Certain types of sprinklers have specific limitations and they are usually listed as such, typically those designated for storage occupancies. Most Control Mode sprinklers don't list any restrictions and so far I haven't been able to find anything in NFPA stating an NFPA imposed restriction. NFPA defers to the mfgr data for installation issues.
Dealt with this issue ad naseum on a 100ft high structure. I contacted one of the Sprinkler mfgrs and they were very helpful in explaining that in my case even at 100ft the sprinklers will operate. The fire does have to be large enough to bring the ceiling temps up to the release temps of the heads and that could take a little longer than in a 20-30ft high bldg and might trigger more heads. If the AHJ is being persistent, ask the mfgr to write a letter explaining the operation of the heads at the higher elevation will occur and whatever other blah, blah blah words they need. Just something to satisfy the AHJ. 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 Brian Harris Sent: Tuesday, January 29, 2008 9:43 AM To: [email protected] Subject: Max Ceiling Heights Forum, I just got back some comments from the local AHJ on a project we are doing and he's asking me to verify that the heads we are using are rated for ceilings over 30'. I've spoke with the manufacturer and he said he doesn't have anything on min./max. ceiling heights. If memory serves me isn't 50' somewhere in NFPA? Any help would be appreciated. Regards, <http://www.firstdefensefire.com/> _______________________________________________ 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)
