Carrying out a wall breakthrough - What to consider?

Hello house builder,

I plan to make a wall opening in my future house:

The problem: Load-bearing wall.
The solution: Steel lintel (will be calculated by the structural engineer beforehand).
The question: How can the installation be done?

Is my approach to installing the lintel correct?
1. Support the ceiling with props (borrowed from the drywall installer).
2. Make an opening at the top of the wall for the double T steel lintel.
The lintel should rest on the masonry (115mm).
3. Attach the lintel and fill with packing mortar -> Wait until everything is solid.

4. Begin the wall opening. (with angle grinder + demolition hammer)
5. Plaster everything neatly. -> Done?


Thank you very much for your suggestions. I hope I’m not being too naive about this!

Best regards
Klaus.

Su already knows everything.
However, try to avoid unnecessary vibrations.
Possibly add a steel plate between the wall and the beam.

Between the ceiling and lintels, still [Doka's] or beams.

Thank you for the answer. Unnecessary vibrations during demolition then? (So no jackhammer + sledgehammer?) How do you mean installing a Doka (?What is that ) or beam between ceiling and lintel. Unfortunately, I cannot imagine that. The steel support makes sense. Thanks and regards Klaus

I would advise against using a rotary hammer. First, flex the wall at the corresponding spots from both sides, depending on what kind of flex you have. Then try to loosen the stones with a hammer, possibly crowbar, and chisel. Doka is the manufacturer of formwork and shoring technology. Basically, these are wooden beams that are placed on the supports and under the ceiling to be supported. This distributes the ceiling load and does not just support it at single points.

Ah thanks, I would have done it exactly like in the photo. We have a proper angle grinder.

So, I talked to a couple of architects and the cheapest is 600€... I expected less.

Is an expert opinion from a structural engineer absolutely necessary? I will definitely install a steel beam lintel (as in my sketch above). What do you think?

Thanks and regards, Klaus.

It would be sensible to consult a structural engineer.

You don't know whether the wall is load-bearing or which beam you need to insert into the wall in what size. Also whether you can lay the beam on the wall or if you have to place it on additional supports anchored to the floor slab/ basement ceiling.

However, I don't believe that a 115mm wall is load-bearing. What material is the wall made of? What is above it? Does the roof truss rest on the wall or a wall of the upper floor?

Do you have the old structural plans from when the house was built?