If you can shift the sprinkler to be 3'6" off the upper soffit it would work or install a 401 style escutcheon, but I'm assuming you can't do that. Depending on the room situation you can install the head in the soffit and use 8.6.4.1.1.3 (07ed) but you are still going to need another head in the 9'-0" ceiling to use this code. If it is a ceiling pocket you could use 8.6.7 (07ed) as long as the pocket is under 1000cuft but you would need a second head in the opposite wall's soffit.
Jerry Van Kolken Millennium Fire Protection (760) 722-2722 -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Todd - Work Sent: Monday, July 21, 2014 2:04 PM To: [email protected] Subject: stepped obstructions I have a situation where I have a stepped obstruction against a wall. The occupancy is Light Hazard. The primary ceiling is 9'. There is a 4' wide soffit against a wall that is 1' lower. Under that soffit, there is one that is 1'-10" wide that sticks down an additional 1'. I presently have a sprinkler in the high area that is 3'-2" from the edge of the higher soffit. A sprinkler is going to be required under the under the first soffit because the sprinkler in the high area cannot protect underneath it based on section 8.6.5.1.2(1) (NFPA 13 - 2002). However, the sprinkler in the high area can protect under the lower soffit per section 8.6.5.1.2(3). Can I install a sprinkler under the upper soffit and call it a day? Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT www.fpdc.com 860-535-2080 (ofc) _______________________________________________ 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
