35x80 Ceiling Joists - Equivalent size?

[marty3]

I am about to embark on a loft hatch enlarging project, I am trying to find some appropriately sized timber so I can sister some joists.

My current joists measure 35x80mm, I can't seem to find a direct replacements.

Is this an older joist size that is no longer used?

 

[catlad]

I can't say I have come across that size before, just use 3x2" instead.

 

[big-all]

are these truss rafters as in lots off triangles ??

 

[^woody^]

CLS

 

[big-all]

CLS

cls round here comes in 1.5/2.5/3.5 inch or 38/63/89mm??

 

[^woody^]

cls round here comes in 1.5/2.5/3.5 inch or 38/63/89mm??

Yes, but its as near as he's going to get

 

[big-all]

Yes, but its as near as he's going to get

yes off course i misunderstood