site made glum or I beam strength
I need to span a beam on a timber cabin about 5M internally with a 1.6m exterior cantilever carrying a mono pitch roof made of 150mm joists plus insulation, OSB and decorative boards.
Whats stronger making one continuous I beam from OSB or PLY into 150mm plates across the the entire 13m width of the property then cladding that with 20mm boards or making up a Gluelam beam onsite from 150x 50 timbers?
What depth would I need to make them? I assume adding a double PL/OSB I would give it a lot more strength ?
I would prefer to avoid the toxic chemicals involved in making a GLUlam.,
Advice and help needed....