Read the text from the NFPA 13 handbook: "Refuse and residual hydraulic fluids tend to collect at the bottom of shafts. A properly located sprinkler, as required by 8.15.5.1, can control a fire of such material. Conventional requirements regarding the placement of the deflector and clear space below the sprinkler cannot always be adhered to in this area. These issues are not critical, however, because the sprinkler would be physically close to any point where a fire could originate, still allowing the sprinkler to control the fire."
IMHO, it seems you are applying room design methods to an elevator shaft which I don't believe is the intent of the code. One approach is to follow the sprinkler head listings for coverage area and provide enough to cover the entire space. Brett Foreman, PE -----Original Message----- From: Sprinklerforum [mailto:[email protected]] On Behalf Of Steve Sorrell Sent: Wednesday, April 01, 2015 7:32 AM To: [email protected] Subject: Bottom of elevator shaft protection Question, Would the bottom of the elevator shaft be considered light or ordinary hazard ? We have an elevator shaft 15-'4" wide, one head would be acceptable as light hazard but not as ordinary hazard. Stephen J. Sorrell, CET NICET# 77901 Level III E mail: [email protected]<mailto:[email protected]> Performance Fire Protection, LLC Corporate Office 179 Gasoline Alley - PO Box 4510 Mooresville, NC 28117 Phone: 704-663-1664 Fax: 704-663-1652 Cell : 704-309-1242 Web: www.performancefire.com<http://www.performancefire.com> Licensed in NC, SC, VA, TN, GA, AL "Performance on Every Level." _______________________________________________ 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
