Insulating Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply 1: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Interlayer: {Thickness} {Type – pvb, StormGuard, etc}
c. Exterior Glass Ply 2: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
d. Coating: {Coating} on #4 Surface
e. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted}
{Gas – argon or air} filled
f. Silicone: {gray or black}
g. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
2. Performance Requirements
a. Visible Light Transmittance { }%
b. Exterior Reflectance { }%
c. Winter U-Value { }
d. Summer U-Value { }
e. Shading Coefficient { }
f. Solar Heat Gain Coefficient { }
g. Light to Solar Gain Ratio { }
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F. Triple Insulating Coated Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Triple Insulating Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Spaces: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black
painted} {Gas – argon or air} filled
d. Silicone: {gray or black}
e. Middle Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
f. Coating: VE-85 on #4 Surface
g. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
2. Performance Requirements
a. Visible Light Transmittance: { }%
b. Exterior Reflectance: { }%
c. Winter U-Value: { }
d. Summer U-Value: { }
e. Shading Coefficient: { }
f. Solar Heat Gain Coefficient: { }
g. Light to Solar Gain Ratio: { }
G. Insulating Coated Spandrel Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Coated Spandrel Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted}
{Gas – argon or air} filled
d. Silicone: {gray or black}
e. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
f. Ceramic Frit: {Frit Color – ex: V933 Warm Gray} on #4 Surface
2. Performance Requirements
a. Winter U-Value: { }
b. Summer U-Value: { }
H. Viraspan™ Insulating Coated Silk-screened Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Coated Silk-screened Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Ceramic Frit: {Frit Color – ex: V933 Warm Gray} on #2 Surface
d. Pattern: {Viraspan Design, Viraspan Design-Plus or Viraspan Design-Original} {Screen #} {Pattern – dots,
lines, custom, etc.}
G L A S S S P E C I F I C A T I O N
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e. Pattern Orientation: {Orientation - lines vertical, horizontal, etc.}
f. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted}
{Gas – argon or air} filled
g. Silicone: {gray or black}
h. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
2. Performance Requirements
a. Visible Light Transmittance: { }%
b. Exterior Reflectance: { }%
c. Winter U-Value: { }
d. Summer U-Value: { }
e. Shading Coefficient: { }
f. Solar Heat Gain Coefficient: { }
g. Light to Solar Gain Ratio: { }
I. Viraspan™ Monolithic Spandrel Glass:
1. {Overall Thickness} Viraspan Monolithic Spandrel Glass as manufactured by Viracon.
a. Glass Ply: {Thickness} {Color} {Heat Treatment - HS or FT}
b. Ceramic Frit: {Frit Color – ex: V933 Warm Gray} on #2 Surface
2. Performance Requirements
a. Winter U-Value { }
b. Summer U-Value { }
J. Viraspan™ Monolithic Silk-screened Glass:
1. {Overall Thickness} Viraspan Monolithic Silk-screened Glass as manufactured by Viracon.
a. Glass Ply: {Thickness} {Color} {Heat Treatment - HS or FT}
b. Ceramic Frit: {Frit Color – ex: V933 Warm Gray} on #2 Surface
c. Pattern: {Viraspan Design, Viraspan Design-Plus or Viraspan Design-Original} {Screen #} {Pattern –
dots, lines, custom, etc.}
d. Pattern Orientation: {Orientation - lines vertical, horizontal, etc.}
2. Performance Requirements
a. Visible Light Transmittance { }%
b. Exterior Reflectance { }%
c. Winter U-Value { }
d. Summer U-Value { }
e. Shading Coefficient { }
f. Solar Heat Gain Coefficient { }
g. Light to Solar Gain Ratio { }
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K. ClearPointTM Insulating Point Supported Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness, must be 3/8” or greater} {Color} Heat Treatment FT – Heat Soaked
b. Coating: {Coating} on #2 Surface
c. Exterior hole to be countersunk
d. Space: 1/2" (13.2 mm) black air filled space
e. Silicone: {gray or black}
f. Interior Glass Ply: {Thickness, must be 1/4” or greater} {Color} Heat Treatment FT – Heat Soak
2. Performance Requirements
a. Visible Light Transmittance { }%
b. Exterior Reflectance { }%
c. Winter U-Value { }
d. Summer U-Value { }
e. Shading Coefficient { }
f. Solar Heat Gain Coefficient { }
g. Light to Solar Gain Ratio { }
L. ClearPointTM Insulating Laminated Point Supported Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Laminated Coated Glass as manufactured by
Viracon.
a. Exterior Glass Ply: {Thickness, must be 3/8” or greater} {Color} Heat Treatment FT – Heat Soaked
b. Coating: {Coating} on #2 Surface
c. Exterior hole to be countersunk
d. Space: 1/2" (13.2 mm) black air filled space
e. Silicone: {gray or black}
f. Interior Glass Ply 1: {Thickness, must be 1/4” or greater} {Color} Heat Treatment FT – Heat Soak
g. Interlayer: {Thickness} {Type – pvb, StormGuard, etc}
h. Interior Glass Ply 2: {Thickness, must be 1/4” or greater} {Color} Heat Treatment FT – Heat Soak
2. Performance Requirements
a. Visible Light Transmittance { }%
b. Exterior Reflectance { }%
c. Winter U-Value { }
d. Summer U-Value { }
e. Shading Coefficient { }
f. Solar Heat Gain Coefficient { }
g. Light to Solar Gain Ratio { }
G L A S S S P E C I F I C A T I O N
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M. DigitalDistinctionsTM Insulating Digital Printed Glass:
1. {Overall Thickness} Insulating Digital Printed Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - HS or FT}
b. Digital Print File: {File # – ex: D5555} or {Custom artwork to be supplied by architect} on #2 Surface
c. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted}
{Gas – argon or air} filled
d. Silicone: {gray or black}
e. Interior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
2. Performance Requirements
a. Visible Light Transmittance: { }%
b. Exterior Reflectance: { }%
c. Winter U-Value: { }
d. Summer U-Value: { }
e. Shading Coefficient: { }
f. Solar Heat Gain Coefficient: { }
g. Light to Solar Gain Ratio: { }
N. CyberShield™ Insulating Laminated RF Shielding Glass:
1. {Overall Thickness} {Product Number, ex: VRE1-46} Insulating Laminated Coated Glass as manufactured by Viracon.
