Fire damper ductwork floor penetration

Some jurisdictions prescribe a general grid for use in front of listed duct dampers, which are not listed for use without ductwork. Round ducts are stronger, due to their geometry, and will not collapse inward. Additionally, ceiling radiation dampers are not required at penetrations of exhaust ducts, provided the penetrations are appropriately protected, the exhaust ducts are contained within wall cavities, and the ducts do not pass through adjacent dwelling units or tenant spaces. Its all an extremely well-misunderstood deal. In other projects Wikimedia Commons. Originally posted by always-learning View Post. Depending on regional regulation, they are either tested to the same exposure as wall and floor building elements or tested slightly different such as for cable or pipe penetrations.
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HVAC / plumbing penetrations between floors

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Aire Technologies

Duct and air transfer openings that penetrate corridors shall be protected with dampers as follows: The hospital I work for recently completed its sprinkler upgrade and wants to reduce maintenance by removing some fire and smoke dampers in the walls. The Difference is Important. The annulus of an intumescent damper is shut as per its certification listing, such that the intumescent can press against a shut frame to close the opening, thus eliminating annular smoke migration. The purpose of the smoke dampers is to isolate the air-handling equipment from the remainder of the ductwork distribution system. This page was last edited on 2 May , at
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FR Damper - Protecta Fire Protection Products

If you have a copy of that standard, take a look at Figure A in the appendix of the book, and there is a real nifty diagram that points out all of the possible locations where fire and smoke dampers would be required. After 6 years, re-examine the inaccessible fire damper to determine if the environment has changed, and if they are still inaccessible, then close out the PFI, and open a new one for another 6-year cycle. It is possible that a local or state authority made this a requirement at a previous project and he is just being over-zealous in wanting to make sure the job is done right, as he understands it. Perhaps you are thinking about smoke dampers in regards to air handlers. Fabricating the duct from steel sheet stock does not mean it will be easy to firestop. Being fully sprinklered, or not, has no bearing on the requirement whether fire dampers are required.
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Premium Membership Required Access to this requires a premium membership. Ducts and air transfer openings that penetrate fire partitions shall be protected with listed fire dampers installed in accordance with their listing. Fire dampers shall comply with the requirements of UL The Building Code Forum. Retrieved July 26, , from http: Contact We are here for you.
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