Is it allowed to install foam-water sprinklers in an exit staircase?
Why do you need foam in a stair??
You can install fire sprinkler pipe in a stair, with some restrictions,,, Is that your question?
I would say no if the building is required by the building code and/or NFPA 101, Life Safety Code to be protected throughout by a supervised automatic sprinkler system. Your question does not meet the intent of this Section of 2018 NFPA 101:
The exit staircase enclosure is sterile from any fuel for that would not be controlled by an automatic sprinkler system in accordance with:
Let me know if this helps.
Thanks for your replies.
Yes, the question is there some restrictions on installing sprinkler in the exit stairs.
The foam is not to protect any fuel in the exit. The exit is empty and made of non combustible material. The exits are for a building in which we are staging and processing flammable liquids. Therefore the entire building is installed with an automatic foam-water sprinkler system (NFPA 30 and NFPA 13). The engineering company, on requirement of the AHJ to have the exit installed with sprinklers too, has simply extended the sprinkler lines to the exit stairs.
My interrogation is about the hazard from foam developing in the stair, partly on evacuation but more for the fire brigade and rescue operations, as they may not be seeing the floor on which they have to walk. I could not find anything in the NFPA standards on that subject. But it may be in one specific to "fire brigades" which I do not have.
So is this project in the US??
Al little strange to protect and entire building with foam, unless the entire building is mainly for the high hazard, say a flammable liquid warehouse,
Well the concern you do not say if it will be open sprinklers or closed sprinklers????
If closed no problem.
If open still no problem, because the rest of the building will be full of foam, so not much difference.
It is closed sprinklers. Yes, problem is low. But, I was looking for any regulatory position on it.
The activity we are in, is about permanently dispensing, pouring, mixing, transfering, packing several thousand of gallons of flammable and combustible liquids, miscible and non miscible with water in one same compartment. We are starting from some several 1000 different liquids, and we do mix them together in any quantities (0.5 gal up to 10000 gal) and any concentrations. All compartments in the same building is similar high hazard process. Would you not agree that this need foam everywhere? We are always looking for better and/or cheaper solutions ;-). Any idea is welcomed.
The reason for the closed or open question is
More than likely there will not be a fire incident in the rated stair enclosure. So with a closed sprinkler, even if you get flow somewhere else in the building, the stair will be clear.
I have not be yet persuaded from my original post.
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