Overhead Glazing

Glass which slopes more than 15° from the vertical is considered sloped glazing by the major model building codes. Laminated glass is the preferred product for sloped and overhead glazing, because the glass is retained in the opening, even when broken, reducing the possibility of injury from falling glass.

Overhad Glazing

Capabilities [+][-]

Overhead Glazing Capabilities

Oldcastle BuildingEnvelope® can calculate the most suitable glass for use in any given application. However, it is the responsibility of the design professional to calculate and provide the equivalent design load. This calculation must take into account the correct combination of snow load (if applicable), wind load and dead load. Without the equivalent design load, Oldcastle BuildingEnvelope® must rely on the conservative limits recommended by the American Architectural Manufacturers Association (AAMA) for four-side uniform support. See AAMA Guidelines below

 

AAMA Guidelines for Overhead Glazing
Designation in inches Glass Type Outboard Lite in inches Air Space in inches Inboard Construction
Glass-PVB-Glass in inches
Maximum Size
sq. ft.
Weight
lbs/ft2
1/4 Annealed 1/8 - 0.030 - 1/8 12 3.42
3/8 Annealed 3/16 - 0.030 - 3/16 18 5.05
1/2 Annealed 1/4 - 0.030 - 1/4 24 6.67
5/16 Heat-strengthened 1/8 - 0.060 - 1/8 25 3.58
7/16 Heat-strengthened 3/16 - 0.060 - 3/16 40 5.21
9/16(1) Heat-strengthened 1/4 - 0.060 - 1/4 40 6.83
13/16(1) Heat-strengthened 3/8 - 0.060 - 3/8 40 10.09
11/16(1) Tempered 1/2 - 0.060 - 1/2 40 13.33
7/8 Annealed 1/8 1/2 1/8 - 0.030 - 1/8 12 5.05
11/16 Annealed 3/16 1/2 3/16 - 0.030 - 3/16 18 6.67
11/4 Annealed 1/4 1/2 1/4 - 0.030 - 1/4 24 8.29
7/8 Heat-strengthened 1/8 1/2 1/8 - 0.060 - 1/8 25 5.21
11/8 Heat-strengthened 3/16 1/2 3/16 - 0.060 - 3/16 40 6.83
15/16 Heat-strengthened 1/4 1/2 1/4 - 0.060 - 1/4 40 8.45

 

These are conservative designs assuming the glass is horizontal with maximum snow load.
Detailed engineering design particularly on sloped glazing can often increase the maximum allowable size.
(1) These products are recommended for point-supported canopies. Point supported laminates must be fully tempered.

Description [+][-]

Overhead Glazing Description

Laminated glass for use in sloped and overhead glazing can be used monolithically or fabricated into insulating glass units. Insulating glass units typically consist of an outboard lite of heat-strengthened glass that resists accidental damage caused by falling objects, and an inboard laminated glass that captures any fragments. Tempered glass is not normally recommended for the outboard lite as small broken particles can easily slide down the outside of the roof and onto the ground in the event of accidental damage.

Glass Colors [+][-]

Laminated Glass Colors

Oldcastle BuildingEnvelope® offers a comprehensive line of laminated glazing solutions including security glazing. The glass types listed below are included in the Laminated Glass offering. Oldcastle BuildingEnvelope® offers a variety of glass products to meet your architectural glazing design needs. Please contact Oldcastle BuildingEnvelope® for product availability and performance data as this information is subject to change without notice.

Laminated architectural glass can be fabricated using various glass types, including low-e, clear, low-iron, tinted, reflective, patterned or wired glass to achieve desired aesthetics or to improve solar control and thermal performance. Mass pigmented and decorative interlayers can also be use to provide a wide range of effects.

For monolithic, laminated or insulating glass unit performance data, please go to GlasSelect®, our on-line glass performance calculator. For a brief tutorial on how to use GlasSelect®, please click on How to Use GlasSelect® Demo.

The tables below include a selection of the most common colors available. For full details of the decorative interlayers including Vanceva® Color, Pattern, Metallic and Image see the decorative section

Assistance Options:

  1. Call toll-free, 866-653-2278.
  2. Send e-mail to Technical Support.
Clear Glass Products
Laminated 1/8" Clear - 0.030" Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.060" Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.090" Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.035" SentryGlas® - 1/8" Clear
Laminated 1/8" Clear - 0.060" SentryGlas® - 1/8" Clear
Laminated 1/8" Clear - 0.090" SentryGlas® - 1/8" Clear
Laminated 1/8" Clear - 0.100" Saflex® HP Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.075" StormGlass™ - 1/8" Clear
Laminated 3/16" Clear - 0.030" Clear PVB - 3/16" Clear
Laminated 3/16" Clear - 0.060" Clear PVB - 3/16" Clear
Laminated 3/16" Clear - 0.090" Clear PVB - 3/16" Clear
Laminated 3/16" Clear - 0.035" SentryGlas® - 3/16" Clear
Laminated 3/16" Clear - 0.060" SentryGlas® - 3/16" Clear
Laminated 3/16" Clear - 0.090" SentryGlas® - 3/16" Clear
Laminated 3/16" Clear - 0.100" Saflex® HP Clear PVB - 3/16" Clear
Laminated 3/16" Clear - 0.075" StormGlass™ - 3/16" Clear
Laminated 1/4" Clear - 0.030" Clear PVB - 1/4" Clear
Laminated 1/4" Clear - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Clear - 0.090" Clear PVB - 1/4" Clear
Laminated 1/4" Clear - 0.035" SentryGlas® - 1/4" Clear
Laminated 1/4" Clear - 0.060" SentryGlas® - 1/4" Clear
Laminated 1/4" Clear - 0.090" SentryGlas® - 1/4" Clear
Laminated 1/4" Clear - 0.100" Saflex® HP Clear PVB - 1/4" Clear
Laminated 1/4" Clear - 0.075" StormGlass™ - 1/4" Clear

