Technically by the wording in NFPA 13, No. But from a realistic standpoint, maybe. If it's just a walkway with no chance of storage below it and the discharge from the overhead sprinklers can reach the area below the walkway without any interference, then probably not. But sometimes you have to look at the space and make a judgment call beyond what it written in black and white.
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 Eric Shelton Sent: Thursday, April 05, 2007 1:30 PM To: [email protected] Subject: RE: open grate flooring If a floor is less than 48" wide but is adjacent to a wall, does it need sprinklers under it? /Eric Shelton Hankins and Anderson, Inc. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Thursday, April 05, 2007 1:27 PM To: [email protected] Subject: RE: open grate flooring Just because the floor is open grating doesn't discount the need of sprinklers below it. Grating can still create an obstruction to sprinkler discharge. 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 Rod DiBona Sent: Thursday, April 05, 2007 1:07 PM To: [email protected] Subject: open grate flooring I am working on a large jail project where the architect has asked me to provide value engineering ideas. One of the things that I am considering bringing to his attention is the possibility of turning their upper cell walkway into an open grate flooring of 4' or less. I was pretty sure that this would eliminate the need for sprinklers under these walkways but I wanted to substantiate it before I presented it. NFPA 13 02 edition 8.5.5.3.1 states " Sprinklers shall be installed under fixed obstructions over 4ft wide such as ducts, decks, open grate flooring, cutting tables, and overhead doors". Am I correct in assuming that if these "floors" are 4' or less that sprinks will not be required? I thought that I remembered that there were other requirements such as percentage or size of openings similiar to the meshing in nursing home curtains but I can't find it anywhere. Any help is appreciated. Thanks, Rod DiBona Rapid Fire Protection _______________________________________________ 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) _______________________________________________ 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)