a. Exterior Glass Ply: {Thickness} {Color} {Heat Treatment - AN, HS or FT}
b. Coating: {Coating} on #2 Surface
c. Space: {Thickness} {Material – aluminum, stainless steel, etc.} {finish – mill finish or black painted}
{Gas – argon or air} filled
d. Silicone: {gray or black}
e. Interior Glass Ply 1: 1/4" Clear {Heat Treatment - HS or FT}
f. Coating: Pilkington DATASTOP™ on #4 Surface
g. Interlayer: {Thickness, must be greater than .060} {Type – pvb, StormGuard, etc}
h. Interior Glass Ply 2: 1/4" Clear {Heat Treatment - HS or FT}
i. Coating: Pilkington DATASTOP™ on #6 Surface
2. Performance Requirements
a. Visible Light Transmittance { }%
b. Exterior Reflectance { }%
c. Winter U-Value { }
d. Summer U-Value { }
e. Shading Coefficient { }
f. Solar Heat Gain Coefficient { }
g. Light to Solar Gain Ratio { }
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G L A S S S P E C I F I C A T I O N
P A R T 3 – E X E C U T I O N
3.1 EXAMINATION
A. Verification of Conditions:
1. Verify prepared openings for glazing are correctly sized and within tolerance. Verify that the minimum
required face and edge clearances are being followed.
2. Verify that a functioning weep system is present.
3. Do not proceed with glazing until unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Surface Preparation: Immediately before glazing, clean glazing channels and other framing members receiving
glass. Remove coatings not firmly bonded to substrates.
B. Demolition / Removal: Remove and replace glass that is broken, chipped, cracked or damaged in any way.
3.3 INSTALLATION
A. Install products using the recommendations of manufacturers of glass, sealants, gaskets and other glazing
materials including those in the GANA Glazing Manual except where more stringent requirements are indicated.
B. Prevent glass from contact with contaminating substances that result from construction operations such as weld
splatter, fire-safing or plastering.
3.4 CLEANING
A. Clean excess sealant or compound from glass and framing members immediately after application using
solvents or cleaners recommended by manufacturers.
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LOCATION: CHANTILLY, VIRGINIA / / GLASS TYPE: VRE1-46, VE1-85 / / ARCHITECT: KGD ARCHITECTURE
GLAZING CONTRACTOR: HARMON INC. / / PHOTOGRAPHER: © COURTESY JAMES G. DAVIS CONSTRUCTION
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Q U A L I T Y S T A N D A R D S
Q U A L I T Y S T A N D A R D S
I N S U L A T I N G G L A S S U N I T S Viracon's insulating glass units are Insulating Glass Certification Council (IGCC) certified to ASTM E2190 Standard
Specification for Insulating Glass Unit Performance and Evaluation.
L A M I N A T E D G L A S S U N I T SViracon's laminated glass units with a minimum .030" pvb interlayer comply with ANSI Z97.1 and CPSC 16 CFR 1201, which
are the industry safety standards for glazing materials. In addition, Viracon’s laminated glass units comply with ASTM 1172
Standard Specification for Laminated Architectural Flat Glass.
EDGE BLUSHING In both structural and butt glazed applications, silicone sealants may come in contact with the polyvinyl
butyral (pvb) interlayer used in laminated glass. When silicone contacts the laminated glass edge, a cosmetic blushing of the
pvb interlayer will occur over time. It generally begins as a small bubble formation at the contacted edge, which then grows
to form a limited unbonded area at the glass edge. This reaction is limited and generally does not exceed more than 3/8" (9.5
mm). Edge blushing may be visible however does not affect the structural integrity of the laminated glass with respect to its
ability to resist uniform loads.
C O A T E D G L A S S - L O W - E O R R E F L E C T I V EViracon's coated glass products comply with ASTM Standard C1376 Standard Specification for Pyrolytic and Vacuum Deposition
Coatings on Flat Glass.
INSPECTION GUIDELINES
PINHOLES Inspect glass from a distance of 10 ft. (3 m) in transmission, at a viewing angle of 90° to the specimen, against a
bright uniform background. If a pinhole is readily apparent, the following criteria apply: Pinholes larger than 1/16" (1.6 mm)
in diameter are not allowed in 80 percent of the central glass area. Pinholes larger than 3/32" (2.4 mm) are not allowed in the
outer 20 percent of the glass area. No more than two readily apparent blemishes are allowed in a 3" (75 mm) diameter circle
and no more than five readily apparent blemishes are allowed in a 12" (300 mm) diameter circle.
UNIFORMITY When viewing coated glass from a minimum distance of 10 ft. (3 m), color variation may occur from one unit to
another. This can be caused by variations within the float glass substrate and normal production variations, and this is not
considered a defect. All Viracon commercial glass products conform to industry color standards.
DISTORTION Various factors involved in heat processing, insulating air spacers and frame binding may distort reflected
objects viewed on the glass surface. These are not considered defects of the coated glass or the final fabricated product.
