Workshop on a slope 2

[ptomharper]

Hi all

I'm not sure if anyone remembers but I came here to ask for advice on my workshop on a slope. I had the ground levelled and ordered the 75m line pump for concrete. So glad I went for the slab over a timber floor construction as suggested.

Now looking to order materials, my next question comes with the roof construction. It will be a dual pitched roof spanning 4.8m. I want to insulate between the rafters so I get the full height inside, therefore I don't need any ceiling joists for a ceiling but is it still necessary to tie in the roof on every rafter or could I use 2 or 3 hefty ties (8x2's?) evenly spaced along the building to tie in the walls? I hope this makes sense. Any help is greatly appreciate!

P.s excuse the drawing

 

[fuse]

What are the walls made of?

 

[ptomharper]

What are the walls made of?

4x2 timber stud. OSB sheathing. Battens and larch cladding.

Thanks, Patrick

 

[Malc2098]

Somewhere in here, the forum, @Mike G describes a 'structural ridge' which does not require ties, I think.

I certainly used that design for my 'shop build. I dis put three ties in at each end, but used them for storage.

 

[Mike G]

........or could I use 2 or 3 hefty ties (8x2's?) evenly spaced along the building to tie in the walls? ...

Yes, so long as the wall plates are continuous, or are doubled with staggered joins.

 

[ptomharper]

Somewhere in here, the forum, @Mike G describes a 'structural ridge' which does not require ties, I think.

I certainly used that design for my 'shop build. I dis put three ties in at each end, but used them for storage.View attachment 54599

Just what I was thinking too. Would be some handy storage.

 

[ptomharper]

Yes, so long as the wall plates are continuous, or are doubled with staggered joins.

Great! Thanks Mike. Noted. Will keep the cost down for sure.

 

[Mike G]

Just what I was thinking too. Would be some handy storage.

If you are going to use your ties for storage, then you'll need to use 250 x 50s, or, 200x50 with hangers (from the ridge). If you don't intend loading the ties, you could use 10 or 12m steel rod, supported in the middle by something hanging from the ridge (usually more of the same rod). You'll need plates welded on the end to screw securely to the wall plates.