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.

Flameshield we are one of only a few uk companies licensed to manufacture flameshield fire rated ductwork compliant to bs 476 part 24. One sheet of 5 8 type x sheetrock has no fire rating. Fire ratings are based on an assembly. The ducts minimum 22 gauge sheet metal construction are for ventilation purposes only and contain no combustible material within the duct.

Like show 1 like 1. 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. Actions recommended content. Rated floors often use sheet metal pan decking most often with a pour of light weight or standard concrete on top.

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. When 9 16 inch steel deck is used the restrained assembly rating 1 1 2 hr. Question asked by sahawnehmajdi on sep 30 2019 latest reply on oct 5.

But when it is used one on each side of a properly framed wall it can become a fire rated wall. I am not aware of a fire rated wall assembly using sheet metal.