steel I Beams /i beams(ASTM,JIS,EN) 1] Material : SS 400, ST37-2 , A36, S235 JRG1, Q235, Q345 etc. 2] Length : 6 m, 9 m itemmeasure(mm)hbt10100684.51212074514140805.51616088618180946.520a200100720b200102922a2201107.522b2201129.525a250116825b2501181028a2801228.528b28012410.530a3001269.030b30012811.032a3201309.532b32013211.532c32013413.536a3601361036b3601381236c3601401440a40014210.540b40014412. ...