steel roof construction structures 1, Easy to install 2, attractive apprance 3, low cost steel roof construction structuresSome information about the products .1. ... , .250 inch thick steel2 Diagonal Support Beams are square HSS steel tubing, 4 inches by 4 inches, .125 inches thick, ... inches by 4 inches, .125 inches thick.25 inch thick Steel Foot plates (Cleats) welded to each end, with L-Shaped ...