supply steel frame Certificate:ISO9001:2000 Grade:Q235,Q345 customer designed,easy to install,nice appearance Steel Structures Steel Structure Warehouse/ steel structure Workshop Item NameSteel structure buildingSize20X50X5M slope:15%Design loadSnow load:10kg/m2,Wind speed:22m/s, Earthquake: Grade 7Main FrameQ345B Welded H BeamSecondary FrameQ235 C or Z section Purlin, Round BarBracing Angle ...