Don't agree if it's a Class I standpipe. There are two demands that should be considered in a sprinklered building that is also furnished with standpipes - the sprinkler demand and the standpipe demand. The next branch in the decision tree is whether or not the standpipe system is automatic or manual. Both 13 and 14 prescribe that we consider which demand is higher - sprinkler or standpipe - and design our water supply for that service point, but not both concurrently. However, if the standpipe is a manual one, then you would design your automatic water supply for sprinklers only and prove that the FDC can supply the system to the 100 PSI residual at the remote outlets, presuming it's a Class I. If it's a Class II or III, then you would also have to account for the automatic water supply of the Class II components if the building is furnished with hose stations.
The foregoing is my opinion only and does not necessarily represent the opinion or intent of the NFPA 14 Technical Committee on Standpipe and Hose Systems. Steve Leyton Protection Design & Consulting San Diego, CA -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, June 16, 2015 8:39 AM To: [email protected] Subject: RE: 3 story building with standpipe and pump Not uncommon when you have a 100 psi remote outlet requirement on the standpipe and the water supply can't deliver that. Install the pump on the standpipe system to compensate for the deficiency. Craig L. Prahl Fire Protection Group Lead CH2MHILL Lockwood Greene 1500 International Drive Spartanburg, SC 29303 Direct - 864.599.4102 Fax - 864.599.8439 CH2MHILL Extension 74102 [email protected] -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Joe Sent: Tuesday, June 16, 2015 10:58 AM To: [email protected] Subject: 3 story building with standpipe and pump Gentlemen, I just toured a building with a standpipe and small booster pump in the closet at the bottom of the service. I have not seen this before and was hoping to get some general background on this. Is it still installed today in some buildings, etc. Thank you, Joe _______________________________________________ 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
