Maybe I missed this, but the study, testing and report surprisingly does not acknowledge or mention the fact that many if not most cloud ceiling conditions are where the the ceiling above the clouds is the structural deck supported by beams and girders.
That structure can divide the above ceiling surface into compartments that can either hold or channel away combustion products from the gaps. The structural members above cloud ceilings are more likely to be deeper than normal because clouds are often architectural methods used to break up the ceiling expanse resulting from wide structural bays where the architecture wants to eliminate columns. A cloud ceiling in a small room, i.e. where the structure above might be less involved, may not be architecturally appealing and may be there as a primary result of a not so common HVAC concept. The test apparatus was in fact one reused from testing the effects of structural steel. They can put that steel back up and run the cloud tests again under more likely conditions to see how far the no steel conclusions can carry. Allan Seidel St. Louis, MO On Aug 8, 2013, at 9:18 AM, Brad Casterline <[email protected]> wrote: > http://www.nfpa.org/research/fire-protection-research-foundation/reports-and > -proceedings/suppression/other-sprinkler-protection/sprinkler-protection-for > -cloud-ceilings > > > > Brad Casterline, NICET IV > > Fire Protection Division > > > > FSC, Inc. > > P: 913-722-3473 > > [email protected] > > www.fsc-inc.com > > > > Engineering Solutions for the Built Environment > > > > _______________________________________________ > 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
