Size it as a break tank. Take the volume needed for your duration minus the volume available from the supply. The difference would be your minimum tank volume.
Thomas R. Worley Estimator/Design Manager Fire Foe Corp. 999 Trumbull Ave. Girard, OH 44420 P: 330-759-9834 x112 F: 330-759-8949 E: [email protected]<mailto:[email protected]> [cid:[email protected]]<http://www.firefoe.com/> From: Brian Harris <[email protected]> Sent: Monday, July 1, 2024 7:53 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Re: Water Tank for Standpipe Travis- Yes, & yes. My question was since the system was designed and installed the water supply now is about 3/4 of what it was. We are looking to supplement the city supply with a water tank since the fire truck shuts down before we can get the 1000gpm. The city supply is running out of water. I was curious as to the sizing of a supplemental tank. I see if it's only supplied by a tank, it needs a 30-minute duration. Since the city is capable of supplying "most" of the demand I looking for the best way would be to properly size a tank. Thank you, Brian Harris, CET BVS Systems Inc. From: Travis Mack <[email protected]<mailto:[email protected]>> Sent: Monday, July 1, 2024 7:45 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: Water Tank for Standpipe I doubt that school is tall enough to be a high rise. Manual is allowed per NFPA 14. Do you know what a manual standpipe is? If so, contact the AHJ to find out what they require you use as a supply value. A manual standpipe has its supply as the FDC. So calculate as the FDC as your supply with the values the ahj provides. It's likely going to be something like 150 psi at 1000 gpm. Travis Mack, SET M.E.P.CAD | 181 N. Arroyo Grande Blvd. #105 I Henderson, NV 89074 www.mepcad.com<http://www.mepcad.com/> | m: 480.547.9348 AutoSPRINK | AutoSPRINK FAB | AutoSPRINK RVT | AlarmCAD Book appointment time in my calendar https://calendly.com/t_mack_mepcad ________________________________ From: Brian Harris <[email protected]<mailto:[email protected]>> Sent: Monday, July 1, 2024 4:38:05 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: Water Tank for Standpipe Yasser Thank you, Brian Harris, CET BVS Systems Inc. From: Yasser Amer Ahmed <[email protected]<mailto:[email protected]>> Sent: Monday, July 1, 2024 6:44 AM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: Water Tank for Standpipe Hi Brian, As per NFPA-14, 5.2 (2024 Ed.) 5.2 Minimum Supply for Class I, Class D, and Class III Systems. The minimum water supply shall be capable of providing the system de1nand established by Chapter 10 for at least 30 minutes. All Gratitude, Yasser Amer Ahmed Fire Protection & Plumbing Specialist Registered Fire Protection Consultant MBA, LEED AP BD+C(tm), CPD, CFPS, MIFireE, PMSFPE [cid:[email protected]] Smart Village, Cairo-Alexandria Desert Road Street 26, Building 10 P.O. Box: 129, Giza 12577, Egypt Tel: +202 3531 8000 Fax: +202 3537 1223 dar.com<https://urldefense.proofpoint.com/v2/url?u=http-3A__dar.com_&d=DwMFAg&c=0YGvTs3tT-VMy8_v51yLDw&r=BPv183lhQEq9N7uN6BtSUYy-qO1aQth8MfS3CXy9v8o&m=AwHdiOGHCF__Z72zfS9hXpv57AcrHPsoC4nxS7tvlkY&s=RZxKhKFy24ZwTQD2ONzIVG3oH1WAdGB-GK2L6HoX0Fs&e=> [cid:[email protected]]<https://urldefense.proofpoint.com/v2/url?u=http-3A__dar.com_&d=DwMFAg&c=0YGvTs3tT-VMy8_v51yLDw&r=BPv183lhQEq9N7uN6BtSUYy-qO1aQth8MfS3CXy9v8o&m=AwHdiOGHCF__Z72zfS9hXpv57AcrHPsoC4nxS7tvlkY&s=RZxKhKFy24ZwTQD2ONzIVG3oH1WAdGB-GK2L6HoX0Fs&e=> Please consider the environment before printing this document From: Travis Mack <[email protected]<mailto:[email protected]>> Sent: Monday, July 1, 2024 1:34 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Re: Water Tank for Standpipe ! External Email, Use Caution ! Is it a high rise or mid rise? If mid rise, calc it to the FDC and be done. If a high rise and automatic standpipe, check NFPA 14. The duration is 30 minutes. So that is how you would size a tank. Travis Mack, SET M.E.P.CAD | 181 N. Arroyo Grande Blvd. #105 I Henderson, NV 89074 www.mepcad.com<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fwww.mepcad.com%2f&c=E,1,-4N2RZKUba_tdy65g6bmxh0QKzZyB4IFxh7FewvPS08dfMil9SJ7e-nULD3iv8Tco6tXDK1EfeIYVTl6v8gt_jeh3nwQJShLejhSBFPVdWqVOxQnapv-TMIHA6g,&typo=1> | m: 480.547.9348 AutoSPRINK | AutoSPRINK FAB | AutoSPRINK RVT | AlarmCAD Book appointment time in my calendar https://calendly.com/t_mack_mepcad ________________________________ From: Brian Harris <[email protected]<mailto:[email protected]>> Sent: Monday, July 1, 2024 3:31:59 AM To: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> Subject: [Sprinklerforum] Water Tank for Standpipe We have a project where the water supply has degraded a good bit since installation was completed. Sprinkler system and pump test all pass but the standpipe test runs out of water. Only thing I can think of to help would be a water tank but how would you even size one since the "duration" of a standpipe test is open ended? Any other thoughts? Thank you, Brian Harris, CET BVS Systems Inc. bvssystemsinc.com<https://linkprotect.cudasvc.com/url?a=http%3a%2f%2fbvssystemsinc.com%2f&c=E,1,DxViP7dSzV-R2rx5fGIyoL1vsDK_tTbfrJamJJsCEkhMVaCVUXX3uMknt5ksggBpEfXELKFUusTuDEcjOcvs4e1Xf-ZA6si2AAvUiof7pgyIcg,,&typo=1> Phone: 704.896.9989 Fax: 704.896.1935 ________________________________ Confidentiality & Disclaimer Note: This e-mail (including any attachments) contain protected and confidential information intended for the sole use of the individual or organization addressee. If you are not the addressee or an authorized agent acting on their behalf, or if you have received this message by error, please notify the sender immediately be returning the message. 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