I'm working on a project that is using cold-formed steel joist framing to build a mezzanine in a existing warehouse. They are using 3/4" plywood as the subfloor. They are actually forming the studs on site as they go.
Is this considered a combustible concealed space?
Would this require COIN (combustible interstitial) sprinklers per NFPA 13 Section 18.104.22.168?
The framed joists are 2-inches deep, and from deck to ceiling is 60 inches.
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6/30/2022 07:59:47 am
Yes - This is considered a combustible concealed space (upper deck wood framing and it sounds like the support columns may also be combustible.
6/30/2022 08:13:20 am
Initial review you have concealed combustible construction.
6/30/2022 08:15:38 am
Combustible concealed space exceeding 36" in depth. COIN is not applicable. Check the date sheets
6/30/2022 11:31:37 am
Yes it is. However, there are ways to avoid protecting the joist channels depending upon how deep they are. Consult the combustible concealed space section in 13, and as always, ask your AHJ
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