Usually. The only real-world exception that comes to mind would be if you a relatively small building of fire resistive construction and a very demanding sprinkler system such as for H-occupancies or really demanding storage. I could see a situation where you had a 2,000gpm-or-less fire flow (at 20psi) and a +2000gpm CMSA including 500gpm hose, but it would be a pretty weird-looking or very hazardously loaded building.
Steve -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Ron Greenman Sent: Monday, May 13, 2013 10:37 AM To: [email protected] Subject: Re: Sizing tanks with hydrants? Won't fire flow always exceed sprinkies and hose allowance? On Mon, May 13, 2013 at 10:35 AM, Steve Leyton <[email protected]>wrote: > That's only part of it: you size the tank for the greater of > (sprinklers + HSA) or the fire flow demand, whichever is greater when > calculated as flow x duration. > > Steve L. > > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Jack Carlson > Sent: Monday, May 13, 2013 10:31 AM > To: [email protected] > Subject: RE: Sizing tanks with hydrants? > > > Yes - Tank serves sprinklers and hydrants > > NFPA 13 2010 edition > > Figure 11.2.3.1.1 .20/1500 > > Table 11.2.3.1.2 250 hose for 60 minutes min (assume > remote supervision) > > > Jack W. Carlson, SET > Triple "A" Fire Protection > Office - 251.649.2034 > Fax - 251.649.2037 > Cell - 706.247.5050 > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Bobby Gillett > Sent: Monday, May 13, 2013 1:19 PM > To: [email protected] > Subject: Sizing tanks with hydrants? > > When sizing a water storage tank feeding a fire pump for a new > facility with multiple sprinkler systems and fire hydrants, do you > have to include any type of allowance for the hydrants? The tank will > be the sole source of supply for all (rural area). There will be no > hose stations or standpipes, only interior sprinkler systems - OH > Group II with monitored alarms. > Typically this would be an 18,000 gallon tank minimum (.20x1500x60 > mins). I don't see anywhere that requires this, just making sure. > > > > Thank you in advance. > > > > Bobby Gillett > > Sr. Project Manager > > Key Fire Protection, Inc. > > (731) 424-0130 office (731) 424-9285 fax > > (731) 267-4853 cell > > <http://www.keyfireprotection.com> www.keyfireprotection.com > > > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er > .org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er > .org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl > er.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) _______________________________________________ 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
