Excellent, thank you. Thank you,
Brian Harris, CET BVS Systems Inc. From: Steve Leyton <[email protected]> Sent: Wednesday, November 29, 2023 4:23 PM To: Discussion list on issues relating to automatic fire sprinklers <[email protected]> Subject: [Sprinklerforum] Re: 2 Most Remote Hose Valves For Standpipe Calc The letter and intent of the standard is to calculate 500 GPM from the 2 most demanding hose connections on the hydraulically remote standpipe, then add 250 GPM at the connection point to the feed main serving the additional standpipes, up to the required maximum flow rate for the building. If the remote standpipe has a 2-way roof header, we take it there (also, it's a practice that's enforced by just about every AHJ in California). If you have only one hose connection at the top of the remote SP, then take 250 at that one and 250 from the next-most remote one and run your 500 back to the feed main that way. I hope this answers your question, otherwise I'm not understanding it clearly. The foregoing is my opinion only and does not represent NFPA or the NFPA 14 Technical Committee, nor intended to serve as an interpretation of the standard. Protection Design and Consulting Steve Leyton, President T | 619.255.8964 x 102 | www.protectiondesign.com<http://www.protectiondesign.com/> 2851 Camino Del Rio South | Suite 210 | San Diego, CA 92108 Fire Protection System Design | Consulting | Planning | Training From: Brian Harris <[email protected]<mailto:[email protected]>> Sent: Wednesday, November 29, 2023 1:06 PM To: [email protected]<mailto:[email protected]> Subject: [Sprinklerforum] 2 Most Remote Hose Valves For Standpipe Calc At one point calculating a standpipe meant having (2) hose valves on the same floor and then calculating (1) each on the other standpipes as needed. Is the current train of thought adding the "extra" valve on the most remote standpipe not required and just catching one on the floor below good enough? Thank you, Brian Harris, CET BVS Systems Inc. bvssystemsinc.com<http://bvssystemsinc.com/> Phone: 704.896.9989 Fax: 704.896.1935
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