Beam sizing

[MattiasAng]

Hello, My first thread here : )

Starting a small renovation, New kitchen, ventilated floor, and underfloor heating

But I need to start by modifying a couple of rafters for the new kitchen.

Maybe someone here has similar conditions, or knows how to calculate roughly. I want to order the beam as soon as possible!

The opening will be 3.6m on a load-bearing wall.

The house was built around 1970, 1.5-story Skidstahus. Snow load 3.5 kN/m2
38-degree roof pitch.
Steel beam is a requirement due to construction height.

LxW: 13x8.2 exterior dimensions

Thanks in advance

 

[Onsalakorven]

Hi,

Quick guess IPE180, maybe one size larger. How do I know that? Partly because I calculated it for our 3.6m large offset, and also because the house designer chose the same one for our bay window. However, it's just a single-story, so maybe slightly larger.

Best regards, Andreas

 

[Onsalakorven]

Hello,

Quick guess IPE180, maybe one size larger. How do I know this? Partly I calculated it for our 3.6m large deflection, and the house designer chose a similar one for our bay window. However, it's only one floor, hence maybe slightly larger.

Best regards, Andreas

I see I've read the drawing incorrectly (or not at all). There's a support in the middle of the house, not along the wall. Then IPE180 should be sufficient, and it takes up little space. Otherwise, some glulam beam might also work well.