... -12m 3.Grade: Q235B, Q235, Q345B, SS400, A36 Hot rolled structural steel H beamGrade: Q235B, Q235, Q345B, SS400, A36…Standard: JIS/ ASTM ... ’ requirements.Usage: (1).used for the plant, high-rise building construction (2).used for the bridge, shipment building (3).used for lifting and transportation machinery ...