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
