Fire Rating Of Sheet Metal Ductwork

The largest 2 hour fire and blast resistant duct.

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. I am not aware of a fire rated wall assembly using sheet metal. 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.

Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. Like show 1 like 1. Further any proposals to incorporate this into bs 9999 should be avoided. 3 hour fire.

Duct velocity calculate velocities in circular and rectangular ducts imperial and si units online calculator. When 28 gauge steel deck is used the restrained assembly rating 1 1 2 hr. When 9 16 inch steel deck is used the restrained assembly rating 1 1 2 hr. The hourly t rating of.

Question asked by sahawnehmajdi on sep 30 2019 latest reply on oct 5. Data from both the london fire brigade and the usa give some indication of fires that go beyond room of origin. Sheet metal penetrations are used in rated assemblies and when correctly fire caulked become part of that assembly. 2 hour zero clearance kitchen exhaust duct.

25 mm thick pipe covering is used. Ductwork support ductwork support and recommended. Fire ratings are based on an assembly. Because of the nature of thin sheet metal ductwork and the physics that come into play during the course of a fire.

The hourly t rating of the firestop system is 3 4 hr when nom 1 in. Galvanized steel ducts fire rating. They are usually 10 x 10 sized ducts. A smoke developed index of 50 or less may be used.

But when it is used one on each side of a properly framed wall it can become a fire rated wall. The firestop system is 1 hr and 1 1 2 hr when nom 2 in. 51 mm thick pipe covering is used with 1 hr and 2 hr fire rated walls. All the data presented from uk and usa relates to fires which entered the hvac system.

There are some fire tested wall assemblies that are tested with air duct passing through it. Lightweight 2 hour fire rated duct. Rated floors often use sheet metal pan decking most often with a pour of light weight or standard concrete on top. Ductwork seal classes ductwork prone to air leakages.

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. Conditioning ductwork in relation to fire safety and fire protection.