Hello,
I'm currently designing a project that will require creating an opening about 1500x2600mm in a load-bearing brick wall (450mm thick) in a multi-family building from the late 1920s.
To avoid the building collapsing, I will need to install steel beams to carry the load instead. The question is, however, what dimensions are needed. I also assume that, as the sketch shows, one should reinforce the supports that the beams rest on with steel beams (like UPE).
The weight of the brick directly above, which will rest on the beams, is about 12 tons (0.45 * 1.7 * 12 m * 1500 kg/m3), and then there are potential loads that it may carry as well.
If the project moves forward, I will need to hire a structural engineer to create the drawings and calculations for the building permit, but I'm still curious about how to calculate the necessary dimensions.
Does anyone know?
I'm currently designing a project that will require creating an opening about 1500x2600mm in a load-bearing brick wall (450mm thick) in a multi-family building from the late 1920s.
To avoid the building collapsing, I will need to install steel beams to carry the load instead. The question is, however, what dimensions are needed. I also assume that, as the sketch shows, one should reinforce the supports that the beams rest on with steel beams (like UPE).
The weight of the brick directly above, which will rest on the beams, is about 12 tons (0.45 * 1.7 * 12 m * 1500 kg/m3), and then there are potential loads that it may carry as well.
If the project moves forward, I will need to hire a structural engineer to create the drawings and calculations for the building permit, but I'm still curious about how to calculate the necessary dimensions.
Does anyone know?
Hey! The problem is probably getting the beams in place; it's difficult to prop them up. The bricks are probably hanging without the beams. The wall was about 45 cm; take one half at a time. As for the dimensions, I don't know anything, just speculations. ALT 2 Heb 200, 4 Vkr 90x5. Some welding is needed too.
yep, you probably have to do it in stages. First chisel out and insert horizontal HEB or HEA, then saw, chisel out for the vertical beams and put them in place, weld together and then remove the bricks in the middle.. and then you repeat the procedure from the other side again.. a real horse job but it's only good for the muscles =)
Interventions in load-bearing structures require a building notification, which often requires having a drawing and a quality responsible person. Then the association usually also requires a drawing to get approval from them. I advise you to contact a structural engineer for this work. Additionally, you can probably save some material. Normally, you can place the beams in the wall and avoid columns.
You probably don't need to account for all the brick above. Brick arches quite well. Are there openings above?
You probably don't need to account for all the brick above. Brick arches quite well. Are there openings above?
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A quick estimate suggests that a HE180A should handle the load. This is without knowing the spans of the overlying floors, but with an increase in moment from the self-weight of about 30%. You should have a more thorough calculation done.
You have to look at the whole picture. How does it look above? How high is the wall in your apartment? You want to see how the loads can be distributed (valva). In the best case, it might be enough with L-steel on each side that you mill into the wall before demolishing. If there are no complications, you should probably end up with something like 2 HEA 120. Pillars are probably not needed.
If you want to do some research yourself, visit the City Planning Office and look for construction drawings. You need drawings of your floor plan + the plans above and below. If you have those, it will be cheaper since the engineer won't need to make that visit.
If you are looking for an engineer, send a PM and maybe I can help you.
If you want to do some research yourself, visit the City Planning Office and look for construction drawings. You need drawings of your floor plan + the plans above and below. If you have those, it will be cheaper since the engineer won't need to make that visit.
If you are looking for an engineer, send a PM and maybe I can help you.