hot rolled i beam steel / i steel beam Usage: Workshop,office,warehouses, single-layered heavy plants, large-span public build hot rolled i beam steel / i steel beamMaterial: SS400, ST37-2, A36, S235JRG1, Q235, Q345 etc.Standard: GB/JIS/EN/ASTM/DIN and others.Usage: Workshop,office,warehouses, single-layered heavy plants, large-span public builitemmeasure(mmm)hbdt10100554.57.212120644.87. ...