 

White Glass Products
Laminated 1/8" Clear - 0.015" Vanceva® Polar White (220700) PVB + 0.015" Saflex® Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.030" Vanceva® Arctic Snow (216500) White PVB - 1/8" Clear
Laminated 1/8" Clear - 0.030" Vanceva® Cool White (218000) PVB - 1/8" Clear
Laminated 1/8" Clear - 0.030" Trosifol® Translucent White (2165) White PVB - 1/8" Clear
Laminated 1/8" Clear - 0.030" Trosifol® Soft White (2180) White PVB - 1/8" Clear

 

Grey Glass Products
Tint
Laminated 1/8" Clear - 0.030" Saflex® Medium Gray (654400) PVB - 1/8" Clear
Laminated 1/8" Clear - 0.015" Vanceva® Evening Shadow (835000) PVB + 0.015" Saflex® Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.015" Vanceva® Smoke Gray (837800) PVB + 0.015" Saflex® Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.030" Trosifol® Gray (6544) PVB - 1/8" Clear
Laminated 1/8" Gray - 0.060" Clear PVB - 1/8" Clear
Laminated 1/8" Gray - 0.060" Clear PVB - 1/8" Gray
Laminated 3/16" Gray - 0.060" Clear PVB - 3/16" Clear
Laminated 3/16" Gray - 0.060" Clear PVB - 3/16" Gray
Laminated 1/4" Gray - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Guardian MidnightGray™ High Performance Tint - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Pilkington SuperGrey™ High Performance Tint - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Vitro Graylite® II High Performance Tint - 0.060" Clear PVB - 1/4" Clear
Reflective
Laminated 1/4" Vitro Solarcool® Gray Reflective #2 - 0.060" Clear PVB - 1/4" Clear

 

Bronze Glass Products
Tint
Laminated 1/8" Clear - 0.030" Saflex® Light Bronze (645200) PVB - 1/8" Clear
Laminated 1/8" Clear - 0.030" Trosifol® Bronze (6452) PVB - 1/8" Clear
Laminated 1/8" Bronze - 0.060" Clear PVB - 1/8" Clear
Laminated 1/8" Bronze - 0.060" Clear PVB - 1/8" Bronze
Laminated 3/16" Bronze - 0.060" Clear PVB - 3/16" Clear
Laminated 3/16" Bronze - 0.060" Clear PVB - 3/16" Bronze
Laminated 1/4" Bronze - 0.060" Clear PVB - 1/4" Clear
Reflective
Laminated 1/4" Vitro Solarcool® Bronze Reflective #2 - 0.060" Clear PVB - 1/4" Clear

 

Green Glass Products
Tint
Laminated 1/8" Green - 0.060" Clear PVB - 1/8" Clear
Laminated 1/8" Green - 0.060" Clear PVB - 1/8" Green
Laminated 3/16" Green - 0.060" Clear PVB - 3/16" Clear
Laminated 3/16" Green - 0.060" Clear PVB - 3/16" Green
Laminated 1/4" Green - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Pilkington EverGreen™ High Performance Tint - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Vitro Atlantica® High Performance Tint - 0.060" Clear PVB - 1/4" Clear

 

Blue-Green Glass Products
Tint
Laminated 1/8" Clear - 0.030" Saflex® Medium Blue-Green (377300) PVB - 1/8" Clear
Laminated 1/8" Clear - 0.030" Trosifol® Light Blue-Green (3773) PVB - 1/8" Clear
Laminated 1/4" Pilkington Optifloat™ Blue-Green Tint - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Vitro Azuria® High Performance Tint - 0.060" Clear PVB - 1/4" Clear
Reflective
Laminated 1/4" Vitro Solarcool® Azuria® (2) - 0.060" Clear PVB - 1/4" Clear

 

Blue Glass Products
Tint
Laminated 1/8" Clear - 0.015" Vanceva® Aquamarine (827800) PVB + 0.015" Saflex® Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.015" Vanceva® Sapphire (825000) PVB + 0.015" Saflex® Clear PVB - 1/8" Clear
Laminated 1/8" Clear - 0.015" Vanceva® True Blue (841400) PVB + 0.015" Saflex® Clear PVB - 1/8" Clear
Laminated 1/4" Pilkington Arctic Blue™ - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Vitro Solarblue® - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Vitro Pacifica® High Performance Tint - 0.060" Clear PVB - 1/4" Clear
Reflective
Laminated 1/4" Vitro Solarcool® Pacifica® Reflective #2 - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Vitro Solarcool® Solarblue® Reflective #2 - 0.060" Clear PVB - 1/4" Clear
Laminated 1/4" Vitro Vistacool® Pacifica® Reflective #2 - 0.060" Clear PVB - 1/4" Clear

Point-Supported Canopies [+][-]

Point-supported canopies are commonly used as features at entrances to offices, stores and residential properties. They are defined as overhead glazing where the glass is supported by fasteners that pass through holes in the glass and that cannot be offered in annealed glass due to high stresses. The support structure can be either above or below the glass. This type of design is specifically excluded from ASTM E1300 Standard Practice for Determining the Load Resistance of Glass in Buildings and needs careful, specific engineering design.

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