Fire Rating Of Sheet Metal Ductwork

The firestop system is 1 hr and 1 1 2 hr when nom 2 in.

Fire rating of sheet metal ductwork.

One sheet of 5 8 type x sheetrock has no fire rating. A smoke developed index of 50 or less may be used. Ventilation systems for ventilation and air handling air change rates ducts and pressure drops charts and diagrams and more. 2 hour e119 s101 fire rated duct and enclosure.

But when it is used one on each side of a properly framed wall it can become a fire rated wall. 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. Fire ratings are based on an assembly.

The largest 2 hour fire and blast resistant duct. Ductwork seal classes ductwork prone to air leakages. 51 mm thick pipe covering is used with 1 hr and 2 hr fire rated walls. Ductwork support ductwork support and recommended.

Because of the nature of thin sheet metal ductwork and the physics that come into play during the course of a fire. When 28 gauge steel deck is used the restrained assembly rating 1 1 2 hr. 25 mm thick pipe covering is used. 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. All the data presented from uk and usa relates to fires which entered the hvac system. Like show 1 like 1. 3 hour 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. 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. Lightweight 2 hour fire rated duct. Galvanized steel ducts fire rating.

Further any proposals to incorporate this into bs 9999 should be avoided. When 9 16 inch steel deck is used the restrained assembly rating 1 1 2 hr. 2 hour zero clearance kitchen exhaust duct. Flameshield we are one of only a few uk companies licensed to manufacture flameshield fire rated ductwork compliant to bs 476 part 24.

The hourly t rating of the firestop system is 3 4 hr when nom 1 in. Sheet metal penetrations are used in rated assemblies and when correctly fire caulked become part of that assembly. The hourly t rating of. Conditioning ductwork in relation to fire safety and fire protection.

I am not aware of a fire rated wall assembly using sheet metal. They are usually 10 x 10 sized ducts.