SCRATCHES Inspect glass from a distance of 10 ft. (3 m). Scratches up to 2" (50 mm) are allowed in 80 percent central glass
area, and scratches up to 3" (75 mm) are allowed in the outer area. Concentrated scratches or abraded areas are not allowed.
VIRACON // 117
Q U A L I T Y S T A N D A R D S
D I G I T A L D I S T I N C T I O N S T M G L A S SViracon's DigitalDistinctionsTM glass products comply with ASTM C1048 Standard Specification for Heat-Strencthened and Fully
Tempered Glass - Kind HS, Kind FT Coated and Uncoated, Condition B.
INSPECTION GUIDLINES
View DigitalDistinctionsTM glass from a distance of 15 ft. (4.3 m) under natural daylight conditions. Color and reflectance many
vary when viewed under a uniform, opaque background. This is not considered a defect.
Variations in perceived color may occur with any ceramic ink and will be more apparent with white or light colors because
of unavoidable light transmission. Due to the inherent variations in ceramic ink thickness, light colors are more readily
influenced by the colors of the materials installed behind the glass. Viracon takes no responsibility for variations in color or
thickness that are within quality standards.
When viewing DigitalDistinctionsTM glass under similar conditions, pinholes, fisheyes, color concentrations, streaks from the
printing process and paint particles are not considered defects.
A clear edge may be visible, contact Viracon for more information.
PATTERN/IMAGE ORIENTATION Patterns or images may be located up to 1/16" (1.6mm) off parallel from the locating glass
edge. Patterns or images may be up to 1/8" (3mm) off parallel from edges other than the locating glass edge.
PATTERN/IMAGE DEFINITION An indefinite border of up to 1/32" (0.8mm) is acceptable. For DigitalDistinctionsTM Dual Image,
the stacking tolerance is 0.002" maximum between dot axis centers. The darker colored dot may be 0.005" larger in diameter
than the lighter colored dot. Dots of identical diameters will still conform to the stacking tolerance.
PATTERN / IMAGE LOCATION Variation of +/- 1/32" (0.8mm) in pattern or image location is acceptable.
SILK-SCREENED GLASSViracon’s silk-screened glass products comply with ASTM C1048 Standard Specification for Heat-Strengthened and Fully
Tempered Flat Glass – Kind HS, Kind FT Coated and Uncoated, Condition B.
INSPECTION GUIDELINES
View silk-screened glass from a distance of 10 feet (3m) under natural daylight conditions. Pinholes larger than 1/16” (1.6mm)
are not allowed if noticeable from a distance of 10 feet or greater. Color as well as opacity of the ceramic frit pattern may vary
slightly due to paint thickness variations.
PATTERN ORIENTATION Patterns may be located up to 1/16” (1.6mm) off parallel from the locating glass edge. Due to glass
dimensions and squareness tolerances, patterns may be up to 1/8” (3mm) off parallel from edges other than the locating glass
edge.
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Q U A L I T Y S T A N D A R D S
PATTERN DEFINITION a print definition of 1/32” (0.8mm) indefinite border is acceptable.
PATTERN REGISTRY Maximum variation of +/- 1/32” (0.8mm) in dot, line or hole location is acceptable. Full coverage
translucent frit is available with the following criteria:
• Pinholes to 1/16” diameter, fisheyes, streaks from screening process and paint particles are allowed. Large clusters of
close spacing of pinholes or other defects are not allowed in the central 80% of the glass area.
• Color and uniformity may vary slightly due to variations in ceramic frit thickness.
• Approval of a full-size mock-up at an 11 foot inspection distance and a 90-degree angle to glass surface against a bright
uniform background is required.
• Not for use in interior applications
S P A N D R E L G L A S SViracon’s spandrel glass products comply with ASTM C 1048 Standard Specification for Heat-Strengthened and Fully Tempered
Flat Glass – Kind HS, Kind FT Coated and Uncoated, Condition B
INSPECTION GUIDELINES
View spandrel glass from a distance of 15 ft. (4.6 m) under natural daylight conditions. Color and reflectance may vary when
viewed under a uniform, opaque background. This is not considered a defect.
When viewing spandrel glass under similar conditions, reflected pinholes and scratches are not considered defects if they are
unobtrusive.
In structurally glazed applications, a clear edge may be visible. Contact Viracon's Architectural Inside Sales Department for
more information.
Viracon reserves the right to change substrate glass suppliers. As a result, this may affect perceived colors of our Viraspan
samples. Approval of all glass colors is based on 12" x 12" (305 mm x 305 mm) samples, which are ordered for each project.
I S O 9 0 0 1When products, systems, machinery and devices work well and safely, it is often because they meet standards and the
organization responsible for many thousands of the standards which benefit the world is ISO the International Organization for
Standardization. Viracon is an ISO 9001 certified company. This certification encompasses Viracon’s entire operation – sales,
customer service, financial services, scheduling, purchasing, fabricating and shipping – to ensure a consistent level of quality
in production.
VIRACON // 119
LOCATION: DUNWOODY, GEORGIA / / GLASS TYPE: VRE1-46, VE1-2M, VE3-63 / / ARCHITECT: COOPER CARY
GLAZING CONTRACTOR: JAMCO / / PHOTOGRAPHER: © VIRACON, RAPHAEL PANTIN
S T A T E F A R M R E G I O N A L H U B , P A R K C E N T E R O N E
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G L A Z I N G G U I D E L I N E S
G L A Z I N G G U I D E L I N E S
GLAZING SYSTEM COMPONENTS AND CLEARANCES
Viracon requires that only 100% silicone blocks be used for all types of glazing systems. The blocks should have a Shore-A
durometer hardness of 85 ±5. They should also be centered at quarter points and be 1/16” (1.6 mm) less than the channel
width. For additional recommendations, contact the appropriate gasket or framing manufacturer.
