Well ... 9.3 Protection of Piping Against Damage Where Subject to Earthquakes. 9.3.1* General. 9.3.1.1 Where water-based fire protection systems are required to be protected against damage from earthquakes, the requirements of Section 9.3 shall apply, unless the requirements of 9.3.1.2 are met.
9.3.5 has the 40/80 stuff and BL's are covered in 9.3.6. Only place I know of and you can't get to .5 and .6 until you get past 9.3.1.1. And you can only get there from IBC/ASCE 7 SDC C or higher. I'm all ears (well technically eyes in this forum) if you have some other sections I'm missing. Vast majority of US doesn't do any bracing. Working in MN I never saw one in 16 years until I started this job and work everywhere except MN. We just did a job in Boise and none required (which surprised me as I figured it was close enough to Yellowstone). Chris Cahill, PE* Senior Fire Protection Engineer, Aviation & Facilities Group Burns & McDonnell 8201 Norman Center Drive Bloomington, MN 55437 Phone: 952.656.3652 Fax: 952.229.2923 [email protected] www.burnsmcd.com Proud to be one of FORTUNE's 100 Best Companies to Work For *Registered in: MN -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ron Greenman Sent: Thursday, March 14, 2013 9:23 PM To: [email protected] Subject: Re: Seismic and ASCE 7 If you're asking me Chris, quite the contrary. It seems that everyone else is saying bracing only applies where performance per ASCE 7 is required, whereas I think the 40/80 tuff applies for everything except in seismic zones where more severe requirements apply. On Thu, Mar 14, 2013 at 7:03 PM, Cahill, Christopher <[email protected]>wrote: > Are you thinking sway bracing of mains and large BL's 9.3.5 vs. > restraint of BL's 9.3.6? Only applies when seismic is required 9.3. > > Chris Cahill, PE* > Senior Fire Protection Engineer, Aviation & Facilities Group Burns & > McDonnell > 8201 Norman Center Drive > Bloomington, MN 55437 > Phone: 952.656.3652 > Fax: 952.229.2923 > [email protected] > www.burnsmcd.com > > Proud to be one of FORTUNE's 100 Best Companies to Work For > *Registered in: MN > > > > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Ron Greenman > Sent: Thursday, March 14, 2013 8:57 PM > To: [email protected] > Subject: Re: Seismic and ASCE 7 > > Doesn't 13 require sway bracing on all systems and seismic bracing, > per the prescriptive methods of 13 that meet the performance criteria > of ASCE 7 or by engineering calculations per that same criteria, when > in a seismic zone that requires seismic bracing. Now that was a > mouthful but sway bracing and seismic bracing are very distinct things > in my mind. But then I may be misinterpreting. > > On Thu, Mar 14, 2013 at 6:42 PM, Chris Born <[email protected]> wrote: > > > My opinion is that sprinkler systems are not required to be braced > > under ASCE 7 in seismic design category B. ASCE 7 specifically > > exempts mechanical and electrical equipment in seismic design > > category B. I believe it appropriate to consider a sprinkler system > > under the same umbrella as mechanical and electrical systems. > > > > Mechanical and electrical systems are also exempt from seismic > > protection in seismic design category C, unless the importance > > factor is greater than 1. Because sprinkler systems have an > > importance factor of 1.5, they do require seismic protection in design > > category C. > > > > > > Christopher Born, P.E. > > Director, Fire Protection Engineering Clark Nexsen Norfolk, VA > > > > Sent from my iPad > > > > On Mar 14, 2013, at 6:03 PM, "Bob" <[email protected]> wrote: > > > > > There is a project that I am not involved in, but the AHJ called > > > for an opinion. The situation revolves around the idea that if a > > > building is in site class C and design category B, the sway > > > bracing requirements of > > NFPA 13 > > > are waved by ASCE 7. I have not come across this before, and > > > there is a certain fire sprinkler contractor that is eliminating > > > the sway bracing, retaining straps, etc... on several large > > > warehouse / distribution buildings. The claim is that ASCE 7 allows for > > > this. > > > Has anyone come across this and have information verifying or > > > negating it? I am meeting with several AHJ's in regard to this > > > tomorrow morning, so any input will > > be > > > extremely useful. > > > > > > Thank you, > > > > > > Bob Knight, CET III > > > 208-318-3057 > > > www.firebyknight.com > > > > > > > > > > > > > > > _______________________________________________ > > > Sprinklerforum mailing list > > > [email protected] > > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > > > > > -- > Ron Greenman > Instructor > Fire Protection Engineering Technology Bates Technical College > 1101 So. Yakima Ave. > Tacoma, WA 98405 > > [email protected] > > http://www.bates.ctc.edu/fireprotection/ > > 253.680.7346 > 253.576.9700 (cell) > > Member: > ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC > > They are happy men whose natures sort with their vocations. -Francis > Bacon, essayist, philosopher, and statesman (1561-1626) > -------------- next part -------------- An HTML attachment was > scrubbed... > URL: < > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attac > hments/20130314/a75973cc/attachment.html > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > -- Ron Greenman Instructor Fire Protection Engineering Technology Bates Technical College 1101 So. Yakima Ave. Tacoma, WA 98405 [email protected] http://www.bates.ctc.edu/fireprotection/ 253.680.7346 253.576.9700 (cell) Member: ASEE, SFPE, ASCET, NFPA, AFSA, NFSA, AFAA, NIBS, WSAFM, WFC, WFSC They are happy men whose natures sort with their vocations. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachments/20130314/d49cf496/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
