Hi,
I'm renovating the hallway where we have a large staircase down to the basement. Of course, we need to reach up to the ceiling as we are going to put up drywall and wallpaper.
The gap is about 3.2 x 1 m, see here: http://i.imgur.com/prD0FsQ.jpg
. For this, I've cut 3 pieces of 45x70 studs, each 4 m long, which I plan to place across. On top of this, I was thinking of placing a 2.4x0.75 m plywood.
What do you think about this? Will it hold, or do I need to reinforce against the steps?
I've hung a bit on 2 studs, and they do flex.
I'm renovating the hallway where we have a large staircase down to the basement. Of course, we need to reach up to the ceiling as we are going to put up drywall and wallpaper.
The gap is about 3.2 x 1 m, see here: http://i.imgur.com/prD0FsQ.jpg
. For this, I've cut 3 pieces of 45x70 studs, each 4 m long, which I plan to place across. On top of this, I was thinking of placing a 2.4x0.75 m plywood.
What do you think about this? Will it hold, or do I need to reinforce against the steps?
I've hung a bit on 2 studs, and they do flex.
If we imagine a point load of 100 kg landing in the middle of the central joist without considering that the load is also distributed somewhat on the others, the deflection will be about 7.5 cm if the timber class is C14. This is not something you want to experience if you simultaneously plan to perform some work. You need to go up to size 45x120 class C24 for it to feel acceptable.
It will definitely hold with 3 pieces of 45x70 and a plywood. I myself stood on 17mm raw pine with about 2.5m between support points this week. It flexed, but it held.
Today the bridge was inaugurated, 3 x 70 mm on edge and a plywood, here is a picture: http://i.imgur.com/9nC0xYu.jpg
I didn't actually see justusandersson's post until now, if I had, I probably wouldn't have dared to go with 3 x 70 either.
However, it went well, it didn't flex much actually, and there were no issues standing on a ladder on it either. Sure, it could have felt safer, 45x120 sounds like a better choice, and I would probably have used that if I were to redo the platform, but that's partly because I'm a bit afraid of heights too
I will be using this bridge for plastering and wallpapering, but now I know it holds for me. However, I probably wouldn't dare to have 2 people on it, which was the initial idea.
I didn't actually see justusandersson's post until now, if I had, I probably wouldn't have dared to go with 3 x 70 either.
However, it went well, it didn't flex much actually, and there were no issues standing on a ladder on it either. Sure, it could have felt safer, 45x120 sounds like a better choice, and I would probably have used that if I were to redo the platform, but that's partly because I'm a bit afraid of heights too
I will be using this bridge for plastering and wallpapering, but now I know it holds for me. However, I probably wouldn't dare to have 2 people on it, which was the initial idea.