SETTING BLOCKS85± 5 Shore A Durometer Blocks
centered at 1/4 points with length dependent upon glass area.
WEEP SYSTEM(3/8" Diameter Holes)
SETTING BLOCK LOCATION WEEP HOLE LOCATION
FACE
BITE
EDGE
Viracon specifies that edge blocks or anti-walk blocks be used for dry glazed systems. Viracon also specifies that edge blocks
be silicone and have a Shore-A Durometer hardness of 60 ±5 and be a minimum of 4” in length. They should be installed in
the vertical channel with a 1/8” (3mm) clearance between glass edge and block. This will limit lateral movement of the glass.
Inadequate edge clearances can cause glass breakage as a result of glass-to-frame contact. For recommended face and
minimum edge clearances, as well as minimum glass bites.
Conf igurat ion Glass Thickness
Edge Clearance
Face Clearance
GlassBite
DimensionalTolerance
Thickness Tolerance
Monolithic 1/4" (6mm) 1/4" (6mm) 1/8" (3mm) 3/8" (10mm) ±1/16 (±1.6mm) ASTM C1036
Laminated - 2 plies 1/4" (6mm) 1/2" (12mm) 1/4" (6mm) 1/8" (3mm) 1/2" (13mm) +3/16" / -1/16"
(+4.8mm / -1.6mm) ASTM C1172
Insulating - 1/4" (6mm) Exterior Lite 1/2" (13.2mm) Spacer
1/4" (6mm) Interior Lite
1" (25mm) 1/4" (6mm) 3/16" (5mm) 1/2" (13mm) +3/16" / -1/16" (+4.8mm / -1.6mm)
+1/32" / -1/16" (+.8mm / -1.6mm)
THE "W" INDICATES WIDTH OF GLASS PLY UNIT
RECOMMENDED CLEARANCES
VIRACON // 121
G L A Z I N G G U I D E L I N E S
VISION GLASS
INSULATION
VISION GLASS
SPANDRELGLASS
AIRSPACE(1” MIN)
G L A Z I N G S Y S T E M D R A I N A G E
The edges of laminated, insulating, and spandrel glass should not be exposed to water or moisture vapor for extended periods of
time. Exposure of the glass to moisture vapor or liquid water for extended periods will ultimately result in seal failure, coating
deterioration, sealant deterioration, or delamination. Viracon requires either a positive weather seal, or an adequate weep
system to prevent this occurrence. The effectiveness of the weep system or weather seal depends on the design, workmanship,
engineering, and mock-up verification testing completed by the glazing manufacturer, installer, or designer. Responsibility for
the weep system and its performance is the responsibility of those parties or others, and is not the responsibility of Viracon.
WEEP
CLOSED-CELLNEOPRENE
GASKETDENSE WEDGE
GASKET
F R A M I N G S U P P O R T A N D D E F L E C T I O N The framing system must be designed to provide structural support to the glass and essentially allow the glass to float within
the frame. The following framing tolerances are required:
• Deflection of the framing members under design loads must not exceed the length of the span divided by 175.
• Deflection of the horizontal sill member due to the weight of the glass should not exceed 1/8" nor should the deflection
decrease the head clearance of the panel below by more than 25%.
• Twist of the horizontal sill member between the ends and center of each span, due to the weight of the glass, must be limited
to one degree.
• Bow must not exceed 1/16" in any four foot length of the framing.
• Squareness must be controlled to 1/8" difference in the lengths of the diagonals.
• Offset of adjoining members must not exceed 1/32" at the corners.
S P A N D R E L G L A S S Viracon architectural products carry limited warranties.
Failure to adhere to the following guideline for spandrel
glass will void its warranty: Viracon does not recommend or
warrant applications in which insulation is applied directly
to the glass. The area behind the panel must be vented to
prevent condensation from forming on cold interior surfaces.
Insulation should be installed with a 1” air space between
the glass and insulation. Visit viracon.com for copies of our
product warranties.
TYPICAL GLAZING DETAIL
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G L A Z I N G G U I D E L I N E S
S T R U C T U R A L S I L I C O N E G L A Z I N G
Structural silicone glazing uses silicone sealant on one or more sides of the insulating unit for the structural transfer of loads
from the glass to its perimeter support system and retention of the glass in the opening. When structurally glazed, the fram-
ing system is typically not visible on the exterior facade along the structurally glazed sides.
The sightline for insulating glass used in a structurally glazed application must be calculated based on the unit size and de-
sign loads in order to appropriately support the insulating unit and exterior glass ply. Sightlines are calculated based on ASTM
C1249 Standard Guide for Secondary Seal for Sealed Insulating Glass Units for Structural Sealant Glazing Applications.
Viracon offers a Deflection and Sightline Reference Guide to assist in identifying the appropriate sightline based on glass size
and load. For products not identified on the chart, contact Viracon for sightline requirements specific to your project.
G L A S S H A N D L I N G A N D S T O R A G E
Care needs to be taken during handling and glazing to ensure that glass damage does not occur. Do not allow glass
edges to contact the frame or any hard surface during installation. Use rolling blocks if the insulating units are rotated or
“cartwheeled” on their corners. To see an example of a rolling block, refer to the Glass Association of North America (GANA)
glazing manual.
Improper glass storage techniques may result in damage to glass components, glass surfaces, coatings or glass breakage.
Store glass crates properly to prevent them from tipping. Also, ensure proper blocking and protection from outside elements.
