I thought (here, here for a test) -Site class was based on soil conditions (A-F, good to bad) -Occupancy category was the importance of the building after an incident (I-IV, i.e. guard house vs hospital. -Design Category uses the Site Class & Occupancy category information to come up with the "A-D" (little protection to heavy seismic consideration) -NFPA uses the Design Category for how to apply its rules (none, '02, or '07/'10) including if b-line restraint gets factored in along with sway brace.
All should be shown on the front page of the Structural drawings. You can download the USGS info here http://earthquake.usgs.gov/hazards/designmaps/javacalc.php which gives you the site class, SS values, and lots of other "can I buy a vowel" acronyms based on the lat/long of the site. The occupancy & design category is out of the building codes... This also might help to understand the process: http://www.nsicc.org/PDF_Files/Seismic%20Design%20Category%20_06%20IBC_.pdf D -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dewayne Martinez Sent: Thursday, June 24, 2010 2:11 PM To: [email protected] Subject: RE: seismic design category 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)
