Building was originally bid as an ESFR, now the owner is coming back and saying it is going to be used for truck maintenance and wants OHII. We were going to try to use CMDA extended coverage OH and spread the spacing out a little. I am just trying to get up to speed, yesterday morning I was retired.
Richard Mote CET Rowe Sprinkler Systems, Inc. -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of John Denhardt Sent: Tuesday, March 03, 2015 3:12 PM To: '[email protected]' Subject: RE: High Pressure Backflow and Sprinklers I am assuming this is storage - NFPA 13 - Chapter 14 or higher. (Not Chapter 13) If so, 175 psig at the sprinkler is the maximum. No sprinklers listed for storage over 175 psig per NFPA 13. John -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Cahill, Christopher Sent: Tuesday, March 03, 2015 3:09 PM To: [email protected] Subject: Re: High Pressure Backflow and Sprinklers You are at 184 at the floor? As long as the heads are more than 18 ft up you are good with 175 rating. Hard to get hps with sprinklers much under 18 ft high so you might be good. Chris Cahill Fire Protection Engineer Burns & McDonnell [email protected] 952-656-3652 Richard Mote wrote: Does anyone know of a CMDA Extended coverage sprinkler rated above 175 psi? Same question for a backflow preventer? I have looked at all the manufacturers data sheets and I don't see any, but as sure as I state categorically that there isn't any such animal, someone will say but what about XXX mfg. We have a job with a static of 184, residual of 122 and a flow of 1500, want to use CMDA K14.0 or 25.2, and would like the extra pressure. Richard Mote CET Rowe Sprinkler Systems, Inc. _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
