Yes, the insurance underwriters can add their requirements, but the AHJ cannot. The AHJ is tasked with enforcing the adopted codes, not inventing new ones or adding his/her personal preferences. The code does not demand a pressure cushion, neither can the AHJ.
Paul J. Pinigis, P.E. Chief Life Safety Engineer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, March 16, 2007 9:41 AM To: [email protected] Subject: RE: Minimum Supply Pressure Also, some insurance underwriters and AHJ's have requirements relating to particular required safety factors in the calcs. Don't forget to check with them as well. 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 Paul Pinigis Sent: Friday, March 16, 2007 9:31 AM To: [email protected] Subject: RE: Minimum Supply Pressure If you can achieve 10% without spending your client's money (or your own) great, but it is not necessary. Paul J. Pinigis, P.E. Chief Life Safety Engineer -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Harris Sent: Friday, March 16, 2007 9:29 AM To: [email protected] Subject: RE: Minimum Supply Pressure 10% is what we go by, based on your numbers your only at around 2% :( Regards, Brian Harris First Defense Fire Protection Design Engineer [EMAIL PROTECTED] 704.948.3506 phone 704.948.3507 fax -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Charles Thurston Sent: Friday, March 16, 2007 10:19 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
