Replacing a load-bearing wall

[Martin93]

Hello there!

I've read through everything I can find but still can't reach a conclusion. The idea is to remove a load-bearing wall and replace it with a laminated beam. According to calculations from Moelven, I find a suitable option in the form of a 66x315 beam. The minimum required bearing length is 141mm. The largest possible size for a column I can fit in the exterior wall is 115x115 to be able to build it in. Does this mean I need to choose a different type of beam if I want the column completely built-in, or have I got this wrong?

BR

 

[sblixten]

141 mm sounds incredibly much for such a slender beam built into the wall.
I think something went wrong in the calculation.
I'm convinced that 115 is more than enough or that it should be a much stronger beam.

A wider beam should provide less support length.
Another alternative is to screw-glue two 45x145 so you get a post of 90x145.

 

[TeroM]

Hello there!

I've read through everything I could find but still can't come to a conclusion. The idea is to remove a load-bearing wall and replace it with a glulam beam. According to calculations from Moelven, I find a suitable option in the form of a 66x315 beam. The minimum required support length is 141mm. The largest possible size of the post I can fit into the outer wall is 115x115 to be able to embed it. Does this mean I have to choose a different type of beam if I want the post fully embedded, or have I gotten this wrong?

Regards

I had a similar situation where I needed 115 mm according to the program but only have 90 mm available. Asked Moelven and got the response below.

There is a general addition of 30mm based on the post dimension that is not included in the program, so you don't need to worry about the support length, it's okay with 90mm.
(what you can do otherwise to reinforce the support is to insert long fully threaded screws into the underside of the beam and have a plate between posts, this way you spread the support load further into the beam)

My final decision was to go for a Kerto-S beam instead, as I could go from a 90x360 glulam to a 45x400 Kerto-S which also only requires 91 mm in support length.

And welcome to the forum on Byggahus!