Improper air circulation for spandrel glass may result in glass damage or staining. Refer to Viracon’s Glass Staining Tech Talk
for additional information on glass staining and storage.
Viracon recommends a 5-7° lean against two wide, sturdy uprights, which are capable of withstanding crate weight.
Once the glass is installed, the architect, general contractor or building owner should provide for glass protection and
cleaning. Weathering metals, alkaline materials or abrasive cleaners may cause surface damage. Windblown objects,
welding sparks or other material that contacts the glass surface during construction may cause irreversible damage.
M A I N T E N A N C E A N D C L E A N I N G
It is important to clean the glass during and after construction. Please refer to Glass Cleaning and Maintneance
Recommendations on viracon.com.
G L A S S S T R E N G T H A N D B R E A K A G E
It is important to first determine appropriate loads for the glass. Viracon can supply architects glass strength analyses on
specified products. “Unexplained” glass breakage may still occur due to thermal stress, glazing system pressures, glazing
damage, handling and storage conditions, excessive wind loads, objects and debris striking the glass, improper factory
fabrication or damage by persons or objects at the construction site.
VIRACON // 123
G L O S S A R Y
Acoustics: The science of sound and sound control.
Air Side: The side of float glass that was up, or exposed to the “air”, when it was manufactured. The bottom side is referred to as the “tin” side because it floated on a liquid tin bath. Coatings are applied to the air side.
Annealed: Raw glass with low residual stresses. This enables cutting and fabrication.
Argon Gas: An invisible non toxic gas used in insulating units to enhance the units insulating performance (u-value).
Autoclave: A vessel that employs high pressure and heat. In the glass industry, used to produce a bond between glass interlayers creating a laminated glass product.
Bite: The dimension by which the framing system overlaps the edge of the glazing infill.
Blast Resistant Glass: A laminated glazing construction commonly specified to mitigate injuries from flying glass resulting from an air-blast explosive.
Butt Glazed: The installation of glass products where the vertical glass edges are without structural supporting mullions.
Butyl: Shortened term for polyisobutylene. The primary seal of an insulating unit and key component in restricting moisture vapor transmission.
Capillary Tube: A small tube factory-placed into the air spacer of an insulating unit used for balancing interior and exterior pressures during transportation over higher elevations i.e. mountain ranges or air transport.
Ceramic Frit: An enamel applied to glass for decorative/aesthetic appearances and/or functionality such as solar control, ceramic frit is applied with a large roller for full spandrel applications or through a screen for silk-screen applications.
Ceramic Ink: An enamel applied to glass for decorative and aesthetic appearances and/or functionality such as solar control, ceramic ink is applied with a programmable print head for digital inkjet printing. Ceramic ink has a thinner viscosity than ceramic frit which allows it to flow through the print head.
Coated Glass: A general reference to any glass incorporating a reflective or low-e coating.
Condensation: The appearance of moisture (water vapor) on the surface of an object caused by warm moist air coming into contact with a colder object.
Conventionally Glazed: A framing system that captures the glazing component in the glazing channel.
CPSC 16 CFR 1201: Safety Standard for Architectural Glazing Materials.
Delamination: An unbonded area in laminated glass between glass and PVB.
Desiccant: Small extremely porous beads used to absorb moisture in the sealed air spacer of an insulating unit.
Distortion: Alteration of viewed images caused by variations in glass flatness or inhom*ogeneous portions within the glass, an inherent characteristic of heat-treated glass.
Double Laminated Insulating Glass: An insulating glass unit in which both the interior and exterior components are a laminated glass.
Double Strength: Refers to clear 1/8” (3mm) thick float glass.
Dual Seal: Refers to an insulating unit with a primary seal of polyisobutylene (butyl) and a secondary seal of silicone.
Emissivity: The measure of a surface’s ability to emit long-wave infrared radiation.
Etch: To alter the surface of glass with hydrofluoric acid or other caustic agents. Permanent etching of glass may occur from alkali and other runoff from surrounding building materials.
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G L O S S A R Y
Float Glass: Glass formed on a bath of molten tin. The surface in contact with the tin is known as the tin surface or tin side. The top surface is known as the atmosphere surface or air side.
Fully Tempered Glass (FT): Glass that has been heat-treated to have either a minimum surface compression of 10,000 psi or an edge compression not less than 9700 psi in accordance with the requirements of ASTM C 1048 kind FT or meet the requirements of ANSI Z97.1 or CPSC 16 CFR 1201 safety glazing standards. Tempered glass is 4-5 times stronger than annealed glass and when broken breaks into small relatively harmless pieces.
Glazing: (n) A generic term used to describe an infill material such as glass. (v) The process of installing an infill material into a prepared opening in windows, door panels, partitions, etc.
Ground Edge: A special fabrication done to the edge of a piece of glass. Makes the edge smooth and gives it a whitish/gray appearance.
Heat Soak: A process of heating glass to a specific temperature for a specified time in a special oven in an attempt to find any impurities in the glass known as “nickel sulfide inclusions”.
Heat Strengthened (HS): Glass that has been heat-treated to have a surface compression between 3500 and 7500 psi and meet the requirements for ASTM C 1048 kind HS. It is ~2-3 times the strength of annealed glass. Heat-strengthened glass is not a safety glazing material and will not meet the requirements of ANSI Z97.1 or CPSC 16 CFR 1201.
Heat Transfer Methods: Heat transfers from one place to another via convection, conduction or radiation. Convection occurs from the upward movement of warm light air currents. Conduction occurs when energy passes from one object to another. Radiation occurs when heat is sent through space and is capable of traveling to a distant object where it can be reflected absorbed or transmitted.
Heat Treated: Term used for both fully tempered glass and heat-strengthened glass.
