I was hoping we weren't going to encourage folks to start caulking around concealed plates.....
glc -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Johnson, Duane (NIH/OD/ORS) [C] Sent: Tuesday, April 28, 2009 3:13 PM To: [email protected] Subject: RE: Rating of the sprinkler escutcheon After further review of the IBC Handbook and structure of the exceptions in the main body of the IBC, I see no reason why firestopping is required when a metal escutcheon is installed regardless of concealed steel or CPVC piping. Having re-read the handbook for section 712.3.2.3, the handbook indicates this exception is for non-combustible "plates" not pipes as indicated below. The escutcheon conceals the pipe (limited combustible or non-combustible) and prevents a limited passage of fire. The metal plate and presence of a sprinkler make the issue of non-combustible vs. limited combustible material disappear. There are other specific exceptions to firestopping for metallic pipes (such as section 712.3.1). Install a metallic escutcheon and call it a day for recessed and concealed sprinklers. For exposed situations, an appropriately approved through penetration firestop system is required. Duane Johnson, PE Program Manager Division of the Fire Marshal (Support Contractor) Office of Research Services National Institutes of Health 301-496-0487 _______________________________________________ Sprinklerforum mailing list http://lists.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)
