Fire Rating Of Sheet Metal Ductwork

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Fire rating of sheet metal ductwork.

Because of the nature of thin sheet metal ductwork and the physics that come into play during the course of a fire. 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. All the data presented from uk and usa relates to fires which entered the hvac system. Sheet metal penetrations are used in rated assemblies and when correctly fire caulked become part of that assembly.

When 9 16 inch steel deck is used the restrained assembly rating 1 1 2 hr. One sheet of 5 8 type x sheetrock has no fire rating. A smoke developed index of 50 or less may be used. Specifications methods to determine fire resistance ratings for generic designs can be found in most building codes e g chapter 7 fire resistance rated construction international building code international code council falls church va 2003.

25 mm thick pipe covering is used. 51 mm thick pipe covering is used with 1 hr and 2 hr fire rated walls. Chapter 8 fire resistive materials and construction nfpa 5000 building construction and safety code nfpa quincy ma 2006. Question asked by sahawnehmajdi on sep 30 2019 latest reply on oct 5.

Flameshield we are one of only a few uk companies licensed to manufacture flameshield fire rated ductwork compliant to bs 476 part 24. 2 hour e119 s101 fire rated duct and enclosure. Lightweight 2 hour fire rated duct. They are usually 10 x 10 sized ducts.

But when it is used one on each side of a properly framed wall it can become a fire rated wall. Ductwork support ductwork support and recommended. There are some fire tested wall assemblies that are tested with air duct passing through it. Rated floors often use sheet metal pan decking most often with a pour of light weight or standard concrete on top.

3 hour fire. Ductwork seal classes ductwork prone to air leakages. The firestop system is 1 hr and 1 1 2 hr when nom 2 in. Galvanized steel ducts fire rating.

The largest 2 hour fire and blast resistant duct. When 28 gauge steel deck is used the restrained assembly rating 1 1 2 hr. The hourly t rating of. 2 hour zero clearance kitchen exhaust duct.

Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Fire ratings are based on an assembly. Further any proposals to incorporate this into bs 9999 should be avoided. Conditioning ductwork in relation to fire safety and fire protection.

I am not aware of a fire rated wall assembly using sheet metal. The hourly t rating of the firestop system is 3 4 hr when nom 1 in.