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