Hurricane / cyclic wind-resistant glass: Laminated glazing tested to one or more test protocols for high velocity hurricane winds and windborne debris.
Infrared (IR): IR is part of the solar spectrum or sunlight that is invisible to the human eye. It has a wavelength range of ~790-3000 nanometers and has a penetrating heat effect. Short-wave IR converts to heat when it is absorbed by an object.
Insulating Glass (IG): Two glass components separated by an air spacer and hermetically sealed. Inherently insulating glass increases a window’s thermal performance.
Insulating Laminated Glass: An insulating glass unit in which the exterior component is a monolithic glass ply and the interior component is laminated glass.
Interlayer: Refers to the plastic or vinyl in a laminated unit.
Iridescence: Also called strain pattern or Q-lines. It is a pattern in heat treated glass not normally visible except under certain lighting conditions. It is especially visible with the use of a polarized lens. Iridescence is an inherent characteristic of heat treated glass.
Laminated Glass: Two or more pieces of glass bonded together by a piece of plastic/vinyl called polyvinyl butyral (PVB.) A minimum interlayer thickness of .030 (.76mm) meets the requirements of ANSI Z97.1 or CPSC 16 CFR 1201 safety glazing standards.
Laminated Insulating Glass: An insulating glass unit in which the exterior component is a laminated glass and the interior component is a monolithic glass ply.
Light to Solar Gain Ratio (LSG): The ratio is equal to the Visible Light Transmittance divided by the Solar Heat Gain Coefficient. The Department of Energy's Federal Technology Alert publication of the Federal Energy Management Program (FEMP) views an LSG of 1.25 or greater to be Green Glazing/Spectrally Selective Glazing.
Lite: Another term for a pane of glass. Sometimes spelled "light" in industry literature.
VIRACON // 125
Low-E: An abbreviation for Low Emissivity coatings. They are applied to glass to reflect invisible long-wave infrared or heat. They reduce heat gain or loss in a building by redirecting the heat. In addition they typically provide greater light transmission low reflection and reduce heat transfer.
Low iron: Low iron glass is a type of float glass manufactured with less iron than standard clear glass. With this reduction in iron content the greenish tint is reduced. UltraWhiteTM, Starphire® and OptiwhiteTM are low iron glass substrates.
Lucor: A powder used to separate lites of glass to prevent damage from scratching or rubbing.
Mock-Up: A full size sample or model of a unit normally used to judge appearance and performance.
Monolithic: Refers to a single lite of glass as a finished product.
Mullion: A horizontal or vertical member that supports and holds such items as panels, glass, sash or sections of a curtain wall.
Negative Air: Refers to an insulating unit wherein the two lites of glass are closer together in the center of the unit than they are at the edge. This gives the unit the appearance of being "bowed in".
Nickel Sulfide: An inclusion in float glass that can cause spontaneous breakage in fully tempered glass.
Offset: Glass unit wherein the two glass ply edges are intentionally not aligned.
OITC Rating: Outside-Inside Transmission Class Rating is used to classify acoustic performance of glazing in exterior applications.
Pattern Glass: Glass with textured surface to emit light but restrict vision.
Polished Edge: A special fabrication done to the edge of a piece of glass. Makes the edge smooth and gives it an extremely shiny or polished appearance.
Polyisobutylene (PIB): The primary seal of an insulating unit and the key component in restricting moisture vapor transmission.
Polyurethane: Also commonly called urethane. Used by some insulating fabricators for a secondary sealant. It is also an interlayer used in polycarbonate security products.
Polyvinyl Butyral (PVB): The plastic or vinyl used in the makeup of a laminated unit. The vinyl is what holds that unit together.
Positive Air: The opposite of negative air. In an insulating unit where the center of the unit is farther apart than around the air spacer these units have a bowed out appearance.
Pyrolytic Deposition: A process of applying a thin metallic coating to the surface of flat glass during the float glass manufacturing process.
R-Value: Thermal resistance of a glazing system expressed ft2/hr/°F/BTU (m2/W/°C). The r-value is the reciprocal of the U-value. The higher the R-value, the less heat is transmitted through the glazing material.
RAT Equation: The RAT equation accounts for 100 percent of solar energy which is equal to the sum of solar reflectance absorption and transmittance. For example with a single pane of 1/8” (3mm) clear glass 83 percent of solar energy is transmitted 8 percent is reflected and 9 percent is absorbed by the glass. Of the solar energy absorbed portions are emitted back towards the exterior and towards the building interior.
Reflective Glass: See Solar Reflective Coatings
Relative Heat Gain (RHG): The amount of heat gained through glass taking into consideration the effects U-value and shading coefficient. The English System relative heat gain is calculated as: RHG = (Summer U-value x 14°F) + (Shading Coefficient x 200). The Metric System is calculated as: RHG = (Summer U-value x 7.8°C) + (Shading Coefficient x 630). The lower the RHG the more the glass product restricts heat gain.
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G L O S S A R Y
Roller Wave: The appearance of waviness sometimes seen in heat treated glass caused by the glass moving over rollers in the tempering furnace.
Sandblasted Finish: A surface treatment for flat glass obtained by spraying the glass with hard particles to roughen the surface. The method restricts vision while maintaining a level of light transmission.
Setting Blocks: Generally rectangular, cured extrusions on which the glass product bottom edge is placed to effectively support the weight of the glass. Viracon recommends that only 100% silicone setting blocks be used for all types of glazing systems.
Shading Coefficient: Shading coefficient is the ratio of solar heat gain through a specific type of glass that is relative to the solar heat gain through a 1/8”” (3mm) ply of clear glass under identical conditions. As the shading coefficient number decreases heat gain is reduced which means a better performing product.
