Not to prolong the prolongation but ... Galen's comments were based in part on CA amendments, so like much of what we discuss here in the forum, there isn't necessarily one global solution. I'm not sure as to what other states may do, but generally the applicability of 13R is governed by construction type and whether or not the sprinklers are counted as a substitution or not. Once common miss is that 13R systems are used (or proposed) in buildings taking an additional story and the building code says you can't do that, it must be 13. As to the specifics of the thread, you are - of course - technically correct in that you pick a design basis and stay with it. But in the case of this basement I'm still not understanding of the compartmentalization or reduction in density issues that have been raised. Whether the BOD is 13R or 13 is irrelevant: it's an area outside the dwelling unit, it's not misc. storage (an accessory use) it's GENERAL storage (a dedicated use) and every way I look at it the design comes back to OH2 per NFPA 13.
The foregoing is my opinion only and does not necessarily represent the opinion or intent of the NFPA 13D/13R Technical Committee on Residential Sprinkler Systems. Steve Leyton Protection Design & Consulting San Diego, CA -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mark Sornsin Sent: Thursday, September 20, 2012 10:53 AM To: [email protected] Subject: RE: Excellent comments from a smart guy Not to prolong this discussion, but... " Basement Storage in Multi-Residential: According to the Building ode the common storage area located in the basement of a Group R-2 multi-residential building such as apartments or condos would be a Group -1 occupancy which must be separated from the R-2 by one-hour fire barriers. While the R-2 may be protected by a 13R system, the S-1 must e protected by a full 13 system. " Isn't it more accurate to say that given the S-1 occupancy in the basement, and R-2 on the floors above, the system is to be designed to NFPA 13R, with the storage areas getting their protection criteria from NFPA 13? The point being: you don't design a building to both NFPA 13 and 13R. It sounds like semantics, but it more than that because being part of a larger NFPA 13R building, that storage area does NOT necessitate all of the design requirements of NFPA 13. Mark A. Sornsin, PE| Fire Protection Engineer Ulteig Engineers, Inc.| Fargo, ND [email protected] _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
