Bolt in wood joint, minimum anchorage length?

[Ahmada]

Use construction screws. Type ET-T I screwed up all laminated beams up to 420x 115 mm with that screw. [link]

Thanks, will also calculate on this.

 

[Ahmada]

What is the reason for nailing it to two new studs?

The two new ones are trusses (cc 600) for a conservatory. They should be attached to the existing building's truss. Mainly to transfer wind load.

 

[bossespecial]

You don't have a sketch/drawing to look at so you can understand the whole picture

 

[Ahmada]

You don't have a sketch/drawing we can look at to understand the whole picture

Here you go

 

[bossespecial]

If the new roof beams are supported by the existing exterior wall, it is sufficient to screw them to the existing roof truss. In that case, you might not need to extend them all the way to the roof truss but attach them to the exterior wall?

 

[Ahmada]

If the new roof beams have support on the existing outer wall, it is enough to screw them to the existing roof truss. In such a case, you might not need to extend them all the way to the roof truss but attach them to the outer wall instead?

Hmm.. I need to think about this. I believe it might cause issues with too low a slope on the new roof. I'm also not sure yet how the support at the outer wall should look.

 

[bossespecial]

Hmm.. I need to think about this. I think it might possibly cause problems with too low a slope on the new roof. I'm also not sure yet what the support at the outer wall should look like.

You don't need to lower the roof slope; instead, you can prop up the beams from the top plate level.

 

[HEA260]

You don't need to lower the roof pitch; you can post up the joists from the top plate level.

If you post up the joists from the top plate level, will it be strong enough to handle the horizontal load (wind load)?

 

[sinuslinus]

Looks very flat for roof tiles.

 

[bossespecial]

If you list the studs from the top plate level, will it be strong enough to handle the horizontal load (wind load)?

There are several ways to handle the H-loads. One option is to connect the roof beam to the truss as intended but let the vertical load go down into the outer wall.

 

[HEA260]

Looks very flat for roof tiles.

I agree, however, only a few tiles will lie that flat. Hopefully, the roofing felt will handle any water intrusion.

 

[HEA260]

There are several ways to handle the H-loads. One option is to connect the roof rafter to the roof truss as intended but let the vertical load go down into the outer wall.

Now we're on the same page! I also want to connect the horizontal load to the roof truss and use the outer wall for the vertical load.

Would you connect the roof rafter to the roof truss with 2 bolts M10 + nut + washer or something else?

 

[sinuslinus]

Let go of the idea of using a through bolt and nut. Instead, you are weakening the existing construction.

 

[HEA260]

Forget about through bolts and nuts. You are weakening the existing construction instead.

What would you have done instead?

 

[bossespecial]

Isn't it enough to just add a new roof truss in line with the existing rafters and connect them with nail plates (brädlaskar) and a few anchor screws?