2.1.1
Clear Glass
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NOTE: Glass areas and thicknesses are based on 1.20
kilopascals 25 pounds per square foot (psf) design
wind load and vertical glazing with annealed glass.
For other glass and for wind loads greater than 1.20
kPa 25 psf, thickness will depend upon aspect ratio
(length divided by width), area, and design wind
load. The thickness and area limitations for each
type of glass must be indicated or specified. Do
not specify glass less than 3.0 mm 1/8 inch.
Method of Determination for Minimum Glass Thickness:
1. Determine peak gust wind speed and corresponding
design wind loads, considering location, height,
shape, and orientation, in accordance with ASCE 7
"Minimum Design Loads for Buildings and Other
Structures", latest edition.
2. Determine aspect ratio, area, and type of glass
for each opening to be glazed.
3. Select thickness required from glass
manufacturer's chart for each type of glass.
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NOTE: Use the following data on Army projects
a. Category I Products: Doors and glazed panels
that contain single piece of glazing material no
greater than 0.84 m2 9 ft2 in area. The product
must be capable of withstanding 203 Nm 150 foot
pound impact load test.
b. Category II Products: Doors and glazed panels
that contain any single piece of glazing material
greater than 0.84 m2 9 ft2 in area. The product
must be capable of withstanding a 542 Nm
400-foot-pound impact load test. Category II
products may be used in both Category I and Category
II situations.
c. Doors: 16 CFR 1201 applies to all types of
interior doors and exterior doors, including storm
doors and combination doors. FIRE/SAFETY RATED
GLASS: Is not required for openings in doors
through which a 76 mm (3 inch) diameter sphere is
unable to pass. Glazing for fire doors shall be in
accordance with NFPA 80, even though this may be at
variance with requirements of 16 CFR 1201.
d. Glazed Panels: 16 CFR 1201 no longer applies to
exterior and interior glazed panels. FIRE/SAFETY
RATED GLASS: Glazed panels shall conform to ANSI
Z97.1, SAFETY PERFORMANCE SPECIFICATION AND METHODS
OF TEST FOR SAFETY GLAZING MATERIALS USED IN
SECTION 08800
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