Fire Rating Of Sheet Metal Ductwork

When 28 gauge steel deck is used the restrained assembly rating 1 1 2 hr.

Fire rating of sheet metal ductwork.

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. Rated floors often use sheet metal pan decking most often with a pour of light weight or standard concrete on top. Actions recommended content. Flameshield we are one of only a few uk companies licensed to manufacture flameshield fire rated ductwork compliant to bs 476 part 24.

Sheet metal penetrations are used in rated assemblies and when correctly fire caulked become part of that assembly. They are usually 10 x 10 sized ducts. Like show 1 like 1. Galvanized steel ducts fire rating.

When 9 16 inch steel deck is used the restrained assembly rating 1 1 2 hr. The ducts minimum 22 gauge sheet metal construction are for ventilation purposes only and contain no combustible material within the duct. But when it is used one on each side of a properly framed wall it can become a fire rated wall. One sheet of 5 8 type x sheetrock has no fire rating.

There are some fire tested wall assemblies that are tested with air duct passing through it. I am not aware of a fire rated wall assembly using sheet metal.