Help with reinforcing wooden beams

SOCKEPLAST · 2011-05-11T05:29:30+00:00

Posting the thread here too, in case I've posted in the wrong forum: During my bathroom renovation, I discovered when tearing up the floor that two of the floor joists were notched and that the drain pipe was routed straight through. The house was built in 1920 and the joist dimensions are 250 x 150. I don't know the span because they disappear under the door, but at least over three meters. The bathroom is on the second floor, and they are the two middle ones of a total of four joists in the room that are hollowed out. The hollowing is about 50 cm from the outer wall. Only about 5-6 cm remains underneath the joists. It's cc60 between the joists. I understand that this needs to be reinforced in some way, as it's going to be leveled and tiled, and a bathtub will be placed on top. But how? The problem is that a 110 pipe has to go through the joists. So, I can't access to insert a new joist alongside the damaged ones unless it's also notched out because the pipe runs almost all the way along the wall. As far as I understand, blocking doesn't help with this type of problem. My idea is some form of metal plates that are nailed/screwed along the sides of the joists, with space for the pipe to pass through. These would then be about a meter long. The problem I see is that they cannot be wider than 50mm where the pipe goes through. Could this hold? And where can one get something like that? If you know how to solve something like this, suggestions are greatly appreciated! :) Some pictures:

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Oldboy

#16

Member · Skåne

· 7 297 posts

12 Jan 2017 at 5:47 PM

Oldboy

Member

Skåne
7,297 posts

12 Jan 2017 at 5:47 PM

Well, a relatively simple and practical solution should be to nail-glue, for example, a 45x95 x 1500-2000 beam along the damage on each joist. It should restore the original strength, while also providing support and something solid to nail/screw into from above if needed.

Help with reinforcing wooden beams

Oldboy

Oldboy

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