Thanks Roland, Is the additional text intended to clarify the issue (that sprinklers are not required to be installed in skylights per 8.5.7), or create an exception to be referenced from 8.12.4? I only ask because it seems clear to me that this has been the design intent since at least the 2010 edition.
Mark at Aero 602 820-7894 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Wednesday, August 19, 2015 9:25 AM To: [email protected] Subject: Re: ESFR and Skylights The 2016 edition added text in 8.5 saying to ignore skylights and use the plane of the ceiling for defining distance below ceiling. Being in the general section, it applies to all types of sprinklers. 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 Aug 19, 2015, at 8:46 AM, <[email protected]> <[email protected]> > wrote: > > I have a specific question for the forumites and any 13 TC members willing to > weigh in on the issue. The question: "Is it acceptable to install an ESFR > sprinkler head directly below a skylight measuring 4'x8' (32 SF) where the > general area ceiling to deflector distance is 12" and the top of the skylight > to deflector distance is 24" up to 30"?" > > My path through NFPA 13 2010 Edition starts at 8.5.1, then 8.5.1.3, then > 8.5.4.1.1, 8.5.7, 8.5.7.1, and finally 8.12.4.1. > > Paraphrasing; > > 8.5.1 General - tells us that sprinklers shall be located, spaced, and > positioned properly. > 8.5.1.3 tells us that the requirements of 8.5.2 through 8.5.7 SHALL APPLY TO > ALL SPRINKLER TYPES (emphasis mine) unless modified by more restrictive > rules in 8.6 through 8.12. > 8.5.4.1.1 tells us the deflector distance to ceiling is determined by the > sprinkler type and construction type. > 8.5.7 Skylights, 8.5.7.1 and.2 tell us that we are not required to install > sprinkler heads in skylights (or ceiling pockets)meeting certain specific > requirements (which we do). > 8.12.4 ESFR Deflector Below Ceilings - Nothing in the text of this section > states an exception to 8.5.7.1. > > Any comments are appreciated. > > Mark at Aero > 602 820-7894 > _______________________________________________ > 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
