Rich, I think the supplement provides a great deal of clarification, if what Joe Powell's question dealt with was "Does the IBC allow NFPA-13 criteria to be used for seismic protection".
I understand your reference regarding the oversize rings, but I think it's relevant to note that the section you're quoting is a part of ceiling requirements, not seismic protection of sprinkler systems, with one exception. Item (e) in 13.5.6.2.2 requires the 2" oversize ring for sprinkler penetrations in ceilings which are not rigidly braced (see the exception to item (b)). Information we've received suggests that ceilings in seismic design categories D-E-F are going to be required by ASTM C635 and ASTM C636 are going to require rigid bracing of the ceiling components, which would eliminate the need for the 2" oversize ring. The important distinction here is that the ASCE7 reference is not for rigid bracing of the drops to the sprinklers, but rather to the ceiling itself. -- PARSLEY CONSULTING Ken Wagoner, SET 760.745.6181 voice 760.745.0537 fax R Richardson wrote: > Even with the new language in the supplement as referenced by Steve, > the issue is not clear. > > The language in the supplement indicates that NFPA 13 is essentially > equivalent to section 13.6.8 of ASCE. > > However, the requirement for 2 in. oversized rings is not in section > 13.6.8. It is in section 13.5.6.2.2, and that section still speaks to > sprinkler heads thought suspended ceilings needing 2 in. rings. > > Not that I am an advocate of the 2 in. ring, we haven't really even > enforced it yet thinking it was going to go away, but it seems to > still be required. > > Rich Richardson > Seattle Fire Department > >>>> "Steve Leyton" <[email protected]> 03/13/2009 13:29 >>> > I call Jeff a little while ago to thank him for that post; if you have > interest in this issue, there is free download at ICC's web site (you do > not have to be a member). > > http://www.iccsafe.org/cs/codes/2007-08cycle/2007Supplement/IBC07S.pdf > > The clarification is in new section 1613.6.3, page 128 of the supplement > (page 132 of the PDF). > > Steve Leyton > Protection Design & Consulting > San Diego, CA _______________________________________________ Sprinklerforum mailing list http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
