... construction efficiency 3. Economic cost* Project scope:Industrial steel structure warehouse/workshop/hangar/garage/chicken shed,container house, ... prefabricated home,sandwich panel, welded H steel,C/Z channel,corrugated steel sheet,etc.* Products&Service Scope:Design ... welded H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall materials, ...