I am going to create a larger opening in a wall between two rooms in my house from -47. An engineer has calculated that I should use an HEA180 to relieve the opening which will be up to 2.5 meters wide.
Today, a concrete slab rests on the wall, which is a load-bearing wall in the house and is currently made of hollow concrete block. The upper floor then has a framed wooden floor on the concrete slab, and a framed wooden wall that the rafters rest on.
I plan to support the concrete slab between the floors while I do the work. The question is how many studs do I need to place there so that I don't have the whole thing come crashing down on me when I remove the wall that currently supports it?
If I use 45x95 as studs and they stand on the concrete floor, how closely should they be placed? CC 500? Should I use thicker studs, or place them closer together?
Today, a concrete slab rests on the wall, which is a load-bearing wall in the house and is currently made of hollow concrete block. The upper floor then has a framed wooden floor on the concrete slab, and a framed wooden wall that the rafters rest on.
I plan to support the concrete slab between the floors while I do the work. The question is how many studs do I need to place there so that I don't have the whole thing come crashing down on me when I remove the wall that currently supports it?
If I use 45x95 as studs and they stand on the concrete floor, how closely should they be placed? CC 500? Should I use thicker studs, or place them closer together?
hard to really say.
at work when we cast houses, they use steel props and bockryggar (a wooden I-beam). it is placed along the ceiling standing and then the prop straight down below. these bockryggar with 1m spacing and then there is 600-1000 between the props...
nail and glue together 45x95 studs and place three-four on each side of the road so you are pretty safe. better too much than too little when it comes to concrete that doesn't bend but collapses immediately
at work when we cast houses, they use steel props and bockryggar (a wooden I-beam). it is placed along the ceiling standing and then the prop straight down below. these bockryggar with 1m spacing and then there is 600-1000 between the props...
nail and glue together 45x95 studs and place three-four on each side of the road so you are pretty safe. better too much than too little when it comes to concrete that doesn't bend but collapses immediately
Exactly, I prefer to set up a bit too many supports/props rather than take a chance.
"Nail and glue together 45x95 studs and place three or four on each side of the road" that means about 1 meter between the props. Better to glue together and place them like that, than 6-8 pieces CC500 without gluing together?
I assume you want to place the props as close to the wall as possible, but I need to leave some space to work as well, is it okay to place them a bit, say 800, from the wall?
"Nail and glue together 45x95 studs and place three or four on each side of the road" that means about 1 meter between the props. Better to glue together and place them like that, than 6-8 pieces CC500 without gluing together?
I assume you want to place the props as close to the wall as possible, but I need to leave some space to work as well, is it okay to place them a bit, say 800, from the wall?
Don't want to be stubborn, I just don't want to do anything unnecessarily
But if it contributes to a stronger construction, then I'll do it. I'll put together some studs tonight and place them there tomorrow. Do I need to have a horizontal stud, both top and bottom, when it's concrete, or does the concrete spread the forces well by itself?
And is it OK to place it a bit away from the wall so that you can reach?
Thanks for the good information. Just the fact that it makes it easier to move was smart thinking.
But if it contributes to a stronger construction, then I'll do it. I'll put together some studs tonight and place them there tomorrow. Do I need to have a horizontal stud, both top and bottom, when it's concrete, or does the concrete spread the forces well by itself?
And is it OK to place it a bit away from the wall so that you can reach?
Thanks for the good information. Just the fact that it makes it easier to move was smart thinking.
they spread quite well on their own but it doesn't hurt to spread it up there.
you should be able to place them at least 500-700 from the road without any problem.
hard to say really depends on what kind of concrete and hardness and amount of reinforcement etc. but 500-700 you are safe without problems.
you should be able to place them at least 500-700 from the road without any problem.
hard to say really depends on what kind of concrete and hardness and amount of reinforcement etc. but 500-700 you are safe without problems.
One wants the larger cross-sectional dimensions to reduce the risk of buckling.
Buckling is a stability problem that works somewhat like when you take a ruler and push from both ends towards the middle. Suddenly the load-bearing capacity disappears completely.
This is buckling.
The risk of buckling is assessed by calculating the slenderness ratio, which is essentially (there are many details to consider) the length divided by the smallest cross-sectional dimension.
Buckling is a stability problem that works somewhat like when you take a ruler and push from both ends towards the middle. Suddenly the load-bearing capacity disappears completely.
This is buckling.
The risk of buckling is assessed by calculating the slenderness ratio, which is essentially (there are many details to consider) the length divided by the smallest cross-sectional dimension.