... W-beam (for "wide flange"), Universal Beam (UB), Rolled Steel Joist (RSJ), or double-T (especially in Polish, Bulgarian, Spanish ... GB, JISMaterialSS400, Q 235B,S235JR,Q345B, S355JRBrandJINXI ,MA STEEL,LAI WU ,RI ZHAO,TANG STEELTechnique1.Hot rolled 2.WeldedApplication1 ... power and other industrial equipment structure 4.Large span steel bridge components 5.Ships, machinery manufacturing frame structure ...