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2409.3 Visions Panels in Elevator Hoistway Doors
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Glass in vision panels in elevator hoistway doors shall be permitted to be any transparent glazing material not less than 1/4 inch (6.4 mm) in thickness conforming to Class A in accordance with ANSI Z97.1 or Category II in accordance with CPSC 16 CFR Part 1201. The area of any single vision panel shall be not less than 24 square inches (15 484 mm2) and the total area of one or more vision panels in any hoistway door shall be not more than 85 square inches (54 839 mm2).