Switch off wall.

[Krozz]

I am considering replacing a load-bearing wall in my one-story house.
What I am wondering is if someone can help me calculate which glulam beam I need, as well as supports. It should be 6m long, attaching pictures.

The house is one-story with a basement. About 9.5x 8m.

Thanks in advance!

 

[justusandersson]

6 meters is a long stretch to transfer on such a heart wall. It will become an incredibly strong beam that, in a way, ruins the house. I also can't see that it adds much. Limit the opening to the wall between the kitchen and the adjacent room. Possibly, you can replace the two door openings with one, slightly wider one, so that you get a piece of wall between the two transfers.

 

[Krozz]

6 meters is a long span to transfer with such a load-bearing wall. It will require an incredibly strong beam that, in a way, ruins the house. I also don't see that it adds much. Limit the opening to the wall between the kitchen and the adjacent room. You could possibly replace the two door openings with one slightly wider one, so that you have a piece of wall between the two load transfers.

ok, I understand what you mean, but what if a support is placed in the middle?

attaching picture.

 

[justusandersson]

Yes, that's one way to do it. That significantly reduces the beam dimension. I just see no point in the opening to the right of the intended post. It only decreases the room's usability. I would close the door on the left and possibly make the other opening slightly larger.

 

[Krozz]

Yes, you can do that. That will significantly reduce the beam dimension. I just don't see the point of the opening to the right of the intended post. It just reduces the room's usability. I would close the door on the left and possibly make the other opening somewhat larger.

Great, do you know what dimension it needs to be?

We're planning an open floor plan. There will be a bar kitchen to the left of the post, and the rest of the room is a living/dining room.

 

[justusandersson]

Glulam 90x315 should be sufficient with margin. It is not a disadvantage if it is 6 m long even if it has support in the middle. The pillar must stand on the foundation wall directly below. A suitable pillar dimension could be 90x135 in glulam.

 

[Krozz]

Laminated wood 90x315 should be sufficient with a margin. It is not a disadvantage if it is 6 m long even if it has a support in the middle. The pillar must stand on the basement wall directly below. A suitable pillar dimension can be 90x135 in laminated wood.

that's great, thank you for the help!

 

[Krozz]

Glulam 90x315 should be sufficient with margin. It's not a disadvantage if it's 6 m long even if it has support in the middle. The column must stand on the basement wall directly below. A suitable column dimension might be 90x135 in glulam.

hi again, we are planning to potentially build an extra floor on top, is the dimension you mentioned still enough or should we go up a notch if so?

 

[Krozz]

Glulam 90x315 should suffice with margin. It is no disadvantage if it is 6 m long even if it has a support in the middle. The column must stand on the basement wall directly underneath. A suitable column dimension might be 90x135 in glulam.

By the way, can one use a steel beam to reduce the dimensions a bit?

 

[justusandersson]

It is likely that a larger beam dimension is needed if you are building an additional floor. That question cannot be answered without drawings of the extension. One can always choose steel instead of glulam. An HEA 160 is comparable to 90x315 glulam.

 

[Krozz]

Probably you need a larger beam dimension if you're building an additional floor. That question can't be answered without blueprints of the extension. You can always choose steel instead of glulam. A HEA 160 is comparable to 90x315 glulam.

ok, so a HEA 180 should be enough?

 

[justusandersson]

I don't want to say that an HEA 180 is enough if you're building an additional floor. It can go in different directions depending on how the extension is done.

 

[Krozz]

I don't want to say that an HEA 180 is sufficient if you're adding a floor. It can go in different directions depending on how the extension is done.

ok, thanks for the help

 

[Krozz]

Glulam 90x315 should suffice with a margin. There's no disadvantage if it's 6 m long even with a support in the middle. The pillar must stand on the basement wall directly underneath. A suitable pillar dimension might be 90x135 in glulam.

It seems difficult to find a pillar dimension of 90x135, can one use 115x115 instead?

 

[justusandersson]

can one use 115x115 instead?

Sure, but it's an advantage if the beam and column have roughly the same width.