Unfortunately, the layout of the new bathroom requires me to cross a joist for plumbing. Unfortunately, it's also a 110 drain pipe for the toilet that needs to go through. The joist is 240 mm and the pipe needs to go through just above the middle! The hole will be about 1.5 meters from one attachment point and 3 meters from where it rests on a load-bearing wall! I've read a lot of other threads, but no construction is exactly alike!
I'm not thrilled about crossing the joist but I have no choice.
I have reinforced with blocking to both adjacent joists (cc 60) on both sides of the passage and will now reinforce on both sides of the hole!
The question is, what should I reinforce with? I have leftover OSB at home. Is it thick enough? I also have particle board at home! I've read about 22mm ply, but where can I find it that thick (Byggmax only has 12mm)? What kind of glue should I use before screwing?
Should I use metal instead?
I'm not thrilled about crossing the joist but I have no choice.
I have reinforced with blocking to both adjacent joists (cc 60) on both sides of the passage and will now reinforce on both sides of the hole!
The question is, what should I reinforce with? I have leftover OSB at home. Is it thick enough? I also have particle board at home! I've read about 22mm ply, but where can I find it that thick (Byggmax only has 12mm)? What kind of glue should I use before screwing?
Should I use metal instead?
If it's just a beam, I would have done a bridging instead. Cut off the beam, attach cross beams in beam shoes to the nearby beams, then hang the cut beam in beam shoes to the cross beams. If you then screw-glue chipboard and floor gypsum, it will hold up excellently.
Well, I was probably a bit unclear! I have difficulty with the concepts of what is a joist, crossbeam, etc... Crossbeam in this case because it runs between the longitudinal outer walls.
It's about the second floor, and it's the underside of a truss (the trusses have cc 120). Since the construction with the truss is load-bearing in itself, it's probably not ideal to make holes in the construction...
It's about the second floor, and it's the underside of a truss (the trusses have cc 120). Since the construction with the truss is load-bearing in itself, it's probably not ideal to make holes in the construction...
By just above the middle, I mean that the center of the hole to be made is located just above the middle. That is, the center will be 130-140 mm when viewed from below. I can experiment a bit, but then I risk potentially poor drainage.
The floor will be floor chipboard and then floor gypsum on top!
The floor will be floor chipboard and then floor gypsum on top!
Hello,
I used 15mm plywood from K-rauta (quite expensive compared to ByggMax 12mm) but now I think I could park a tank there without any problem...
There are different types of plywood, they had never heard of K-plywood at K-rauta...
But I chose the strongest one (and not lacquered because I used puretan—or whatever it's called—wood glue)
The glue was a bit intense, I test glued a piece that I screwed onto a floor beam. The glue foams (and expands?) after a while, now that it has dried, it's solid as a rock.
/R
I used 15mm plywood from K-rauta (quite expensive compared to ByggMax 12mm) but now I think I could park a tank there without any problem...
There are different types of plywood, they had never heard of K-plywood at K-rauta...
But I chose the strongest one (and not lacquered because I used puretan—or whatever it's called—wood glue)
The glue was a bit intense, I test glued a piece that I screwed onto a floor beam. The glue foams (and expands?) after a while, now that it has dried, it's solid as a rock.
/R
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