Hello All. I'm trying to evaluate a design based on first principles. I have 2 trusses made from RHS (simple A frame) between which I wish to tech-screw a sheet of 2.9 mm galvanised sheet. Loading will primarily be from material (i.e. soil to a max depth of 400 mm) being placed on the steel sheet. I intend to analyse this setup like a beam - assume a UDL over the span, calculate reactions provided by the trusses, determine shear and bending moment diagrams. at the point of maximum bending moment, i will evaluate the stress (σ=My/I), and hope that it is less than the yield stress of the sheet. Am I on the right track? Does analysing steel sheets have any special rules or idiosyncracies? Any feedback would be greatly appreciated.