steel plate to strengthen joist
#1
06-14-11, 12:36 PM
steel plate to strengthen joist
Here is a joist under my bathtub that needs to be strengthened: 
I'm straightening out the sag with a jack, then I plan to reinforce it on the back with a 2x10, on the front with a steel plate.
The plumber said he can rearrange the drain plumbing so there's only a single hole for a pipe going through the steel plate. So there wouldn't be the huge cutout in the picture.
So what thickness should the steel plate be? It would rest on the sill plate, and go about 15" past the cut part.
thanks
I'm straightening out the sag with a jack, then I plan to reinforce it on the back with a 2x10, on the front with a steel plate.
The plumber said he can rearrange the drain plumbing so there's only a single hole for a pipe going through the steel plate. So there wouldn't be the huge cutout in the picture.
So what thickness should the steel plate be? It would rest on the sill plate, and go about 15" past the cut part.
thanks
#4
06-14-11, 04:36 PM
Group Moderator
Originally Posted by drooplug
You need an engineer to answer this question for you.
#5
06-16-11, 06:46 AM
The joist has been that way for 50 years, it isn't going anywhere. I'm just trying to stiffen it.
I couldn't sister that joist the whole length, there are things getting in the way.
Laura
I couldn't sister that joist the whole length, there are things getting in the way.
Laura
#6
06-16-11, 11:17 AM
If I recall correctly, you talked about having tile on the floor. It is likely that the bounce in the floor will cause your tile to crack. If you are installing larger tub, that could also be a problem with the added weight of the water when it is filled. I wouldn't want to try and support any tub full of water on that joist.
