"NFPA 13, 2007 7.8.8.3 For wall protection systems, sprinklers shall be located 6 in. to 12 in. (152mm to 305 mm) from the wall surface and within 6 in. (152 mm) of the top of the wall, with maximum spacing of 8 ft (2.44 m) or as indicated in the sprinkler listing for exposure protection use.
7.8.8.4 For protection of window and similar openings, listed window sprinklers shall be positioned within 2 in. (50.8 mm) of the top of the window sash in accordance with Table 7.8.8.4." This kind of one of the good, better, best questions. While the pdt will work, that is not what it is listed for. It is an area protection sprinkler. The window sprinklers are designed, tested and approved for a particular spray pattern which is suitable for exposure protection. But in 21.20.1.2.1 as you stated you can achieve compliance with standard sprinklers as long as you have met the listed criteria. It may be more practical and cost effective to place the first row of ceiling sprinklers close enough to the glass to protect area and surface. Read NFPA 13, 2007, 22.7 Exposure Protection.... and you'll get more info on this. PDT's are permitted but there are some calculation and coverage issues that need to be dealt with. 22.7.3 specifically. Craig L. Prahl, CET Fire Protection Group Mechanical Department CH2MHILL Lockwood Greene 1500 International Drive PO Box 491, Spartanburg, SC 29304-0491 Direct - 864.599.4102 Fax - 864.599.8439 [EMAIL PROTECTED] http://www.lg.com -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Karen Purvis Sent: Wednesday, October 31, 2007 1:00 PM To: [email protected] Subject: Need Help fast I need to know if there is a code anywhere that states you can or can not use a standard pendant head as a window wash. I have a glass wall that I need to be fire rated and I have a contractor telling me by code he can use a pendant head instead of a deluge head or a Tyco window sprinkler. The only code I see that possibly address this is 21.20.1.2.1 and it only says you have to use automatic heads. Any help!!!!! Karen Purvis Designer Facility Systems Consultants 714 S Gay St Knoxville, TN 37902 ph.865-246-0164 fax 865-246-1084 _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
