'Let's Get Ready To Rumble'... Happy St. Patrick's Day!!! Just don't get pinched on a designing a system without a good enough safety margin!
Kathryn -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Fletcher, Ron Sent: Friday, March 16, 2007 8:19 AM To: [email protected] Subject: RE: Re[2]: Mininum Supply Pressure Yeah, now we're getting to the good stuff. Ideally a safety margin is a good thing. Asking an owner to spend $50k to add a pump IMHO shows a real lack of imagination. If it complies with code who are we to say "I know better"? It takes a PE to know that NFPA, IBC, IFC and the local AHJ are all wrong. Surely no layout technician would say they know better than the codes. In honor of St. Patrick's I though I would try to start a fight. Ron Fletcher Aero Automatic Sprinkler Phoenix, AZ -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian Harris Sent: Friday, March 16, 2007 8:00 AM To: [email protected] Subject: RE: Re[2]: Mininum Supply Pressure That may be a blessing in disguise, let them put their neck on the line. If I ain't got 10% it ain't going in, period. 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 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum
