Fire Rating Of Sheet Metal Ductwork

But when it is used one on each side of a properly framed wall it can become a fire rated wall.

Fire rating of sheet metal ductwork.

Actions recommended content. This is a non coated certified fire rated ductwork system made from galvanised sheet metal on our dedicated machinery which delivers performance and reliability expected of a leading brand. When 28 gauge steel deck is used the restrained assembly rating 1 1 2 hr. Like show 1 like 1.

I am not aware of a fire rated wall assembly using sheet metal. Rated floors often use sheet metal pan decking most often with a pour of light weight or standard concrete on top. When 9 16 inch steel deck is used the restrained assembly rating 1 1 2 hr. Galvanized steel ducts fire rating.

Sheet metal penetrations are used in rated assemblies and when correctly fire caulked become part of that assembly. Question asked by sahawnehmajdi on sep 30 2019 latest reply on oct 5. One sheet of 5 8 type x sheetrock has no fire rating. They are usually 10 x 10 sized ducts.

There are some fire tested wall assemblies that are tested with air duct passing through it. The fire tests conducted by swri indicate the 22 gauge metal duct will provide at least a 2 hour fire rating between the fire damper and the barrier.