There's no requirement for a brace on every piece, even in seismic zones. so the "safety of the installer" is a "best practices" argument, not a code one. 25' feet of riser on the west coast requires a four way at the top, just like wherever the ground doesn't move.
On Fri, Jun 13, 2014 at 1:31 PM, Brad Casterline <[email protected]> wrote: > I'm not sure how to answer that Ron. A co-worker was thinking if the max is > 25', there could be a piece with no support. The off-forum person said each > piece might be over-kill, but it is best for the safety of the installer. > > Brad > > -----Original Message----- > From: rongreenman . [mailto:[email protected]] > Sent: Friday, June 13, 2014 3:06 PM > To: [email protected] > Subject: Re: Support of tall risers > > What's your minimum Brad. When first posted I looked at the oldest handy 13 > I had (1985) and the only bracing reference was to seismic. How'd we get > the ubiquitous four way at the top of all risers except as good practice > from seismic applications? I'm open to suggestions of different > derivations. > > > On Fri, Jun 13, 2014 at 12:54 PM, Brad Casterline <[email protected] > > > wrote: > > > That's a great idea Ron, but for spec writing purposes it is probably > best > > to require as little as practical above the minimum, if at all ;) > > > > -----Original Message----- > > From: rongreenman . [mailto:[email protected]] > > Sent: Friday, June 13, 2014 2:34 PM > > To: [email protected] > > Subject: Re: Support of tall risers > > > > Why not just use EQ spacing and ignore the calculations. Apparently this > is > > just for stability. > > > > > > On Fri, Jun 13, 2014 at 12:24 PM, Brad Casterline < > [email protected] > > > > > wrote: > > > > > Thanks Jerry. We got some off-Forum feedback also and are convinced the > > > best > > > practice would be at least one support per piece, so are thinking max > > > spacing should be 21'-0". The feedback was from a contractor who does > > grain > > > elevators with VERY tall risers and they use half-lengths with a > support > > on > > > each piece! > > > > > > Brad > > > > > > -----Original Message----- > > > From: Jeremy Frazier [mailto:[email protected]] > > > Sent: Friday, June 13, 2014 2:01 PM > > > To: [email protected] > > > Subject: RE: Support of tall risers > > > > > > It depends, If it is a multi-story builing you need one at every > > alternate > > > level, offset, bottom, top and no more than 25'-0" apart. If it's not > a > > > multistory, just 1 hanger ring at the top of the riser within 24" > > > > > > -----Original Message----- > > > From: Sprinklerforum [mailto: > > > [email protected]] > > > On Behalf Of Brad Casterline > > > Sent: Friday, June 13, 2014 9:52 AM > > > To: [email protected] > > > Subject: Support of tall risers > > > > > > Where "seismic" is not required, and the riser is, say, 6" by 35 feet > > tall, > > > is there a requirement or rule of thumb for the vertical spacing for > the > > > support of it? > > > > > > A co-worker and I thank you in advance. > > > > > > > > > > > > Brad Casterline, NICET IV > > > > > > Fire Protection Division > > > > > > > > > > > > FSC, Inc. > > > > > > P: 913-722-3473 > > > > > > [email protected] > > > > > > www.fsc-inc.com > > > > > > > > > > > > Engineering Solutions for the Built Environment > > > > > > > > > > > > _______________________________________________ > > > Sprinklerforum mailing list > > > [email protected] > > > > > > > > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > > ______________________________________________________________________ > > > This email has been scanned by the Symantec Email Security.cloud > service. > > > For more information please visit http://www.symanteccloud.com > > > ______________________________________________________________________ > > > > > > _______________________________________________ > > > Sprinklerforum mailing list > > > [email protected] > > > > > > > > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > > _______________________________________________ > > > Sprinklerforum mailing list > > > [email protected] > > > > > > > > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > > > > > > > -- > > 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) > > > > A problem well stated is a problem half solved. -Charles F. Kettering, > > inventor and engineer (1876-1958) > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > > > > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > > > > > -- > 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) > > A problem well stated is a problem half solved. -Charles F. Kettering, > inventor and engineer (1876-1958) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- 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) A problem well stated is a problem half solved. -Charles F. 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