Span width tongue and groove boards

[Ekol]

Hello!

I want to have 1.8m between my roof trusses with a roof pitch of 12 degrees.
The roof will have råspont and metal sheets.
So my question is whether the råspont can handle the span of 1.8m?

 

[SBH]

you can increase in thickness. but why do you want it like that?

 

[hakaner]

What thickness are you planning to have for the råspont?
21mm on c-c 1200 already feels a bit flimsy, but it should work...
On c-c 1800, I can't imagine it will work.

 

[Ekol]

I have come across these rafters, but they are only sufficient for a spacing of 1.8 meters.
I haven't decided on the thickness of the råspont.

 

[SBH]

can't you make more? ?

 

[Ekol]

Of course, I can do that, but it would have been nice to avoid it.
What thickness of råsponten? Any tips?

 

[camaro1969]

I have received a tip to skip råspont and instead use plastic as well as slightly sturdier studs to screw the roof into, maybe it could work with something like 45x95?

 

[hantverkare1]

Of course I can, but it would have been nice to avoid it.
What thickness of råspont? any tips?

I don't think there's råspont thicker than 22 mm, which is on the thin side.

Have you really calculated/let someone else calculate to have the roof trusses on cc 180.
It's not just the råspont that has to hold!

 

[SBH]

thicker than 22mm is special must be ordered. it becomes cheaper to complement with trusses

 

[vilpi]

My local hardware store has planed tongue and groove 28x120 in stock. Works fine as a floor in the attic storage, cc 1200.

 

[mlkjhr]

The key question is whether the trusses can handle standing at 1.8 m?

 

[Mikael_L]

If the trusses are designed for a higher snow zone than where they are currently used, it should be fine.

Let's hope that TS bought the trusses from Härjedalen then ...

 

[haavard]

What thickness are you planning for the raw planks?
21mm on c-c 1200 already feels a bit shaky, but it should work...
On c-c 1800, I can't imagine it would work.

On c-c 1200, more than 17mm raw plank is unnecessary.

 

[injonil]

If you've planned to use trusses for the gables, skip that and build "lösvirke" there instead. You can frame under the trusses, so graded lumber etc. is unnecessary.

 

[Ekol]

Thank you for all the answers!
My "takstolar" are laminated wooden beams from Moelven with the right dimensions for 1.8m. It's going to be a mono-pitched roof.
Unfortunately, I have already thought that I will build my own on the gables.

Might have to order a couple extra then...