Hello Craig, the pressures I listed to start the thread is what they designed NOT mine.
Friday, March 16, 2007, 9:57:34 AM, you wrote: > So Charles, did it work without the pump or did it actually need the > pump? > Craig L. Prahl, CET > Fire Protection Group > Mechanical Department > CH2MHILL > Lockwood Greene > 1500 International Drive > PO Box 491, Spartanburg, SC 29304-0491 > Direct - 864.599.4102 > Fax - 864.599.8439 > [EMAIL PROTECTED] > http://www.lg.com > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Charles > Thurston > Sent: Friday, March 16, 2007 11:49 AM > To: [email protected] > Subject: Re[2]: Mininum Supply Pressure > Hello All, > Well this all started when I did not have any excess pressure for a > safety margin and informed the General Contractor a small fire pump > would be required. He decided to take the drawings to another sprinkler > contractor for a second opinion, This other sprinkler contractor stated > it could be done without a pump. At this time the owner of the company I > work for and the general contractor decided to sub out a "redesign" of > the system to this other sprinkler contractor (we still get to do the > install). This other sprinkler company supplied the drawings, calcs, > COC, and Spec sheets. > Friday, March 16, 2007, 9:40:29 AM, you wrote: >> Yet another case of calculate with a computer, measure with a >> micrometer, mark with a piece of chalk and chop off with an axe. >> Ron Fletcher >> Aero Automatic >> Phoenix, AZ >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of Charles >> Thurston >> Sent: Friday, March 16, 2007 7:19 AM >> To: [email protected] >> Subject: Mininum Supply Pressure >> Hello All, >> Let me be the one to start things today. >> What is the minimum safety pressure allowed ? I have looked in 13 and >> did not find it.... I have a situation where the safety pressure is >> 0.913 psi. >> Basis is: >> Hose 250 >> Static 67.00 >> Residual 38.00 @ 920.00 >> Available 40.128 @ demand of 882.87 >> Requires 39.215 psi >> Leaving a safety of 0.913 psi >> >> -- >> Best regards, >> Charles mailto:[EMAIL PROTECTED] >> Coastal Fire Protection >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > -- > Best regards, > Charles mailto:[EMAIL PROTECTED] > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum -- Best regards, Charles mailto:[EMAIL PROTECTED] _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
