curved roof construction

[Robbox]

I want to create a roof structure for curved corrugated steel roofing sheets. It's going to be around 2.4m wide by 4.8m long.

I was thinking of making up curved rafters out of two pieces of ply with solid wood spacers. Cutting the ply in a curve section by jigsaw and screwing/gluing the spacers in-between.

Then skinning the roof in ply sheet.

So is this entirely feasible and if so, how deep should the ply rafter sections be to give it the strength?

 

[Harbourwoodwork]

my instinct is to laminate in solid wood and bend it round a curved jig like making deck beams for a boat,probably 5 or 6 inches deep

 

[foxhole]

I would forget the spacers and laminate the ply together, say 4 18mm ply sheets which give a support 72mm wide which will be very strong, in confine spaces or difficult access this method is use to create structural support where a steel would normally be used and is very strong. Depending on the height of curve you could get several from an 8x4 sheet.A curve height of 300mm should suffice.