On a standpipe system, I always indicate the FDC sign requirements on the shop drawing. I usually just state “CHARGE FDC AT 150 PSIG” unless the system needs more.
John August Denhardt, P.E. Vice-President Engineering and Technical Services American Fire Sprinkler Association 301-343-1457 > On Nov 25, 2020, at 11:48 AM, James Crawford via Sprinklerforum > <[email protected]> wrote: > > 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 [email protected]<mailto:[email protected]> > Web: www.phaserfire.ca<http://www.phaserfire.ca> > > _______________________________________________ > 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
