1.technology:hot rolled h beam 2.grade:Q235B Q345B 3.length:6m,9m,12m steel H beams is a new ... civil buildings 2.Steel carrying structure in the industrial buildings. 3.Columns and supporting structure in the underground engineering. 4.Industrial ... : H Steel,H beam.2)Grade: Q235B, Q345B, SS400, SM490B.3)Size: from 100X50X5X7mm to 912X302X18X34mm4)Length:9m or 12m5)Country ...