Glued laminated beam instead of pillar

[Missionshuset Roslagen]

Hello!

I am sketching a fairly large loft to be built between two concrete walls (outer walls) and an inner wall, like an angular U... The floor structure will need to be attached to all of these walls.

Since I don't know exactly how the inner wall is constructed and how much load it can bear, I want to reinforce the floor structure/loading beam with a column on that wall.

For various reasons, I want the column to extend as little as possible from the wall.

Question: Is it unwise to use a laminated beam as a column, e.g., 42/56x180 instead of a dedicated column, e.g., 90x90?

I realize, of course, that the load-bearing capacity will likely be reduced, but since the flooring is already going to be attached to two load-bearing walls, I think the load should not be too high at that specific point.

 

[Anonymiserad 405730]

If the pillar stands by itself, it is not recommended to use a narrow pole (your intended glulam) because it will bend more easily than a 90x90..
But if it is against a wall, a narrower one works as you can fasten it in the weak direction, so to speak..

 

[Missionshuset Roslagen]

If it's against a wall, it works with a narrower one as you can attach it in the weak direction, so to speak..

Thank you. This was exactly what I was considering. So attaching it to the existing wall (seems to be plasterboard and OSB).

 

[qvirre]

Don't forget that the load must also be able to be picked up under the post. It will be a larger point load there.

 

[Missionshuset Roslagen]

Don't forget that the load must be able to be picked up under the post as well. It will be a larger point load there.

Absolutely. But that shouldn't be a problem. It's an apartment and therefore concrete under the floor.

 

[qvirre]

Absolutely. But there should not be any problems. It's an apartment and therefore concrete under the floor.

I wouldn't feel safe with that. So it's a concrete intermediate floor with an apartment below?

Are you sure it is designed to handle the increased point load? The force needs to be carried all the way down to the foundation.

If you imagine a regular villa concrete slab, it's both thicker and significantly more reinforced where line load and point load need to be absorbed.

 

[Missionshuset Roslagen]

I wouldn’t feel comfortable with that. So it's a concrete intermediate floor with an apartment below?

Are you sure it’s dimensioned to handle the increased point load? The force needs to be transferred down to the foundation.

If you think of a typical residential concrete slab, it's both thicker and significantly more reinforced where line load and point load are to be absorbed.

Yes, exactly. It's an intermediate floor.

But good point. Maybe not entirely straightforward. I'll think about it a bit more, but one should at least distribute the load on more than one column.

I might end up consulting a structural engineer before breaking ground. As mentioned, it's quite a large loft.