Sightline for Insulating Glass: Edge dimension of insulating glass covered by spacer and intended to be covered in glazing channel.
Silk-screen: A process of applying a specific design or pattern to glass. The design is made by placing a screen over a piece of glass and then pressing ceramic frit by means of a large squeegee through the pores of the screen. After the frit is applied the glass goes through an infrared oven to dry the frit and then through a tempering furnace to fire (bond) the frit to the glass permanently.
Skylight: A window glazed in a roof or ceiling of a building.
Sloped Glazing: Glass units that are glazed more than 15° off vertical.
Solar Control Glass: Tinted and/or coated glass that reduces the amount of solar heat gain transmitted through a glazing product.
Solar Energy: The sum total of the solar spectrum.
Solar Heat Gain Coefficient (SHGC): The portion of directly transmitted and absorbed solar energy that enters into the building’s interior. The higher the SHGC the higher the heat gain.
Solar Reflectance: The percentage of solar energy that is reflected from the glass surface(s).
Solar Reflective Coatings: Coatings that reduce heat gain through higher solar reflection.
Solar Spectrum: The solar spectrum commonly referred to as sunlight consists of ultraviolet light (UV) visible light and infrared (IR). The energy distribution within the solar spectrum is approximately 2 percent UV 47 percent visible light and 51 percent IR.
Solar Transmittance: The percentage of ultraviolet visible and near infrared energy (300 - 3000 nanometers) that is transmitted through the glass.
Spacer: A desiccant filled frame used to separate two lites of glass in an insulating unit.
Spandrel: The panel(s) of a wall located between vision areas of windows which conceal structural columns floors and shear walls.
STC Rating: Sound Transmission Class Rating is a single-number rating system for interior building partitions and viewing windows used to categorize acoustic performance. Its original intent was to quantify interior building partitions not exterior wall components. As a result it is not recommended for glass selection of exterior wall applications since the single-number rating was achieved under a specific set of laboratory conditions.
Structurally Glazed: The use of a silicone sealant on one or more sides of the insulating unit for the structural transfer of loads from the glass to its perimeter support system and retention of the glass in the opening.
Substrate: The raw glass or base material to which other materials or fabrication procedures are applied.
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Tin Side: The bottom side of float glass as it was manufactured called “tin side” because float glass rides on a bath of liquid tin while it is being cooled.
Turtle Code: The Florida Marine Turtle Protection law requires architectural glass to transmit no more than 45% of light from inside. The reason, light from a coastal building within 1,000 feet of the seashore attracts marine turtle hatchlings aways from their natural environment at sea.
U-Value: A measure of heat gain or heat loss through glass due to the thermal conductance and the difference in indoor and outdoor temperatures. As the u-value decreases, so does the amount of heat that is transferred through the glazing material. The lower the u-value the more restrictive the fenestration product is to heat transfer; reciprocal of r-value.
Ultraviolet Light (UV): The name of the invisible portion of the light spectrum with wavelengths shorter than 390 nanometers. The damaging effects on long-term UV exposure results in fabric fading and plastic deterioration.
Vacuum (Sputtering) Deposition: Process for applying multiple layers of metallic coatings to the surface of flat glass in a vacuum chamber.
Visible Light Reflectance: The percentage of light that is reflected from the glass surface(s).
Visible Light Transmittance: The percentage of visible light (380 - 780 nanometers) that is transmitted through the glass. (Visible light is the only portion of the solar spectrum visible to the human eye.)
Warm Edge: Term used to describe insulating spacer technologies that achieve better center of glass thermal performance (u-value) than a traditional aluminum spacer.
Weeps (or Weep Holes): Drain holes or slots in the sash or framing member to prevent accumulation of condensation and water.
Wet Seal: Application of an elastomeric sealant between the glass and sash to form a weather-tight seal.
LOCATION: SEATTLE, WASHINGTON // GLASS TYPE: VE1-45 // ARCHITECT: 360 ARCHITECTURE
GLAZING CONTRACTOR: WALTERS & WOLF // PHOTOGRAPHER: © DALE LANG
H U S K Y S T A D I U M , U N I V E R S I T Y O F W A S H I N G T O N ( R E N O V A T I O N )
128 VIRACON // RESOURCES
W A R R A N T Y
W A R R A N T Y
Reference viracon.com for a complete list of Viracon product warranties.
Viracon’s Standard Ten-Year Limited Warranty document applies to the following product lines:
• Tempered and Heat Strengthened Glass
• ViraspanTM Ceramic Frit Silk-screen and Spandrel Glass
• High-Performance Coated Glass
• Insulating Glass Unit (Dual Seal Unit)
• Insulating Glass Structural Glazing
• Insulating Glazing of Metal Extrusions
• Laminated Glass and Laminated Glass Sloped Glazing
Five-Year Limited Warranties apply to the following product lines:
• DigitalDistinctionsTM Ceramic Ink Glass Print
• Heat Soaked Tempered Glass
VIRACON // 129
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T R A D E M A R K S
Viracon® and StormGuard® are registered trademarks of Viracon.
Glass is Everything™ is a trademark of Viracon.
ClearPoint™, CyberShield™, DigitalDistinctions™, RoomSide™, ExtremEdgeTM and Viraspan™ are trademarks of Viracon.
SentryGlas® is a registered trademark of Kurray.
Saflex® and Vanceva® are registered trademarks of Solutia, a subsidiary of Eastman Chemical Company.
EverGreen™, Optiwhite™, OptiView™, Graphite Blue™ and DataStop™ are trademarks of Pilkington.
CrystalGray™ is a trademark of Guardian Industries Corp.
