A situation that's new to me, I'd like to verify design criteria before proceeding:
I'm working on a multi-story building with internal stairways. Applicable building code is IBC (2012). The architect has elected to not enclose the 4th floor (top floor) of one of the stairs and is citing IBC section 1009.3 Exception 3. In part, that section reads ". . . the opening is protected by a draft curtain and closely spaced sprinkles in accordance with NFPA 13." The layout of closely spaced sprinkles is simple enough (NFPA 13 2010 section 8.15.4), but I'd like to verify the calculation requirements. NFPA 13 2010 sections 11.3.3.3 and 11.3.3.4 say to add the demand of the closely spaced sprinklers to the demand of the ceiling sprinklers - i.e., include both sets of operating sprinks in the same calc. That's how I read it, anybody have a different interpretation? Ed Kramer Lawrence, KS _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
