... structure 2.Light weight structrul steel steel structure of sandwich panel 1. Item Name: steel structure warehouse/ workshop2. Steel Material ... conditions.D. You can choose freely the roof and wall panel, included both types:a. Heat-Insulating material( EPS, ... so many accessories, for example, steel bracket, bolts, self-drilling screw, rivet, inter and outer cullis, rainspout, trimming sheet, glass ...