This is something we're seeing occasionally and I'm wondering if others are seeing it also.
A typical office area within a noncombustible building. All rooms within the greater area have lowered finished ceilings, are mostly light hazard, and the space above is noncombustible and (almost) concealed. A small mechanical room (or 2 or 3) is located among the various offices. This mech room is less than 130 sf, so the floor area can be protected with 1 sprinkler. However, the A/E has decided this room doesn't need a ceiling and the perimeter walls can stop 6" above the ceiling height of the adjacent rooms. This makes the space above the surrounding offices noncombustible but not truly concealed. See below. NFPA 13 (2013) tells me I have to sprinkler the entire noncombustible space above the offices. 188.8.131.52 doesn't apply since it's open on all 4 sides. We're working with GC to convince them to add a ceiling or to extend the walls up to the roof deck. It's just way too easy to overlook this kind of seemingly minor detail when bidding, and difficult to get a change order (or walls/ceilings added) after the contract's signed. So, just wondering if anybody else is seeing this issue. Ed Kramer Bamford Fire
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