Replace load-bearing wall with beam

[bopakoster]

Hello!
I am renovating my courtyard house.
(demolished and rebuilding with new materials. https://www.byggahus.se/forum/threa...helt-eller-delvis.337652/page-25#post-3760989)
Now I'm considering achieving future room flexibility by replacing a load-bearing interior wall support beam with a beam that should be able to support two roofs according to the picture.

The length is 4.3m, the truss span is 4m, and the rafter (?) roof beams are 2m.
The roofs are boarded with underlay paper and covered with profiled steel sheet TP20. Snow zone 1.5 or 2 on an island on the west coast.

What dimensions should the beam have? Preferably thickness 70mm if available, so how tall should it be and how large a bearing surface is needed?

 

[justusandersson]

It's quite a large roof area it needs to support. If you want to be close to 70 mm in width, you can use a glulam beam that is 66x405 mm. However, I suggest 90x360 mm which provides a lower height. You can place it on 2 glulam columns that are 90x90 mm.

 

[bopakoster]

It's quite a large roof area it has to support. If you want to get close to 70 mm width, you can take a glulam beam that is 66x405 mm. However, I suggest 90x360 mm, which provides a lower height. You can place it on 2 glulam posts that are 90x90 mm.

Thanks for the quick response justusandersson!