hi all
I'm currently building a new extension and I'm trying to work out the size of Rafters using the trada tables and I am being completely blind or stupid or possibly both.
The measurements are as follows:
Rafter Span = 4300 to external wall
Rafter spacing = ?
rise = 1100mm
Pitch =14.35 degrees
roof slope length =4438.4mm
Covering is with concrete tiles and the area is Wiltshire so believe the load to not be more than 0.75KN/m2
I think that the size required is 220x47mm,C16 graded with rafters spaced at 400mm, but could anyone confirm this please?
All posts gratefully recieved
Read more: //www.diynot.com/forums/roofin...ers-should-i-use-please.389859/#ixzz2qOtg4lWI
I'm currently building a new extension and I'm trying to work out the size of Rafters using the trada tables and I am being completely blind or stupid or possibly both.
The measurements are as follows:
Rafter Span = 4300 to external wall
Rafter spacing = ?
rise = 1100mm
Pitch =14.35 degrees
roof slope length =4438.4mm
Covering is with concrete tiles and the area is Wiltshire so believe the load to not be more than 0.75KN/m2
I think that the size required is 220x47mm,C16 graded with rafters spaced at 400mm, but could anyone confirm this please?
All posts gratefully recieved
Read more: //www.diynot.com/forums/roofin...ers-should-i-use-please.389859/#ixzz2qOtg4lWI