I’ve never seen a wood framed 3 hour fire rated shaft assembly or partition. A quick look at a USG Fire-Resistant Assembly catalog does not list one. This stairwell may not end up being built as you describe. Out of curiosity, can you tell us how this shaft is constructed and provide a tested listing number?
Allan Seidel St. Louis. MO > On Jun 24, 2021, at 5:16 AM, Bruce Hermanson via Sprinklerforum > <[email protected]> wrote: > > We have a wood framed building where the stair shaft is made of wood with > drywall that gives it a 3 hour fire rating. The stairs are steel and > concrete. > > I have been asked if we need to provide sprinkler heads at each level or > just at the top and below the lowest landing. We are currently in the 2013 > edition of NFPA 13. > > I am a bit confused on the wording in Section 8.15.3.1 where they reference > sprinklers beneath all stairways of combustible construction. Section > 8.15.3.2.1 references non combustible stair shafts having non combustible > stairs with non combustible or limited combustible finishes requiring > sprinklers only at the top and under the first accessible landing. I would > be interested in the forum's opinion on this. > > > > > > Bruce Hermanson > > President TSFP Holdings Inc. > > (734) 454-1350 > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
