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Fire Rated Glass FAQ and Fire Codes
When is safety glass required?
Impact resistant safety glass is required in hazardous locations which is defined as being in a door, within 24" of a door, within 18" of the floor per IBC 2406.
What is the maximum fire rating and maximum size?
Doors up to 60 minute have a max size of 36" x 89" (non-temp rise)
Doors up to 90 minute have a max size of 36" x 56-1/2" (non-temp rise)
Doors up to 180 minute and temp rise doors have a max size of 100 square inches
Glass in walls is slightly more complicated - It has a maximum allowable exposed area (clear view), along with a maximum sheet size, and a maximum width and maximum height.
Walls up to 60 minute have a max exposed glass area of 3,325 square inches (23 square feet). The max sheet size is 96" x 48".
Walls up to 90 minute have a max exposed glass area of 2,627 square inches (18.24 square feet). The max allowable width or height cannot exceed 56-1/2". And the max sheet size is 96" x 48".
What codes does this fire rated glass meet?
UL 9, UL 10B, UL 10C, NFPA 80, NFPA 257, and Hose Stream.
If safety rated is selected, then it meets all the codes above and NFPA 252, ANSI Z97.1 CPSC 16 CFR 1201 CAT II.
Is this glass labeled with the fire rating?
Yes, per IBC 703.6, fire rated glass must be permanently labeled with the fire rating in accordance with Table 716.3