Calculate loads for replacing a load-bearing wall

[Maria92]

Hello,
We have just bought a townhouse where we plan to renovate the kitchen and living room and remove the load-bearing wall between them on the entrance level. It is a 1.5-story house with a basement. There is a concrete slab between the basement and ground floor and wooden joists between the ground floor and the upper floor.

We plan to take down the wall but put up oak slats that we hope can be used to support part of the wall together with a glulam beam that we plan to integrate into the joists for an invisible solution. This would create two openings in the wall where we hope to use a smaller glulam beam. The openings will be about 170 cm each, and the slats will take up about 170 cm between the openings. It is about 4 m to the exterior walls on each side of the load-bearing wall. How do you calculate the dimensions for this? What should one consider when doing this kind of solution? Does anyone have tips on a good structural engineer in the Gothenburg area perhaps?

 

[sunqan]

Hi,
We have just bought a townhouse where we are going to renovate the kitchen and living room and remove the load-bearing wall between them on the entrance floor. It is a 1.5-story house with a basement. There is a concrete slab between the basement and the entrance floor and wooden beams between the entrance floor and the upper floor.

We are planning to take down the wall but put up oak slats that we hope can be used to support part of the wall along with a glulam beam that we plan to embed in the joist for an invisible solution. Then it will be like two openings in the wall instead where we hope to use a smaller glulam beam. The openings will be about 170 cm each, and the slats will occupy about 170 cm between the openings. It is about 4 meters to the outer walls on either side of the load-bearing wall. How do you calculate the dimensions for this? What should you consider when doing such a solution? Anyone have tips for a good engineer in the Gothenburg area maybe?

Not an answer to the question, but - don't forget to apply for planning permission...

 

[petererlandsson1194]

attach drawings to the post. Those knowledgeable in construction will ask that as the first question and also where in the country it is located. (snow zone)

 

[C.Lundin]

Not an answer to the question, but - don't forget to apply for a building permit...

A building permit is not required for such an intervention.

 

[BirgitS]

No building permit is needed for such an intervention.

But a construction notification is required.

 

[C.Lundin]

But a building notification is required.

That is correct.

 

[sunqan]

That's correct.

Ok. Thought it was a building permit to change load-bearing structures.

 

[BirgitS]

Ok. Trodde det var bygglov för att ändra bärande konstruktionrr

There is quite a small difference between planning permission and building notification when it comes to what needs to be submitted to the municipality.

 

[Maria92]

Here are some drawings... It's located in Göteborg.

 

[bossespecial]

The conditions are good for making a transition considering that there are both concrete slabs and concrete walls. However, it seems difficult to recess a beam into the slab, unfortunately, it should be placed below the slab.

 

[Maria92]

There are good conditions for being able to exchange with the consideration that there are both concrete beams and concrete walls. However, it seems difficult to embed a beam in the floor without it unfortunately needing to be placed under the floor.

Okay, what makes it difficult? It's a wooden floor that it should be embedded into, the concrete is in the basement and the wall to be removed is on the entrance level.

 

[bossespecial]

The difficulty lies in the fact that quite a lot is happening in that area, with a load-bearing wall from the ceiling and incoming beams from the sides, and then fitting a steel beam into it. It's not impossible, but it can easily become a more extensive operation compared to placing the beam in the ceiling.

 

[justusandersson]

Embedding beams in the joists is a great solution when building new, but unsuitable (expensive and complicated) when renovating. With the current dimensions of the house, I think there are conditions to reduce beam height by increasing beam width instead. Furthermore, I note that it is classic Gothenburg offices that designed and constructed it: Celander, Forser, Lindgren, and Fredrik Stang Lund!