Industrial Steel Structure Workshop Building Structure System: Portal Frame Design loads: wind load, snow load, live load, dead load 1. Primary Steel Frame: I beam with anti-rusting, fire-proofing coatings 2. Secondary Structure: C, Z purlins with galvanized surface treatment 3. Support Structural Part: Tie Bracing, Bracing Bars, Angle Steels, all these will improve the stability and durability of the whole structural building. 4. Roof & Wall Materials: Polyurethane Panel 6. Window: Aluminum alloy Windows 8. Door: E-roller door, Sectional door