Does anyone know the name of the trellis type stuff that is made from round timber usually about 2 inch diameter, it is made from what looks ike small tree branches as opposed to machined round timber.

Its a very open trellis with gaps about 12inch in size. the timber that makes the trellis is does not run horizontal and vertical but at 45 degrees and makes diamond shaped as opposed to squares.

Hope my description is good enough!

No idea what it's called - but I would stick with steel for the chassis

Rustic fencing, rustic trellis?

Rustic Diamond Trellis ?

thats what i would call it being Ex Focus DIY