Partition wall to support floor joists, dimension

[justusandersson]

The unstayed height of the beams is an important parameter for assessing their load-bearing capacity. Even small changes can have a significant impact. With a height of only 2.3 m, the margins for C 14 timber increase. With this new information, I would say that from a strength perspective it is OK with C 14 timber. However, my previously stated objections to timber with too low a strength class remain.

 

[bossespecial]

What is the foundation of the house today? As previously mentioned, the load on the new walls increases compared to before.

 

[Promiscuos Monkey]

There is a total of 12 meters of wall
With the advice I've received here
?
45 x 70 C24
construction plywood on both sides
6 mm gypsum

What type of foundation do you have for the house today? As previously mentioned, the load increases under the new walls compared to before.

The house is not built yet

 

[Promiscuos Monkey]

What kind of foundation do you have for the house today? As previously mentioned, the load under the new walls increases compared to before.

House not built yet

 

[bossespecial]

It is 12 meters of wall in total
With the advice I've received here
?
45 x 70 C24
construction plywood on both sides
6 mm gypsum

The house is not built yet

Ok, I understood it as if it was an existing one. 45x70cc450 C14 with bracing at mid-height works without plywood. If you choose plywood, you can go up to cc600. It is advisable that the wall's cc-measurement coincides with the floor joists.

 

[justusandersson]

I agree with @bossespecial. Quite important that the beams are positioned correctly above each corresponding rule.

 

[Promiscuos Monkey]

Thank you so much for all the help.

 

[Promiscuos Monkey]

If I wanted to build the wall with metal studs?

 

[Tomture61]

If you are referring to steel studs used for building interior walls, these are not for load-bearing walls.

 

[Tomture61]

45x70 in c24 quality seems to be very difficult to find!
I wonder what happens if you split a 45x145 c24 into 2 pieces of 45x70?
Is it still c24 quality then

I have experienced c24 timber from Södra with a hell of a lot of knots, even on the edges, 30-40 mm large.

 

[bossespecial]

When determining the quality of the beams, this is done mechanically by calculating the beam's modulus of elasticity (E-modulus). This is done by measuring the shockwave response or by bending the beam. Splitting a graded beam could practically mean that you might get a "good piece" and a "bad piece," but together as a beam, the better compensates for the worse. According to a source at a sawmill, c24 timber often contains higher strength classes since the market for higher strengths is quite small.
Why do you want such a thin wall, by the way?

 

[sinuslinus]

High risk of the pieces warping when splitting in the middle.