Ip of 1.0 is for the "structure". NFPA 15 reverts to 13 for bracing issues.
Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, April 21, 2008 3:00 PM To: [email protected] Subject: Re: Seismic bracing of sprinkler pipng in exterior tank farm Craig, Are you sure about the importance factor (Ip) being 1.0? In most of the work I've seen regarding fire sprinkler systems that value is 1.5. Also, what does the latest edition of NFPA-15 say? I'm just jumping to the conclusion of course that it's a fixed waterspray system. Interesting to be sure. PARSLEY CONSULTING Ken Wagoner, SET 760.745.6181 voice 760.745.0537 fax [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> e-mail www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website [EMAIL PROTECTED] wrote: > I have a tank farm with deluge sprinkler protection on the vessels, > steel pipe rack and supporting steel. The debate that has arisen is > whether this type of arrangement really needs to be seismically braced. > The issue is that it is not a structure, and not occupied. However the > materials within the tanks are flammable/combustible. > > Now to what degree of seismic resistance the structural steel and tank > supports are designed to is unknown. > > Is there an exemption for this type of installation? Based on the > information provided by structural, the occupied buildings would be > braced, no question there. But for exterior vessels, that is the > question. > > Soil Site Class = D > Occ. Class. = I > Seis. Des. Cat. = D > Structure Ip = 1.0 but might be argued to be 1.25 (Occ. Class II) > > Craig L. Prahl, CET > Fire Protection Group > Mechanical Department > CH2MHILL > Lockwood Greene > 1500 International Drive > PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - > 864.599.8439 [EMAIL PROTECTED] http://www.ch2m.com > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email > to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > > _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
