These limitations need to go away. They're based on pipe schedules, and not because the limitations are true , but merely because the schedule stops at 400 heads. In the days when schedules were developed 52K was a really big building.
On Mon, Jan 2, 2012 at 10:48 AM, Matt Grise <[email protected]> wrote: > Now that FM allows 60ksf, I have had more success convincing AHJ's that > sprinkler systems still work when they exceed 52K. > > Matt Grisé PE*, LEED AP > Sales Engineer > Alliance Fire Protection > 130 w 9th Ave. > North Kansas City, MO 64116 > > *Licensed in KS & MO > > 913.888.0647 ph > 913.888.0618 f > 913.927.0222 cell > www. AFPsprink.com > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Todd - FPDC > Sent: Monday, January 02, 2012 12:46 PM > To: [email protected] > Subject: Re: 52,000 square feet > > Chris, I agree is that is what the Code says. However, the 52000 is an > arbitrary number and has no real impact on protection. For a couple of > thousand square feet, I wouldn't have a big problem suggesting it. Probably > 3k max. > > Sent from my iPhone > > On Jan 2, 2012, at 12:46 PM, "Cahill, Christopher" <[email protected]> > wrote: > > > As a former AHJ many requests, all denied with I agree it's silly but > it's the law. > > > > As a former contractor wanted to make such requests but never did > because it's not compliant with the law. > > > > As a current consultant would only make such request if specifically > instructed by the client over my clearly documented objections. (with the > hope the AHJ would back the law) > > > > And I don't think one can put a 52,000 sq.ft. aux dry system off a > 52,000 sq.ft. wet system as an example. The combined systems are still > limited to 52,000 sq.ft. So adding a control valve and flow switch at the > additions off the existing isn't going to help. > > > > As any role would suggest if you can easier cut off 6,000 sq.ft. near > the riser and turn that into its own system. Avoids the long run and then > add the new 6,000 to the end. > > > > Chris Cahill, PE* > > Senior Fire Protection Engineer > > Aviation & Facilities Group > > Burns & McDonnell > > P: 952.656.3652 > > F: 952.229.2923 > > [email protected] > > www.burnsmcd.com > > *Lic. in MN > > > > > > -----Original Message----- > > From: [email protected] [mailto: > [email protected]] On Behalf Of Bob > > Sent: Monday, January 02, 2012 11:31 AM > > To: [email protected] > > Subject: RE: 52,000 square feet > > > > Greg, > > I think that option two would be ok. It seems that it's ok to have an > auxiliary dry system off the end of a wet system, so an auxiliary wet > system should work as well. > > > > > > > > Bob Knight, CET III > > 208-318-3057 > > www.firebyknight.com > > > > > > > > -----Original Message----- > > From: [email protected] > > [mailto:[email protected]] On Behalf Of Greg > McGahan > > Sent: Monday, January 02, 2012 10:04 AM > > To: [email protected] > > Subject: 52,000 square feet > > > > We have a school that is getting 2 small additions at the end of the > wings of approx. 6,000 and 3,000 sqft respectively. If we tried to tie on > to the end of one system to feed the larger addition, that system would be > approximately 56,000 sqft. Th other two options (I guess) would be to run > 250' of 3" back to the main riser and create a new system for this > addition, or use it for both additions with another 300' or so of main, or > maybe to put in a new control valve and flow switch at each addition to > supply them. > > I am not sure if the second option would meet the intent of the code and > I am too confused to figure this out this early in the year. > > > > The other addition appears to be on a system that is already about > 53,000 sqft and adding the addition would also put it around the 56,000 > mark. > > > > Has anybody ever asked for a variance on something like this? It > honestly doesn't make any sense to put it in a separate system (other than > to meet > > code) because the operation of the system will not actually be effected. > > Especially in the way these systems are shaped, there are several > different fire rated zones of much smaller area. > > > > Happy New Year and thanks, > > > > -- > > Greg McGahan > > Living Water Fire Protection, LLC <http://www.livingwaterfp.com> > > 1160 McKenzie Road > > Cantonment, FL 32533 > > 850-937-1850 > > fax 850-937-1852 > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > http://fireball.firesprinkler.org/mailman/private/sprinklerforum/attachment > > s/20120102/1eb1176e/attachment.html> > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2012.0.1901 / Virus Database: 2109/4718 - Release Date: 01/02/12 > > > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > _______________________________________________ > > Sprinklerforum mailing list > > [email protected] > > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > _______________________________________________ > 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 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/20120103/c5838ccd/attachment.html> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
