I live in a multi-story building and have started tearing down the drywall to remodel a bit, but noticed that the pipe riser is framed with metal studs and drywall on the inside of the metal studs. The pipe risers contain water, drainage, ventilation.
I want to replace 2 of them with wood when I remodel. Is this something that is allowed, or would it be against any regulations?
Hello! Is it a single-family house with multiple floors, or is it a multi-family building with many apartments? Do you know what the ventilation ducts serve?
There are no general requirements for a specific material in wall constructions, but fire protection requirements for the wall's separation ability and/or surface layer class guide it somewhat, depending largely on the answers to the questions above.
It is a housing cooperative with several apartments. There is ventilation for the bathroom as all apartments look the same all the way as far as I have understood it.
Ok. Then I would recommend consulting a fire safety consultant who can take a closer look at it to get it right. Likely, the shaft should be a separate fire compartment EI 60, and there should be no exposed combustible material (including sewage pipes) in the same shaft as ventilation.
Since fire safety consultant is not a protected title with certification requirements or equivalent, you should hire someone who is a member of the fire safety consultant association to ensure quality. https://www.brandkonsultforeningen.se/medlemmar/
Ok. Then I would recommend consulting a fire safety consultant who can come and take a closer look to get it right. Probably the shaft should be its own fire cell EI 60, and there shouldn't be exposed flammable material (including drain pipes) in the same shaft as ventilation.
Since the title of fire safety consultant isn't protected with certification requirements or equivalent, you should hire someone who is a member of the fire consultancy association to ensure quality.
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Okay, it feels a bit over the top though for me to do that since probably all the shafts in about 400 apartments will look similar and therefore aren't isolated as fire cells. Is there perhaps a difference since it's not a "shaft" per se as they have cast the pipes in the concrete slab? I live on the top floor, so that's why it looks different in the ceilings.
There is quite a lot of "ifs and buts" regarding fire protection around ventilation installations, but if it is cast around the ducts and pipes down in the shaft, it is quite good. How much protection is needed partly depends on the type of protection system used to prevent fire and smoke spread in the ventilation. However, the penetration up to the attic does not look entirely correct and should be reviewed now that the shaft is open anyway.
It is a shaft that must withstand Ei60. It is meant to protect the apartment from catching fire for 60 minutes if a fire starts on the floors below. The fire would then enter the pipes and the shaft should prevent it from spreading to the apartment in question. It is permitted to have sewage pipes in the same shaft if they are made of non-combustible material. Yours appear to be made of cast iron, which is fine.
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