Hi Scott, I believe you're right, I do remember reading that somewhere in the past and the key words are "ancillary spaces" . But I also believe that in the real world it would be a stretch to justify the leap to ordinary hazard for an office occupancy mechanical room from a fuel loading perspective.
Mark at Aero 602 820-7894 Sent from my iPad On May 5, 2015, at 5:08 PM, "JSM Fire Pro" <[email protected]<mailto:[email protected]>> wrote: Maybe Mr. Phelps is thinking of the building and/or life safety code criteria that allow ancillary spaces to take the occupancy classification of the predominant use. J. Scott Mitchell, PE -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Tuesday, May 05, 2015 6:22 PM To: [email protected]<mailto:[email protected]>; [email protected]<mailto:[email protected]> Subject: RE: Light & OH1 Hazard From Same Riser LOL! One of us is making stuff up ... and I think it's you, of course. I'm on the road and don't have my books with me but I'm pretty sure that utility and/or mechanical rooms, service areas, etc. are classified in Chap 5 (annex) as OH1. In practice, those rooms get filled with crap and we have an unspoken and uncodified responsibility to not turn a blind eye methinks. I have heard over and over from fire officials that their concerns regarding such spaces, electrical rooms, etc. is due to years of inspections where misc. storage is found. No reason not to practically apply something we already know ... SL -----Original Message----- From: Sprinklerforum on behalf of [email protected]<mailto:[email protected]> Sent: Tue 5/5/2015 4:09 PM To: [email protected]<mailto:[email protected]> Subject: RE: Light & OH1 Hazard From Same Riser Well that sounds good, but did you just make that up? Or is it written somewhere? I seem to remember reading somewhere that a mechanical room could be classified the same as the occupancy it served. Light for light, ordinary for ordinary, etc. or maybe I just made that up? Mark at Aero 602 820-7894 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Leyton Sent: Tuesday, May 05, 2015 3:14 PM To: [email protected]<mailto:[email protected]>; [email protected]<mailto:[email protected]> Subject: RE: Light & OH1 Hazard From Same Riser It's capacity for, and the historical practical application of such spaces as storage rooms. SL -----Original Message----- From: Sprinklerforum on behalf of [email protected]<mailto:[email protected]> Sent: Tue 5/5/2015 3:12 PM To: [email protected]<mailto:[email protected]> Subject: RE: Light & OH1 Hazard From Same Riser Just out of curiosity, what makes the mechanical room of an office building be ordinary hazard? Mark at Aero -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Jack Carlson Sent: Tuesday, May 05, 2015 2:51 PM To: [email protected]<mailto:[email protected]> Subject: RE: Light & OH1 Hazard From Same Riser John, You should not have an issue with the design as described. Light and ordinary are commonly mixed, no separate supply main is necessary. Jack W. Carlson, SET Triple "A" Fire Protection Office - 251.649.2034 Fax - 251.649.2037 Cell - 706.247.5050 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of John Allen, CET, CFPS Sent: Tuesday, May 05, 2015 5:38 PM To: [email protected]<mailto:[email protected]> Subject: Light & OH1 Hazard From Same Riser I apologize for such a simple question, but I would greatly appreciate some guidance: I have a 22,000 sqf light hazard office space with a 750 sqf mechanical room that I've identified as ordinary hazard 1. The entire ceiling space is an open 14' concrete beams and roof deck, and the mechanical room is separated by sheetrock and self-closing doors. The riser is in the mechanical room and I have 7 upright sprinkler heads fed off the cross main pipe feeding the light hazard office space. What code allows me to design this way or must I create a separate riser feed for each hazard? Best Regards, John Allen, CET, CFPS President AFS: Allen Fire & Security Your Safety is Our Success Direct: 770.715.7261 | Office: 770.723.7280 Ext 2 | Fax: 678.894.4180 _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[email protected]> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org --- This email has been checked for viruses by Avast antivirus software. http://www.avast.com _______________________________________________ Sprinklerforum mailing list [email protected]<mailto:[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
