What is out there for a non-load restricted 2 h rated wood frame floor assembly?
The only one I found in my search was M514 which is quite a monstrosity (2 h finish rating!). There are some others with fewer layers of drywall, but all seem to have a load restriction. Based on UL guides, load restrictions are particularly impactful for wood floors (factor of 0.65 applied).
I am dealing with a system that is used to protect storage tanks at one of our industrial facilities, this system is an outdoor deluge
NBC 2015 Div B-9.8.9.5. Treads 1) Stair treads of lumber, plywood or O-2 grade OSB within dwelling units shall be not less than 25 mm
My question is: Is there ever a time that access needs to be provided around an entire building?
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2 Responses
Here is a link to the “monstrosity” referred to above if anyone is interested: https://iq.ulprospector.com/en/profile?e=225228
The load-restriction table should be reviewed as the 0.65 factor is based upon nominal 2×10 wood joist members only. OWWJ / trusses are not mentioned. Other options exist with cUL listings with concrete topping or cementitious backer units. One will need a login on the UL/ULC web-site.