Normally that is what I would do but in this case there is a 1" air gap between the 2x4 walls. 5/8" rock,2x4 stud wall,1" air gap, 2x4 stud wall,5/8" rock with insulation in the stud cavities.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Thom McMahon Sent: Wednesday, March 17, 2010 12:46 PM To: [email protected] Subject: RE: Through wall penetration with sprinkler heads True if the heads are truly Back to Back, we have overcome this with Bld. Official approval by offsetting the heads one joist space so the stud forms the fire blocking. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Johnson, Duane (NIH/OD/ORS) [C] Sent: Wednesday, March 17, 2010 11:42 AM To: '[email protected]' Subject: RE: Through wall penetration with sprinkler heads Membrane penetrations only apply when penetrating only one side of the assembly, see definition in ch. 7. Duane Johnson, PE Program Manager Division of the Fire Marshal (Support Contractor) Office of Research Services National Institutes of Health 301-496-0487 -----Original Message----- From: Thom McMahon [mailto:[email protected]] Sent: Wednesday, March 17, 2010 1:28 PM To: [email protected] Subject: RE: Through wall penetration with sprinkler heads 712.4.1.2 Membrane penetrations. Penetrations of membranes that are part of a fire-resistance-rated horizontal assembly shall comply with Section 712.4.1.1.1 or 712.4.1.1.2. Where floor/ceiling assemblies are required to have a minimum 1-hour fire-resistance rating, recessed fixtures shall be installed such that the required fire resistance will not be reduced. Exceptions: 4. The annular space created by the penetration of a fire sprinkler, provided it is covered by a metal escutcheon plate. Thom McMahon, SET Firetech, Inc. 2560 Copper Ridge Dr P.O. Box 882136 Steamboat Springs, CO 80488 Tel: 970-879-7952 Fax: 970-879-7926 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Dewayne Martinez Sent: Wednesday, March 17, 2010 11:13 AM To: [email protected] Subject: Through wall penetration with sprinkler heads We have a situation that has been talked about in the past but I can't remember what was resolved. Back to back sprinkler heads in a double 2X4 fire rated wall. The exception in the IBC 712.3.2 #3 deals with membrane penetrations and sprinkler escutcheon. What happens when you have a through penetration such as B/B sprinklers? There is no exception in section 712.3.1 of the IBC for sprinkler escutcheons in through penetrations and the manufacture states that you cannot fire caulk a sprinkler escutcheon. Would we need to use the donk style sprinkler esch and fire caulk around the pipe? Thanks, Dewayne Martinez Design Build Fire Protection New Berlin, WI <http://www.designbuildfire.com/> _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
