Thanks, all. As I thought, but nice to have confirmation. ----- Original Message -----
From: "Richard Carr" <[email protected]> To: "sprinklerforum" <[email protected]> Sent: Monday, March 16, 2015 3:00:37 PM Subject: RE: QR reduction in attic? Agreed, I would look at using attic heads also. Richard Carr, SET Branch Manager Cox Fire Protection, Inc 6555 Grace Lane. Jacksonville, Fl. 32205 [email protected] 904-781-8227 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Parsley Consulting Sent: Monday, March 16, 2015 2:55 PM To: [email protected] Subject: Re: QR reduction in attic? Ed, adding on to what Travis and Steve have noted, yes, provided you account for the increased remote area per 11.2.3.2.4, as well as taking a reduction for quick response per 11.2.3.2.1. based on the idea that you're protecting a combustible concealed space with a pitch of 4:12 or greater, take a close look at the information in 8.6.4.1.4 if you haven't already. It's also worth the time to make sure you've taken into account the limitations on the bottom row of Table 8.6.2.2.1(a) for coverage area and maximum spacing, as Travis noted. Depending on the spacing you end up with 8.6.4.1.4.4 may force you into a 20 psi starting pressure. *Ken Wagoner, SET *Parsley Consulting*** *350 West 9th Avenue, Suite 206 *Escondido, California 92025 *****Phone 760-745-6181* Visit our website <http://www.parsleyconsulting.com/> *** On 3/16/2015 11:27 AM, Travis Mack wrote: > Yes..QR reduction permitted. We take the height based on the distance > from the lowest ceiling to the peak. Remember to take the 30% > increase for sloped ceilings. > > One thing to consider. You are going to be limited to 120 sq ft per > sprinkler. Consider using 4.2k SSU (light hazard wet pipe) as it will > greatly minimize the over-discharge and therefore friction losses in > your system. > > Travis Mack, SET > MFP Design, LLC > 2508 E Lodgepole Drive > Gilbert, AZ 85298 > 480-505-9271 > fax: 866-430-6107 > email:[email protected] > > http://www.mfpdesign.com > https://www.facebook.com/pages/MFP-Design-LLC/92218417692 > Send large files to us via: https://www.hightail.com/u/MFPDesign > > On 3/16/2015 11:26 AM, [email protected] wrote: >> Here's one for Y'all. >> With a wet-pipe system in an attic, (4/12 pitch) can the area >> reduction for quick response sprinklers be used? >> If so, how is the ceiling height determined? From the ceiling below >> to the highest point of the roof? >> Thanks >> Bill >> >> >> >> _______________________________________________ >> Sprinklerforum mailing list >> [email protected] >> http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprink >> ler.org >> > > _______________________________________________ > 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.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
