... beam/girder, steel column/pillar), the secondary structure( roof and wall purlin, steel bracing, tie-bar, etc), door and windows, ... normal conditions. D. You can choose freely the roof and wall panel, included both types:a. Heat-Insulating material( EPS, ... ,75mm,100mm, 200mm), density, color, type, etc.b. Single color corrugated steel sheet( Steel Material: Aluminum- Zinc sheet):They have different ...