Shakey ground is all i have ever known Ken. I am no more a professional than you are. THINK MAN! small spaces with fast fires need the fastest acting sprinklers we can muster. I've been in court myself a couple times- neither one over sprinklers though-- please stop being so stodgy! On Aug 8, 2016 7:05 PM, "Parsley Consulting" <[email protected]> wrote:
> I don't know, Brad. You're standing on pretty shaky ground there. > > The decision to use QR sprinklers in an extra hazard occpuancy is a direct > contradiction to 8.4.1.1.2 of NFPA 13, including the 2016 edition, or a > similar section number, at least as far back as the 1999 edition. If you > install QR sprinklers in a space that is legitimately classed as an extra > hazard occupancy, aren't you directly contradicting this particular section > of NFPA 13? The handbook provides the following explanatory text on the > topic: > > Extra hazard occupancies are characterized by the probability of > fast-developing fires with high heat release rates that have the potential > to open a large number of quick-response sprinklers before the sprinklers > have time to control the fire. The operation of a large number of > sprinklers in a relatively short time period has the potential to overtax > the system. For this reason, quick-response sprinklers using the area > design method of Chapter 11 are not permitted for the protection of extra > hazard occupancies. Additional perspective on this can be found in the > discussion of safety margin found in B.2.1. > > Further, I'm not aware of any QR sprinkler which has been tested and > listed by an NRTL for use in protecting extra hazard occupancies. Barring > that, to follow the guidance you're suggesting the > contractor/designer/installer has to violate both NFPA 13 AND the listing > of the sprinkler. I'm not suggesting the gloom and doom drama of "people > could die", however it does concern me greatly when I read suggestions to > ignore both texts. > > My thought about that is to make sure your insurance is paid up, and have > a good lawyer on retainer. I don't know of a good defense while sitting in > the witness chair to a question similar to, "Are you telling me you ignored > the applicable law and the manufacturer's recommendations for the > installation of that sprinkler?" > > When I have nightmares I think about having to answer questions similar to > that. > > *Ken Wagoner, SET Parsley Consulting* > > > > * 350 West 9th Avenue, Suite 206 Escondido, California 92025 Phone > 760-745-6181 <760-745-6181> Visit our website > <http://www.parsleyconsulting.com/> * > > On 08/08/2016 4:17 PM, Brad Casterline wrote: > > We're not suppose to use QR in EH either but I say balderdash. > That is for big open spaces beacase you could have a bunch of heads going > off way over there when the emergency is way over here. Small spaces with > fast fires are better off if you use low temp qr and calc every head > possible going off > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler. > org > >
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