Dewayne, Yes, the site class is one of the first steps in a process to determine the seismic design category, based on the procedure in ASCE7-05.
If you end up in seismic design category A or B, ASCE7-05 has no information on requirement for seismic bracing. If you end up in seismic design category C, ASCE7-05 requires that you provide seismic protection in accordance with the '02 edition of -13. If you end up in seismic design category D-E-F, ASCE7-05 requires that you provide seismic protection in accordance with the '02 edition of -13, and take into account the strength of the mains, and the horizontal force factors as noted in ASCE7-05. You are deemed to have met the latter requirement if you follow the 2007 NFPA-13 guidelines, or the 2010 NFPA-13 guidelines. Clear as mud, right? insert NFPA committee member disclaimer and so forth.... -- 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 Dewayne Martinez wrote: > Is the site class used to determine the design category? > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > [email protected] > Sent: Thursday, June 24, 2010 4:00 PM > To: [email protected] > Subject: RE: seismic design category > > Design category is your deciding factor. For an "A" category you should have > to do nothing special. > > But, a few years ago we had a similar situation with concrete anchors so it > could be an owner standard requirement not necessarily based on seismic > issues. > > Craig L. Prahl, CET > Fire Protection Specialist > Mechanical Department > CH2MHILL > Lockwood Greene > 1500 International Drive > 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 Dewayne > Martinez > Sent: Thursday, June 24, 2010 4:55 PM > To: [email protected] > Subject: seismic design category > > What is the difference between the "seismic site class" and the "seismic > design category"? > I have an engineer who is making us install "cracked concrete approved" > inserts based upon > a seismic site class C. The structural drawings also show a seismic design > category A. > I thought that the design category is what we use to determine if seismic > hangers are required? > Here is Wisconsin we don't see this so this I am a bit confused. > Thanks, > Dewayne > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.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) > > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.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)
