Floor joists with support beam on posts.

[huggan]

Considering building a garage that is 12*7 meters. On the upper floor, there will be an apartment, and the span of the floor will then be approximately 7 meters. I was thinking of having a support beam in the middle supported by posts with a spacing of 3 meters. What dimensions should the support beam and posts have? The floor joists are 220*45 and should handle 2.0 kN/m[SUP]2.[/SUP]

 

[larsbj]

2 pieces nailed together 220 x45 according to a free program on byggbeskrivningar.se

 

[huggan]

Are you talking about bärlina or?

 

[larsbj]

You mean bärlina or?

Yes. The posts are sufficient with 45x120

 

[huggan]

But how did you calculate the support beam? Which calculation did you use?

 

[larsbj]

I used the calculation to fill a hole in an interior wall in a house, as it results in the same load.

The answer might sound unnecessarily coarse, but that's probably partly because free programs tend to be a bit overcautious and because it calculates on the joint on each stud.

 

[huggan]

Better safe than sorry. Works fine with a 220'45. Glad I don't have to use limträbalk.

 

[huggan]

However, it wants a liimträbalk over each garage opening.

 

[larsbj]

Better safe than sorry. works fine with a 220'45. Glad I can avoid the glue-laminated beam.

I mean 2 pieces of 220x45 placed side by side, nailed/screwed together as a bearer.

 

[huggan]

Oh, forgot that you wrote 2n

 

[Granngubben]

Are you in agreement on the pillar length? It affects the sizing.

 

[huggan]

Ran it myself now and this was the result:

Bärlina: L40c 90*225 Laminated timber
Stolpe: C14 45*145

 

[larsbj]

Are you agreed on the column length? It affects the sizing.

The column dimension applies to a normal ceiling height of 2400mm, but maybe it should be higher?

Aesthetically, I would choose square posts, for example, 95x95

 

[huggan]

It is 2400.

 

[huggan]

This is what it will probably look like then.