Fire damper in duct through wall yes or no
Fire damper in duct through wall yes or no
(OP)
My design contractor says, he does not need to put a fire damper in a duct that goes through a fire rated walL when the size of the duct is 160mm in diameter or smaller?
What is your opinion?
What is your opinion?





RE: Fire damper in duct through wall yes or no
I also suggest you ask him exactly where he got that info from to double check.
RE: Fire damper in duct through wall yes or no
Check out the applicable state code/IMC in your area to be sure.
RE: Fire damper in duct through wall yes or no
We frequently forget that code requirements are minimum requirements. Try to do better than the minimum.
RE: Fire damper in duct through wall yes or no
RE: Fire damper in duct through wall yes or no
RE: Fire damper in duct through wall yes or no
Several times in my life I have retro-fitted ducts to find that over the years the fire damper has dissolved into a pile of rust that would not stop a fire on a bet.
However due to there being no code to inspect it. the fire damper has lain useless for years.
B.E.
RE: Fire damper in duct through wall yes or no
RE: Fire damper in duct through wall yes or no
There used to be a rule like that over here in The Netherlands but now all ducts going through a fire rated wall require a fire damper.
(In some cases, if the duct was larger than 160mm, the dirty trick of splitting the main duct into smaller ones before passing the wall could be used...)
RE: Fire damper in duct through wall yes or no
The wall is 2 hours fire rated.
The duct is for fresh air supply to the rooms of an office building.
And thanks Zesti,but, designer is from France and the project is in north africa and we work as per American standards.