Hi,
Can someone tell me, if I have a garage 7m X 7m and i want to put a flat roof on top will i have to use steel beams as you can't get wooden joist's 7m long. Should I run 2 steel beams across the roof and span them with 4X2 and then stirling board on top. Can someone point me in the right direction.
what size I beams will I need so the roof won't sag
Can someone tell me, if I have a garage 7m X 7m and i want to put a flat roof on top will i have to use steel beams as you can't get wooden joist's 7m long. Should I run 2 steel beams across the roof and span them with 4X2 and then stirling board on top. Can someone point me in the right direction.
what size I beams will I need so the roof won't sag 
