Couple points: If you are fully sprinklered, why 1250 gpm and not 1200gpm? Are you calculating 65psi or 100 psi at the remote hose connection?
If it is not a high rise, you can call the standpipe manual wet (even though the fire pump supplies the sprinklers) and supply the standpipe by the FDC. See 5.2.5. Duane Johnson, PE Program Manager Division of the Fire Marshal (Support Contractor) Office of Research Services National Institutes of Health 301-496-0487 "Protecting Science - One Sprinkler at a Time" -----Original Message----- From: Greg McGahan [mailto:[email protected]] Sent: Monday, March 07, 2011 12:53 PM To: [email protected] Subject: Re: Manual vs Auto SP wait! Let's keep it very simple here: Can you calculate a SP system that utilizes both a fixed Fire pump that feed sprinklers and SP's and also use the FDC with the accompanying Fire Pumper Truck and adajent fire hydrant as a SOURCE? I think the answer is a resounding NO but I am willing to be wrong if there is a loophole I am unfamiliar with... Thanks, Greg On Mon, Mar 7, 2011 at 11:48 AM, George Church <[email protected]>wrote: > Is the FDC connected to pump suction? > If its not, and the pump is producing 150 PSI discharge, and the FD hits > the FDC with 150 (connected to the discharge side of the fire pump), then > you have 150 PSI, not 300, going to the system. > > You can graph the combination of dissimilar supplies by graphing both and > adding the flows at same pressures. > > Safe to assume the large Fed entity has an FPE as EOR? Cause the FDC isn't > exactly an "automatic" water supply, so the ice is thin, even if its up by > the FroBros. > > George Church > Rowe Sprinkler Systems, Inc. > PO Box 407, Middleburg, PA 17842 > 877-324-ROWE 570-837-6335 fax > [email protected] > > > > -----Original Message----- > From: [email protected] [mailto: > [email protected]] On Behalf Of Greg McGahan > Sent: Monday, March 07, 2011 12:29 PM > To: [email protected] > Subject: Manual vs Auto SP > > What do you do with an existing SP system that far exceed the pressure > requirement when performing calcs...nearly 200 psi over the curve due to the > fact that you are flowing 1,250 gpm through 4" pipe. > > The owner wants to classify the system as MANUAL and utilize a FD to feed > the system but leave the fire pump connected. The system still does not > work when using only the FDC feeding the system due to the fact that the FD > only plans to utilize 2 each 2-1/2" hose to connect to the FDC. > > The owner - a large Federal Entity - wants to make this a HYBRID system > utilizing the Fire Pump and the FDC combined. I can't find a correct way to > do this...thoughts? > > Greg > > -- > Greg McGahan > Living Water Fire Protection, LLC > 1160 McKenzie Road > Cantonment, FL 32533 > 850-937-1850 > fax 850-937-1852 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > -- Greg McGahan Living Water Fire Protection, LLC 1160 McKenzie Road Cantonment, FL 32533 850-937-1850 fax 850-937-1852 _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