Optigray® glass, Azuria™ glass, Starphire® glass, Solarblue™ glass and Pacifica™ glass are trademarks of PPG Industries
Ohio, Inc.
Apple, the Apple logo, and iPad are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service
mark of Apple Inc.
P A T E N T S
Viracon's VUE coatings are covered by one or more of the following U.S. Patents: 8,574,718 and 8,895,150.
T R A D E M A R K S & P A T E N T S
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185 POST STREET MONOLITHIC, SILK-SCREEN 090
535 MISSION VRE1-54 vi
AMAZON VULCAN BLOCK 26 & 32 VE1-2M, SILK-SCREEN 021
BBVA COMPASS PLAZA VNE1-63, VNE24-63, VRE1-46, SPANDREL 019
BRIDGEPOINT ACTIVE HEALTHCARE VNE15-63, VRE15-38 iii
CARPENTERS UNION INTERNATIONAL TRAINING CENTER (ITC) PHASE V VNE24-63 002,003
CLEVELAND INSTITUTE OF ART, GEORGE GUND BUILDING VE1-2M, VRE19-59, VE1-45 032
CENTER FOR SUSTAINABLE URBAN LIVING, LOYOLA UNIVERSITY VE1-2M, VE1-85 055
COLLABORATIVE LIFE SCIENCES BUILDING, OHSU/OSU VE1-2M, VNE1-63 068
COLLEGE OF ARTS & SCIENCES, EMBRY-RIDDLE AERONAUTICAL UNIVERSITY VLE1-70/PACIFICA 087
COLORADO TOWER VRE1-46, VRE19-38, VS1-14 078
CONFIDENTIAL PROJECT VE1-85, VRE1-46 115
CONNEXTIONS VRE26-38 008
DELTA HOTEL & BREMNER TOWER, SOUTHCORE FINANCIAL CENTRE VE1-2M, VE1-42, VE24-2M, VLE19-57, VRE1-46, VRE19-59 074
DNV GL TECHNOLOGY CENTRE VLE26-39, SILK-SCREEN 023
EDITH GREEN-WENDELL WYATT FEDERAL BUILDING (RENOVATION) VE2-2M 044
EIGHTH AND MAIN VE1-42, VE6-42 VII
EL PASO CLOCK TOWER, SOUTHWEST UNIVERSITY PARK DIGITALDISTINCTIONSTM, LAMINATED, MONOLITHIC 033
FAENA HOUSE, SAXONY HOTEL (RENOVATION) VE1-42, ROOMSIDETM LOW-E 014
FEDERAL OFFICE BUILDING CYBERSHIELDTM, VLE13-57, VRE13-59 045
FIONA STANLEY HOSPITAL VNE1-63, VNE19-63 043
GENERAL FUNDING OFFICE BUILDING VLE19-39, VLE26-39 085
GRAN TORRE COSTANERA VRE1-54 075
HARIM GROUP HEADQUARTERS VRE1-46, VE1-2M, VE24-2M, RoomSideTM Low-E COVER
HILTON COLUMBUS DOWNTOWN CLEARPOINTTM, LAMINATED, SILK-SCREEN, VE1-2M 063
HOWARD HUGHES CENTER VA1-18, VA1-35, VS1-08, VT1-20 090
HUB GROUP CORPORATE HEADQUARTERS VNE1-63, SPANDREL 016
HUSKY STADIUM, UNIVERSITY OF WASHINGTON (RENOVATION) VE1-45 127
IBC BANK PLAZA VE1-2M, VE1-42 066
JAMCO TEXAS HEADQUARTERS CLEARPOINTTM, DIGITALDISTINCTIONSTM, VRE29-38, VRE29-54 063
LIBERTY PARKWAY TOWER VE1-2M, VE19-2M, VRE1-54 048
LIFE SCIENCE LABORATORIES, UNIVERSITY OF MASSACHUSETTS VE1-2M 045
MARITIME AND SEAFOOD INDUSTRY MUSEUM VUE1-50 034
MARRIOTT MARQUIS VE1-2M, VRE1-38, VRE1-59, LAMINATED 046
MICHAEL A. EVANS CENTER FOR HEALTH SCIENCES, MARIAN UNIVERSITY VE1-2M, VE1-85, VUE1-50, VANCEVA COLOR SYSTEM 083, 095
MSC INDUSTRIAL SUPPLY CO-HEADQUARTERS VUE1-50 070
NORTH PATIENT TOWER, ORLANDO REGIONAL MEDICAL CENTER VLE1-39, VLE1-57, VS1-20 078
NU SKIN INNOVATION CENTER (EXPANSION) LAMINATED, VRE1-59 038
ONE57 VRE13-59, VRE19-59 096
ORCHARD TRIMBLE VNE1-63, SILK-SCREEN 027
PATRIOT PLAZA, SARASOTA NATIONAL CEMETERY LAMINATED 040
SKYSONG3, ASU SCOTTSDALE INNOVATION CENTER VUE1-30, VUE1-50 015
STATE FARM REGIONAL HUB, PARK CENTER ONE VRE1-46, VE1-2M, VE3-63 119
THE MOTHER BABY CENTER VE19-2M, VANCEVA COLOR SYSTEM 087
THE RESIDENCES AT CITYCENTER VE1-2M, VE3-2M 004
TIDEWATER COMMUNITY COLLEGE LEARNING RESOURCE CENTER VE1-2M, VE1-85, VNE1-63, SILK-SCREEN 028
TORRE SOFIA VNE1-63, VRE1-38 073
UBIQUOSS VNE1-63 068
PHOTOGRAPHY INDEX
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MAR2017
Archi tectural Glass Solut ions for Your Next Landmark Project
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