Larry / Roland: Thank you very much for your help. Your inputs are greatly appreciated. While the end result for the system coverage area remains the same, the original question highlights the danger that we all face in trying to make critical design decisions with incomplete or erroneous information regarding the proposed protected hazard. While I have been at this for quite a while, being a one man band, I miss having the ability to collaborate with co-workers on issues just like this. I heartily applaud AFSA for creating this forum and look forward to participating in the future.
Thanks Again, John Paulsen Crown Fire System Design, LLC 6282 Seeds Road Grove City, OH 43123 P - 614-782-2438 F - 614-782-2374 C - 614-348-8206 Email - [email protected] -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Wednesday, November 11, 2015 6:59 PM To: [email protected] Subject: Re: General Storage A perfect example on getting an accurate assignment on the commodity as a first step. Hard to argue with Larry on this stuff but after sitting on NFPA 13 with him for 20 years. one has to try occasionally. Roland Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Nov 11, 2015, at 2:42 PM, Larry Keeping <[email protected]> wrote: > > I've been watching this thread and though that I'd put my oar in. > > The message that started the conversation referenced storage of PVC to a height of 8 ft. As per the examples in Table A.5.6.3 and Table A.5.6.3.3, PVC can be considered a Class III commoditiy (There might be an exception if it is highly plasticized, there used to be but I can't find it today). However, with the Class III designation to less than 12 ft storage it could be protected per Table 13.2.1 via the OH2 curve of Figure 13.2.1. > > The 40000 sq ft system size requirement is for Section 8.2.1(3) extra hazard and for Section 8.2.1(4) high piled storage, so it wouldn't apply to this scenario. (In the new 2016 edition that would be identified as "low piled storage".) > > Section 13.2.2 permits installation by NFPA 13 and design criteria and modifiers as ... Chapter 11 for ordinary hazard ... > So that should throw you back to Section 8.2.1(2). Therefore a system size of 52000 sq ft would be acceptable, even if the whole facility was used for that storage configuration. > > Larry Keeping _______________________________________________ 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
