Steel structure workshop/building 1. Certificate:ISO9001:2000 & CE(DIN18800) 2. High construction efficiency 3. Economic c steel structure workshop / warehouse / building Details of steel structure workshop:Main Steel: Q345,Q235Column&Beam: Welded or Hot rolled H-sectionWall&Roof: EPS, Rockwool, PU sandwich ,corrugated steel sheetDoor: Roller shutter doorWindow: Plastic steel or Aluminum alloy ...