How about the spray booth for a 747 Brad? Or a B-52? On Mon, Aug 8, 2016 at 5:38 PM, Brad Casterline <[email protected]> wrote:
> Show me a spray booth with forty sprinklers Steve > On Aug 8, 2016 7:36 PM, "Steve Leyton" <[email protected]> wrote: > >> Sure. And fires that can be spread by running fuel such as plastics and >> FCL’s (not to mention BLEVE’s) can set off 40 standard response sprinklers >> in a minute. I can only imagine the sheer volume of responding sprinklers >> and skipping that could occur based on how smooth or bumpy the roof/ceiling >> assembly is if you started wantonly plugging QR control-mode sprinklers >> into EH fires. (On paper) MDD = .80 ADD = .275 >> >> >> >> My opinion only, >> >> Steve L. >> >> >> >> >> >> >> >> *From:* Sprinklerforum [mailto:sprinklerforum-bounces >> @lists.firesprinkler.org] *On Behalf Of *Brad Casterline >> *Sent:* Monday, August 08, 2016 5:17 PM >> *To:* [email protected] >> *Subject:* Re: Paint spray application >> >> >> >> 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 >> >> _______________________________________________ >> 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 > > -- Ron Greenman 4110 Olson Dr., NW Gig Harbor, WA 98335 [email protected] 253.576.9700 The Universe is monstrously indifferent to the presence of man. -Werner Herzog, screenwriter, film director, author, actor and opera director (1942-)
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