Maintaining Fire Rating of Fume Hood Exhaust Duct Shaft Penetration
Maintaining Fire Rating of Fume Hood Exhaust Duct Shaft Penetration
(OP)
I have a lab project in which FRP duct will be used for fume hood exhaust. The duct penetrates a 2hr shaft. Per NFPA 91 2004 4.1.12 The duct must be wrapped or encased with a listed or approved material equal to the fire rating of the fire barrier on each side for 10 feet. I would like to use a fire wrap type product in lieu of a drywall enclosure. Does anyone know of a UL product for use with FRP? My understanding is that they have only been rated for metal duct.





RE: Maintaining Fire Rating of Fume Hood Exhaust Duct Shaft Penetration
See "FyreWrap 0.5" about a third of the way down the page on this link:
http://ww
Says it's made for plastic piping, why not duct? Probably better to confirm with manufacturer however...
RE: Maintaining Fire Rating of Fume Hood Exhaust Duct Shaft Penetration