I really like the "supplemental" thing. If it doesn't have to supply the full system demand why is a check valve required in the riser when there is an FDC? End rant.
We frequently calculate manual wet standpipes using 1500 gpm @ 150 psi at the FDC. We use the NFPA #14 required number of inlets, usually 4. The City of Phoenix allows 500 gpm per inlet so we put 4 ways on ESFR systems too. One of the limiting factors is if FD carries enough equipment on a pumper truck to connect to 4 inlets. Ron Fletcher Aero Automatic Phoenix, AZ -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Roland Huggins Sent: Wednesday, February 01, 2012 9:09 AM To: [email protected] Subject: Re: Standpipe FDC Inlets but the FDC on a sprinkler system is SUPPLEMENTAL and you don't have to meet the system demand. Since one has to also calc the system demand from the FDC, has anyone looked at the maximum flow they can get through a single 2-way FDC and still meet their design demand? Roland On Feb 1, 2012, at 7:52 AM, Steve Leyton wrote: > As do a few on the left side. It's common to see demand-based > requirements for both standpipe and sprinkler systems. How many > ESFR systems are out there with 2-way FDC's? If system demand is > 1,600gpm ... > > SL _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum
