Are smoke dampers required in smoke barriers?

Are smoke dampers required in smoke barriers?

Smoke dampers are required at penetrations of smoke barriers, unless the HVAC system is fully ducted and there is a sprinkler system installed throughout the facility, in which case they are not required. Smoke dampers are also required in air transfer openings (non-ducted) in smoke partitions.

Where are fire smoke dampers required?

Smoke dampers are required in air-transfer openings (an opening designed to allow the movement of environmental air between two contiguous spaces) in smoke partitions and in air transfer openings and duct penetrations in smoke barriers.

Are smoke dampers required in a 1 hour wall?

1. Fire dampers are not required in ducted HVAC systems provided the wall is 1-hour fire resistance rated or less, occupancy is not Group H, and the building is equipped throughout with an automatic sprinkler system.

Are fire dampers required in exterior walls?

6) Exterior Walls. Ducts and air transfer openings in fire-resistance rated exterior walls required to have protected openings in accordance with Section 704.14 shall be protected with listed fire dampers in accordance with their listing.

Are fire dampers mandatory?

Ductwork passing through compartment and sub-compartment walls should be provided with fire dampers. When ducts serve a hazard room, then fire dampers are required.

Why are fire dampers required?

The fire damper secures the integrity of the existing barrier thus preventing fire penetration before temperatures reach the fire rating level of the barrier itself. Its primary function is to prevent the passage of fire from one side to the other of a fire-rated separation.

What is the difference between smoke dampers and fire dampers?

A fire damper closes once the duct temperature reaches a high enough level to melt a fusible link. A smoke damper closes upon the detection of smoke. It is UL leakage-rated to stop smoke in its tracks, which is a main difference from fire dampers.

Does a 2 hour fire rated wall require a fire damper?

If the air duct is an air transfer opening (meaning it is not fully ducted) at the fire-rated barrier, then the duct needs a fire damper where other openings are required to be protected as well. However, two-hour fire-rated barriers do require fire dampers in fully ducted HVAC systems.

Are fire dampers a legal requirement?

Under the Regulatory Reform (Fire Safety) Order it is a legal requirement to test fire dampers at regular intervals in accordance with fire safety in the design, management and use of buildings code of practice (BS:9999 2017), using a method known as ‘drop testing’.

Are fire dampers required in 30 minute walls?

Ductwork passing through compartment and sub-compartment walls should be provided with fire dampers. Where a duct passes through a fire hazard room, but does not serve it, fire dampers are not required but the duct must have fire resistance of 30 minutes in respect to integrity and insulation.

Where are smoke partitions required?

Smoke partitions shall extend from the top of the foundation or floor below to the underside of the floor or roof sheathing, deck, or slab above or to the underside of the ceiling above where the ceiling membrane is constructed to limit the transfer of smoke.

Do you need a fire damper in a 30 minute wall?

Can a smoke barrier be used as a fire barrier?

Where a smoke barrier is also constructed as a fire barrier, a combination fire/smoke damper must be used.

When to use a fire and smoke damper?

Smoke dampers are provided with leakage and temperature ratings. A combination fire/smoke damper is used when a barrier is both rated for fire resistance as well as designed to restrict the transfer of smoke and will meet both the fire damper and smoke damper requirements. What standards area applicable?

Are there fire dampers required at 1-hr shaft walls?

A fire damper would not be required. The dwg. at the back of 90A shows plain metal duct going thru a 1hr. rated wall without a damper. Shafts, floors & walls if 1hr. are the same. RE: Are fire dampers required at 1-hr shaft walls?

What’s the minimum rating for a fire barrier?

The minimum fire protection ratings of the protective openings on fire barriers are required to be 75% of the fire barrier resistant rating. So, a 2-hour fire barrier must have a minimum of a 1 ½ hour fire protection rating for its openings and a 1-hour fire barrier must have a minimum of a ¾ hour fire protection rating for its openings.