Hi i was hoping someone could assist me, we are looking to extend out home and i'm trying to put together some building regs drawings. The building is single storey mainly brick with curtain wall style glazing to the front which goes follows roof slope. Now with the glazing going so high i dont want a flat ceiling so there wont be any ceiling joists and new ceiling will needs to follow the rafter line underside.
1) Can these rafters be timber if so what size
2) what size timber purlins need to run between and at what centres
3) How are the rafters restrained to avoid pushing walls out as there isn't any cross timbers tying the rafters together like a normal truss.
Thanks in advance for any help.
1) Can these rafters be timber if so what size
2) what size timber purlins need to run between and at what centres
3) How are the rafters restrained to avoid pushing walls out as there isn't any cross timbers tying the rafters together like a normal truss.
Thanks in advance for any help.