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
