I am designing a fire sprinkler system for a 5-story residential apartment building.
The building is Type V wood truss construction with 16" open web wood trusses.
The floor/ceiling assembly is a one-hour fire-resistance-rated construction (UL listed). Sheetrock is attached directly to the bottom of the joists with wood subfloor on top. The ceiling is inaccessible (concealed).
The question of sprinkler above the ceiling has come up. I don't see a need for them. There is 6" sound batting above the ceiling.
The Fire Marshal does not allow NFPA 13R design. It an NFPA 13 design.
Is this space required to be protected?
Any input would be helpful, thanks in advance.
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