OSHA
stair (1910.25 standard)
42" guards
36" inboard rails
45° incline
For industrial/commercial
uses to 144"
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IBC
Industrial/Institutional
stair - External Guard
36" handrails
42" outboard guards
32° comfort angle, conforms
to new OSHA 2017 standard
For IBC use groups F, H, I, S
to 144"
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