... welding steel beam,included design and manufacuture, girder/beam, column, C and Z -shape purlin. Welding Steel Beam:Specs: Steel frames: ... Q235, Q345, etc.Roof and Wall Panels: Steel plates of 0.4 ... , beautiful appearances, and higher space efficiency 5) Steel structure workshop Can be used as warehouses, workshops ... : T/T, L/C welding steel beam