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Type I Hood - Clearance to combustibles
December 20, 2018
3:51 pm
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paul@cityofcharlescity.org
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April 29, 2015
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I rejected a hood install as the wood roof joists above it were only 15" from the hood.  They were bare joists. 

Paul Hughes

December 12, 2018
12:19 pm
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michael.buenger@yahoo.com
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Yes unless the assembly is 18 inches thick

May 8, 2018
8:29 pm
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bklakamp@sbcglobal.net
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April 21, 2015
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How do building inspectors in your area interpret the Mechanical Code requirement for 18” clearance to combustibles for Type I Hoods? (IMC 507.2.6)

Here is my specific situation: The Type I hood will be mounted up against a noncombustible wall, with the following assembly: Stainless steel / cement board / steel studs / plywood sheathing.

Does the plywood on the other side of the wall need to be fire retardant treated?

Bryan, a BI in NW Ohio