Actually they were concerned that people would apply the shadow to obstructions such as ductwork vs. the 3 or 4 times rule. At least that is how I remember it
Peter Schwab VP of Purchasing and Engineering technologies Wayne Automatic Fire Sprinklers Inc. 222 Capitol Court Ocoee, Fl 34761 Mobile: (407) 468-8248 Direct: (407) 877-5570 Fax: (407) 656-8026 www.waynefire.com -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Thursday, April 23, 2015 3:29 PM To: [email protected] Subject: Re: Corridor shadow areas the 13 committee rejected attempts to add a max shadowed area similar to 13R because it was too RESTRICTIVE. Roland Huggins, PE - VP Engineering American Fire Sprinkler Assn. --- Fire Sprinklers Saves Lives Dallas, TX http://www.firesprinkler.org <http://www.firesprinkler.org/> > On Apr 23, 2015, at 10:59 AM, Ben Young <[email protected]> wrote: > > Larry, > > Thanks, I found it in the 2013 ROC, comment 13-143. Its a shame, > because it sounds like they agreed but didn't like the backwall part > for some other reason. McPhee's commentary in 13-135 would have made > the appendix language include areas behind sidewalls, but without > something like that, I have an AHJ basically telling me that this > scenario is only allowed in a 13R installation. My indentations > aren't even as severe as those shown, they're only 12" deep by 5 feet > wide! Oh well, I guess have something to submit next cycle now. > > > Benjamin Young > > On Thu, Apr 23, 2015 at 12:45 PM, Larry Keeping <[email protected]> > wrote: > >> The illustration that was first submitted for their consideration, >> was adjusted by the Technical Committee before it was accepted for >> addition into NFPA 13. The original submission showed a 9 ft wide by >> 2 ft deep entry vestibule on both sides of the corridor. I believe >> that when the figure was revised the "2 ft 0 in. max." should have been >> edited out. >> >> Larry Keeping >> >> -----Original Message----- >> From: Sprinklerforum [mailto: >> [email protected]] On Behalf Of Ben >> Young >> Sent: April-23-15 12:01 PM >> To: [email protected] >> Subject: Corridor shadow areas >> >> Does anyone know if there's an error with figure A.8.1.1(3)(a) in the >> 2013 edition of NFPA 13? >> There appears to be an extraneous bit at the bottom that says '2 ft 0in. >> max' >> >> It looks like this is a holdover from a modification made to figure >> 6.4.6.3.3.2 in the 2013 edition of NFPA 13R. >> >> I'm wondering if the bottom of the figure accidentally got chopped >> off in the 13 version of the figure, and that the shadow areas behind >> the sidewalls in a hallway are allowed in a 13 system as well as a 13R >> system. >> >> I checked the 2016 first and second draft reports but didn't see any >> comments or proposals regarding this, though. >> >> Is this just wishful thinking on my part, or did someone goof up when >> they put the figure in? >> >> Any thoughts? >> >> Benjamin Young >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >> ler.org _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >> ler.org >> > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.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
