Paul: <My standard canned response>
The performance parameters of fire department equipment should be known to the serving agency and you should not have to guess. Contact the AHJ and ask them what standard procedure is when they hit an FDC. Most departments nationwide start at 150 PSI and dial up or down from there based on two-way communication between the point team and the engineer. The proof calc' is to assure that the minimum required residual pressure can be delivered to the remote outlet(s) from the FDC, so once they give you a pressure the usual practice is to measure the friction and elevation losses from the FDC. The flow rate is presumably 500 + 250 +++ as per NFPA 14. Steve Leyton PROTECTION DESIGN & CONSULTING My opinion only - not necessarily a formal or informal interpretation of the standard. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Pinigis Sent: Tuesday, April 10, 2007 8:25 AM To: [email protected] Subject: RE: Manual wet standpipes If there is city water available, include it too. Paul J. Pinigis, P.E. Chief Life Safety Engineer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dewayne Martinez Sent: Tuesday, April 10, 2007 11:23 AM To: SprinklerFORUM Subject: Manual wet standpipes We have a discussion in our office on the correct way to calculate a manual wet standpipe. Our local fire department pumper trucks are set for 150PSI @ 1500 GPM and contain a 1500 gallon tank For calculating a manual wet standpipe back to the fire department connection, should we only use the rated capacity of the pumper truck or are we allowed to add in the city water pressure/flow available at the hydrant at which they hook up to? IE: Either treat it as a stand alone fire pump off a tank or as a standard fire pump w/ city water supply added in. Thanks, Dewayne _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
