Agreed. By cumulative, I meant the largest single building demand and whatever additional flow is needed for adjacent hydrants. In refinery settings, this is all appurtenances and systems that are expected to be used during the single, most demanding fire event which likely exceeds a single building.
Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Senior Fire Protection Engineer O 952-656-3662 \ M 320-250-5404 \ F 952-229-2923 [email protected] \ burnsmcd.com<http://www.burnsmcd.com/> 8201 Norman Center Drive, Suite 300 \ Bloomington, MN 55437 *Registered in: MN, PA, & TX **NICET IV - Water-Based Systems Layout From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Thursday, May 19, 2016 10:23 AM To: [email protected] Subject: RE: Fire Flow Right but your comment could be misread as to mean that fire flow for a multi building campus is based on multiple buildings. To be clear, fire flow requirements are based on the largest (or most demanding by construction type if not the largest) building on a site when there is more than one. It is not cumulative. Steve -------- Original message -------- From: "Hinson, Ryan" <[email protected]<mailto:[email protected]>> Date: 5/19/16 7:30 AM (GMT-08:00) To: [email protected]<mailto:[email protected]> Subject: RE: Fire Flow Your building sprinkler feed is just that...a sprinkler feed which should be hydraulically calculated if minimum sizing is desired. Otherwise, A fire flow does not ONLY come through this line, it cumulative in the vicinity. Fire flows are for overall requirements of all adjacent hydrants off the looped main which serves both your building as well as others in the proximity. Fire flow must always meet (but will normally exceed) a single building's sprinkler demand IMO. Ryan L. Hinson, PE*, SET** \ Burns & McDonnell Senior Fire Protection Engineer O 952-656-3662 \ M 320-250-5404 \ F 952-229-2923 [email protected]<mailto:[email protected]> \ burnsmcd.com<http://www.burnsmcd.com/> 8201 Norman Center Drive, Suite 300 \ Bloomington, MN 55437 *Registered in: MN, PA, & TX **NICET IV - Water-Based Systems Layout From: Sprinklerforum [mailto:[email protected]] On Behalf Of Brian Harris Sent: Thursday, May 19, 2016 9:21 AM To: [email protected]<mailto:[email protected]> Subject: RE: Fire Flow Steve- Thanks for the help, I think I got it from here..... Brian Harris, CET BVS Systems Inc. bvssytemsinc.com<http://bvssystemsinc.com/> From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Thursday, May 19, 2016 10:02 AM To: [email protected]<mailto:[email protected]> Subject: RE: Fire Flow It's like sprinkler hydraulics in that the size of the piping may have to be calculated, which is based on the available flow and pressure from whatever water supply you're starting with. Usually, and I emphasize usually but not always, a 6-inch lateral is adequate for a single hydrant but not if its 450 feet long. Steve -------- Original message -------- From: Brian Harris <[email protected]<mailto:[email protected]>> Date: 5/19/16 6:48 AM (GMT-08:00) To: [email protected]<mailto:[email protected]> Subject: RE: Fire Flow Got it, thanks. I see where this particular project requires 1500 gpm @ 20 psi for 2 hours, what is needed to translate that into required underground/tap size? Brian Harris, CET BVS Systems Inc. bvssytemsinc.com<http://bvssystemsinc.com/> From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected]<mailto:[email protected]> Sent: Thursday, May 19, 2016 9:44 AM To: [email protected]<mailto:[email protected]> Subject: Re: Fire Flow In the IFC it is table B 105.2 i believe. Mark at Aero 602 820-7894 Sent from my iPad On May 19, 2016, at 5:56 AM, Brian Harris <[email protected]<mailto:[email protected]>> wrote: Does anybody have a spreadsheet or pdf they'd care to share that is used to calculate fire flow demand for a project site & determine underground/tap sizes? Brian Harris, CET BVS Systems Inc. Sprinkler Division bvssystemsinc.com<http://bvssystemsinc.com/> Phone: 704.896.9989 Fax: 704.896.1935 _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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