Dewayne: I don't have the references in front of me but can get later today if you need.
In NFPA 13, if you need the requirements for a small room, you can take the area of the room divided by the number of sprinklers in the room to get the area per sprinkler. You then compare that to the listing of your sprinkler and use whichever is greater. For example, a 600 sq ft room with 4 residential sprinklers is 150 sq ft per sprinkler. At 0.10 you have a minimum of 15 gpm. If sprinklers are 8' off walls and no more than 16 ft apart, the listing for a 4.9k pendent is 13 gpm so you use the 15 gpm from above. If your sprinklers at 9' off walls, then you use 17 gpm because that is the listing for 18' spacing of a 4.9k sprinkler. I can find the exact references later today if you are unable to locate. However, if you find where it says to do 4 sprinkler for residential sprinklers, it is the next line or two down that points you to be the room area method for standard spray that i mentioned above. Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone > On Apr 13, 2015, at 5:07 AM, Dewayne Martinez > <[email protected]> wrote: > > It would but I am using residential pendant sprinklers and the small room > rule only applies to standard throw sprinklers. > I guess that's the tradeoff I need to deal with for only wanting to calc 4 > sprinklers and using extended coverage. > > -----Original Message----- > From: Sprinklerforum > [mailto:[email protected]] On Behalf Of John > Denhardt > Sent: Monday, April 13, 2015 6:46 AM > To: <[email protected]> > Subject: Re: NFPA 13 (07ed) apartment obstructions > > Does the small room apply? If so, use .05 x small room rule or listing > whichever is larger. > > Sprinklers Save > >>> On Apr 13, 2015, at 7:38 AM, Dewayne Martinez >> <[email protected]> wrote: >> >> Thanks for confirming Jerry. The light is small and It just looks >> weird to have a head so far away from the center of the room where the >> light is located. Of course when I have to offset the sprinkler so >> much it affects my calculations since it is a 13 application. Glad >> the salesman bid it as if there were no lights present :) Thanks, >> Dewayne >> >> -----Original Message----- >> From: Sprinklerforum >> [mailto:[email protected]] On Behalf Of >> Jerry Van Kolken >> Sent: Thursday, April 09, 2015 6:49 PM >> To: [email protected] >> Subject: RE: NFPA 13 (07ed) apartment obstructions >> >> Looks like your you using the 4x rule . You should only need a single >> head at 36" away. >> >> Jerry Van Kolken >> Millennium Fire Protection >> (760) 722-2722 >> >> >> -----Original Message----- >> From: Sprinklerforum >> [mailto:[email protected]] >> On Behalf Of Dewayne Martinez >> Sent: Thursday, April 09, 2015 10:16 AM >> To: [email protected] >> Subject: NFPA 13 (07ed) apartment obstructions >> >> I am using residential concealed pendant sprinklers in a NFPA 13 >> apartment complex. Many of the rooms have a surface mounted domed >> light which is about 12in in diameter and 5in deep at the center. It >> seems to me that I must maintain at least 36in away from the edge of >> the light per figure >> 8.10.6.2.1.3 or install a sprinkler on both sides correct? >> >> Thanks, >> >> Dewayne >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.o >> rg >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.o >> rg >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkl >> er.org > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.o > rg > _______________________________________________ > 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
