We are bidding a job that has an alternate to install a wood panel ceiling in lieu of the ACT shown on the drawings.
The drawings reference the need to install custom-color ceiling plates but no mention is made of the need to install upright heads above the ceiling.
Is upright protection required above a wood ceiling or can wood ceilings have a flame spread rating that will preclude the need for upright protection above the ceiling?
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10/4/2022 08:05:21 am
Request a data sheet for the proposed alternative. That will be the only way to be sure.
10/4/2022 08:23:01 am
Yes - Sprinklers would be required above a wood ceiling due to the exposed combustible faces within what would normally be a noncombustible space.
Todd E Wyatt
10/4/2022 08:29:42 am
The adopted Building Code (e.g. 2021 IBC) limits the allowable fire performance and smoke development of interior ceiling finish materials based on occupancy classification. TABLE 803.13 INTERIOR WALL AND CEILING FINISH REQUIREMENTS BY OCCUPANCY identifies the maximum flame spread index classification (A, B, or C) based on 1) if the building is “sprinklered or nonsprinklered”, 2) the Occupancy Classification “group”, and 3) the location of the ceiling (Exits, Corridors or Rooms).
10/4/2022 08:47:16 am
You'll need the data sheet and test data for the combustible (potentially) ceiling material. But I would absolutely plan on protecting the area above.
10/4/2022 09:43:05 am
Sprinklers would normally be required above since it's a combustible material. Requesting data from the manufacturer would be a good idea though, it might be possible to avoid them.
10/4/2022 10:51:32 am
10/4/2022 10:58:26 am
There was I time where I thought it was just the flame spread index found in the data sheets, but it takes more than that for it to be considered non or limited combustible, as in the NFPA sections outlined by Dan above.
11/9/2022 07:07:25 am
I would guess that many wood ceiling products would be listed for the use and have some limited flame spread but a product cut sheet would be best.
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