So that brings up a follow-up question. One of the scenarios being floated around the office is installing new lines between the existing lines and staggering the heads. That would give lines at 5' apart. but by staggering the sprinklers they would be 7'-9¾" apart and 60 sq. ft. per sprinkler. The question then becomes, if we replace the 1/2"x1/2" 165° with 1/2"x17/32" 286° sprinklers on the existing lines, can we use 3/4"x17/32" 286° sprinklers on the new lines? As long as they are the same K factor I can't think of any reason why not. My goal if we do this is to try and get 0.495 over 2000 and eliminate the in racks. Richard L. Mote Rowe Sprinkler Systems, Inc. 7994 Route 522, Suite 1 PO Box 407 Middleburg, PA 17842 P 570-837-7647 F 570-837-6335
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Friday, February 28, 2014 10:55 AM To: [email protected] Subject: RE: 120 sq. ft. VS. 100 sq. ft. ? Don't forget about 12.6.2 either. Sprinklers for densities greater than 0.20 up to 0.34 shall be minimum K8.0. Ron F -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Richard Mote Sent: Friday, February 28, 2014 8:48 AM To: [email protected] Subject: RE: 120 sq. ft. VS. 100 sq. ft. ? That's it, don't know why I couldn't find it, brain freeze I guess. Richard L. Mote Rowe Sprinkler Systems, Inc. 7994 Route 522, Suite 1 PO Box 407 Middleburg, PA 17842 P 570-837-7647 F 570-837-6335 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Steve Mackinnon Sent: Friday, February 28, 2014 10:42 AM To: [email protected] Subject: RE: 120 sq. ft. VS. 100 sq. ft. ? this one gets them every time! Look at table 8.6.2.2.1 (d) on page 53 of the standard (and page 249 of the handbook) Steven Steven MacKinnon Fire Protection Division Hartcorn Plumbing and Heating, Inc. 850 South Second Street Ronkonkoma, NY 11779 Office 631-580-2300 Fax - 631-580-1090 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Richard Mote Sent: Friday, February 28, 2014 10:38 AM To: [email protected] Subject: 120 sq. ft. VS. 100 sq. ft. ? This is a follow-up to a question I posed a few weeks ago. We are currently working out of NFPA 13, 2007. This is an existing building 25' high with an existing gridded ceiling system with sprinklers spaced at 10' apart on lines spaced at 12' apart, 120 sq. ft.. Existing sprinkler are ½" orifice @ 165°. Existing system is calculated to a .19 density over 1500 sq. ft.. Customer wants to move some existing racks from another building to store wooden patterns un-encapsulated on wood pallets. The way I read chapter 16, Table 16.2.1.3.2 I would use Figure 16.2.1.3.2(d) curve A. 20' max storage height, Class IV commodity, un-encapsulated, 8' aisles, w/ 1 level of in racks. With the water supply available I can make the 0.32 density by changing the overhead sprinkler to 286° ½" x 17/32". However I seem to remember reading somewhere in the book that anything over 0.21 density was limited to 100 sq. ft. spacing. I've spent the last hour looking for it, but it is eluding me. Can anyone tell me where it is or preferably tell me that when you get old you remember things that aren't there.. I know his is a long post bur I wanted to give as full an explanation of the system as possible to avoid questions. Richard L. Mote Rowe Sprinkler Systems, Inc. 7994 Route 522, Suite 1 PO Box 407 Middleburg, PA 17842 P 570-837-7647 F 570-837-6335 _______________________________________________ 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 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
