Our building code allows the pressure at the top most outlet to be less than 100psi if the building is sprinkled and a fire pump is not used to make the system work, city pressure only, but the pipe size of the standpipe must be sized to allow the fire department to provide the required flow.
So based on the above our system demand was 112psi @ 500gpm Thank You James Crawford Phaser Fire Protection Ltd. Phone 604-888-0318 Cel: 604-790-0938 Email [email protected] Web: www.phaserfire.ca -----Original Message----- From: Sprinklerforum <[email protected]> On Behalf Of Steve Leyton via Sprinklerforum Sent: Wednesday, November 25, 2020 9:16 AM To: [email protected] Cc: Steve Leyton <[email protected]>; [email protected] Subject: RE: Standpipe signage Yep. Steve Leyton (Sent from my smartphone; please excuse typos and voice-to-text corruptions.) -------- Original message -------- From: Travis Mack via Sprinklerforum <[email protected]> Date: 11/25/20 8:59 AM (GMT-08:00) To: [email protected] Cc: [email protected] Subject: RE: Standpipe signage Yes, we always include the note about the required flow/pressure required at the FDC inlet. I believe that requirement is straight from NFPA 14. As to your other question, if you have 100 psi needed at the top, how can you have a demand of 63 psi at the supply? Assuming this is a manual wet standpipe, then your supply is the FDC. And yes, you would need 100 psi + elevation pressure + friction losses. So you may need the 149 psi. It is dependent on your calcs. Travis Mack, CFPS, CWBSP, RME-G, SET Engineering Manager MFP Design 3356 E Vallejo Ct Gilbert, AZ 85298 NEW EXTENSION: 480-505-9271 ext. 700 NEW MOBILE: 480-272-2471 mailto:[email protected] www.mfpdesign.com<http://www.mfpdesign.com> Send large files to us via: https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.hightail.com%2Fu%2FMFPDesign&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=eGdMZGu2wXhUupGwgGTrqF3b54OP5%2BAZvlHhABSexWY%3D&reserved=0 LinkedIn: https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.linkedin.com%2Fin%2Ftravismack&data=02%7C01%7C%7C1121d49f9e6b4cf248f108d4df580e77%7C14e5497c16da42e69ffa77d19bafe511%7C0%7C0%7C636379016677342180&sdata=tT5E7LsZjSmyreKi4gDCa70EWN%2BZodi%2FhbeCbHNRijI%3D&reserved=0 “The bitterness of poor quality remains long after the sweetness of low price is forgotten.” Need/Want a faster way to check material pricing? Build a material quote? Check availability ? Searching for an invoice? *If you do not already have an account with ferguson.com, click https://www.ferguson.com/account-registration to register.* **Have a Ferguson account? Download the Ferguson app for on-the-go access to your favorite ferguson.com features. http://fergusoncommunications.us.newsweaver.com/hq7bgesq7f/1qtklpp37l9byeftyuoy12/external?email=true&a=6&p=2591775&t=517003 or http://fergusoncommunications.us.newsweaver.com/hq7bgesq7f/n1gewi5ud95byeftyuoy12/external?email=true&a=6&p=2591775&t=517003** From: Sprinklerforum <[email protected]> On Behalf Of James Crawford via Sprinklerforum Sent: Wednesday, November 25, 2020 9:49 AM To: [email protected] Cc: James Crawford <[email protected]> Subject: Standpipe signage Just throwing this out there, how many designers add a note to the drawings indicating the signage required at the fire department connection indicating the pressure required to deliver the standpipe system demand as per NFPA #14 section 6.4.5.2.2 (2016ed). On a second note we have a building that is sprinklered and has a standpipe and as such the standpipe demand when calculated is 63psi @ 500gpm at the top most outlets, so the pressure required to deliver this is 112psi at the inlet of the Siamese connection, this was what we put on the sign. I have been advised that this is wrong and the pressure would be 149psi at the inlet as this would then deliver 100psi at the hose valve. Comments? Thank You James Crawford Phaser Fire Protection Ltd. Phone 604-888-0318 Cel: 604-790-0938 Email mailto:[email protected]<mailto:[email protected]> Web: http://www.phaserfire.ca<http://www.phaserfire.ca> _______________________________________________ Sprinklerforum mailing list mailto:[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 _______________________________________________ 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
