NFPA 13, 11.1.6.3.1 (2016 ed.): “Where the system is a combined sprinkler/standpipe system (Class I or Class III) and the building is fully sprinklered in accordance with NFPA 13, no inside hose demand shall be required at any of the standpipe outlets.”
SL From: Sprinklerforum [mailto:[email protected]] On Behalf Of Mark Sornsin [FAR] Sent: Monday, March 25, 2019 10:36 AM To: '[email protected]' Subject: RE: Water Tank I there is a standpipe system supplied from the water tank then you’d have the opportunity to use hose streams so a hose demand should be added for the sprinkler design. But as you point out, if there’s a standpipe supplied by the water tank then you’d need to do separate calcs for both the standpipe and sprinkler design-with-hose-allowance. If there’s no standpipe and/or no hydrants supplied from the tank, then the hose allowance would not be required. [Visit our Website at www.SummitCoUS.com]<http://www.SummitCoUS.com> Mark Sornsin Sr. Fire Protection Engineer Direct: 701-499-1391 Cell: 701-526-8585 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Friday, March 22, 2019 5:35 PM To: [email protected] Subject: Re: Water Tank If the inference is that the presence of a standpipe system would impose a hose stream allowance on the sprinkler system demand, that isn't correct. However you would have to design for the standpipe demand or the sprinkler demand which ever is greater. Steve Leyton (Sent from my phone; please excuse typos and voice text corruptions.) -------- Original message -------- From: "Mark Sornsin [FAR]" <[email protected]> Date: 3/22/19 2:21 PM (GMT-08:00) To: "'[email protected]'" <[email protected]> Subject: RE: Water Tank If you DON’T have hydrants downstream, do you have a standpipe with hose connections and an automatic supply? I’m guessing not. If not then you don’t need the hose allowance (since there’s no place for hoses to be used). [Visit our Website at www.SummitCoUS.com]<http://www.SummitCoUS.com> Mark Sornsin Sr. Fire Protection Engineer Direct: 701-499-1391 Cell: 701-526-8585 From: Sprinklerforum [mailto:[email protected]] On Behalf Of Travis Mack Sent: Wednesday, March 20, 2019 8:57 AM To: [email protected] Subject: Re: Water Tank If you have hydrants downstream of the tank, do you need to account for site fire flow requirements? If so, you could be looking at 180k gallons and up. Travis Mack, CFPS, CWBSP, RME-G, SET 480-505-9271 MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone On Mar 20, 2019, at 6:45 AM, Brian Harris <[email protected]<mailto:[email protected]>> wrote: Looking for preliminary sizing for a water storage tank. Worst case for this particular building would be OH-2. (.2/1500 = 300gpm + 250 hose. 550gpm for a minimum of 60 minutes = 33,000 gallons). Per NFPA22 (2013) 5.1.3.1 round it up to 40,000 gallons. Does that sound about right? Brian Harris, CET BVS Systems Inc. Design Manager 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 ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________
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