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.

Further any proposals to incorporate this into bs 9999 should be avoided. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. I am not aware of a fire rated wall assembly using sheet metal. 3 hour fire.

Firestopping non dampered heating ventilation and air conditioning hvac duct penetrations in fire rated walls is more involved than installing that ubiquitous red caulk into the space between the duct and the periphery of the opening. Like show 1 like 1. 25 mm thick pipe covering is 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.

Chapter 8 fire resistive materials and construction nfpa 5000 building construction and safety code nfpa quincy ma 2006. There are some fire tested wall assemblies that are tested with air duct passing through it. The hourly t rating of. When 9 16 inch steel deck is used the restrained assembly rating 1 1 2 hr.

The largest 2 hour fire and blast resistant duct. 2 hour zero clearance kitchen exhaust duct. 51 mm thick pipe covering is used with 1 hr and 2 hr fire rated walls. Sheet metal penetrations are used in rated assemblies and when correctly fire caulked become part of that assembly.

The firestop system is 1 hr and 1 1 2 hr when nom 2 in. The hourly t rating of the firestop system is 3 4 hr when nom 1 in. 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. Ductwork seal classes ductwork prone to air leakages.

Ductwork support ductwork support and recommended. But when it is used one on each side of a properly framed wall it can become a fire rated wall. They are usually 10 x 10 sized ducts. Conditioning ductwork in relation to fire safety and fire protection.

Fire ratings are based on an assembly. Rated floors often use sheet metal pan decking most often with a pour of light weight or standard concrete on top. Lightweight 2 hour fire rated duct. Galvanized steel ducts fire rating.

Flameshield we are one of only a few uk companies licensed to manufacture flameshield fire rated ductwork compliant to bs 476 part 24. Data from both the london fire brigade and the usa give some indication of fires that go beyond room of origin. All the data presented from uk and usa relates to fires which entered the hvac system. 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. A smoke developed index of 50 or less may be used.