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 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Johnson, Duane (NIH/OD/ORS) [C] Sent: Tuesday, April 28, 2009 11:16 AM To: [email protected] Subject: RE: Rating of the sprinkler escutcheon The handbook indicates this exception is for non-combustible pipes. Note also, this exception is for pipes penetrating only one membrane of the assembly. So if the pipe penetrates both sides of the wall, the side opposite of the sprinkler would need penetration protection (firestopping). 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: [email protected] [mailto:[email protected]] Sent: Tuesday, April 28, 2009 11:34 AM To: [email protected] Subject: RE: Rating of the sprinkler escutcheon And is that assuming that the pipe penetrating the membrane is of noncombustible materials? Any time you breach rated construction either the material penetrating has to be non-combustible or you provide a UL Listed , non-combustible sleeve assembly that is sealed at both ends. Craig L. Prahl, CET Fire Protection Specialist 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.ch2m.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Johnson, Duane (NIH/OD/ORS) [C] Sent: Tuesday, April 28, 2009 11:28 AM To: [email protected] Subject: RE: Rating of the sprinkler escutcheon IBC 712.3.2 #3 provides an exception to penetration protection of 1-hr partion: The annular space created by the penetration of a fire sprinkler provided it is covered by a metal escutcheon plate. 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: [email protected] [mailto:[email protected]] Sent: Tuesday, April 28, 2009 11:07 AM To: [email protected] Subject: RE: Rating of the sprinkler escutcheon Not measurable. If the wall is to be 1hr rated construction, the fire stopping material for the penetration must provide equal. How would you measure the value of the sprinkler in relation to hours of equivalent resistance? Craig L. Prahl, CET Fire Protection Specialist 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.ch2m.com -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Greg McGahan Sent: Tuesday, April 28, 2009 11:03 AM To: [email protected] Subject: RE: Rating of the sprinkler escutcheon What about the sprinkler itself? Doesn't it offer something of value at the point of penetration? Greg McGahan Operations Manager Living Water Fire Protection 1160 McKenzie Road P.O. Box 877 Cantonment, Florida 32533 (850) 937.1850 | Fax (850) 937.1852 | Cell (850) 554.3231 [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sal Izzo (TECH- 103) Sent: Tuesday, April 28, 2009 9:59 AM To: [email protected] Subject: RE: Rating of the sprinkler escutcheon I believe CPVC is considered a combustible penetration when running through a rated assembly and therefore would require a listed firestop assembly. Metal escutcheons provide no rating; the IBC permits only an escutcheon to cover the annular space of a sprinkler penetration when the pipe is noncombustible, i.e., steel, copper, conduit, etc. Regards, Salvatore Izzo, P.E. SFPE Manager - Reliable Technical Services ________________________________________ From: [email protected] [[email protected]] On Behalf Of Bobby Gillett [[email protected]] Sent: Tuesday, April 28, 2009 10:56 AM To: [email protected] Subject: Rating of the sprinkler escutcheon Our situations - we have a hotel designed to 13R that requires our cpvc piping to be run through a fire rated wall between two units with 4.0K residential semi-recessed sidewall heads spraying into both units. The other is the extended coverage 8.0K semi-recessed sprinkler spraying into the stairwell (also fed by cpvc from the corridor). The question being asked by the fire marshall - What is the fire rating of the escutcheons? Bobby Gillett Sr. Project Manager Key Fire Protection, Inc. 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