steel H-beam Q235 for construction: (1)Grade: Q235 Q345 A36 SS400, etc (2 ... : 6-12mStandard: ASTMSpecificationssteel H-beams Q235B Hot rolled Steel H beam Grade:Q235B,SS400,Q345B,A36 Size:100* ... 100mm-900*300mm Length:6m 10m 12mQ235B Hot rolled Steel H beam Grade:Q235B,SS400,Q345B,A36 Size: ... .5233428*407203524361.4284458*417305024529.3415498*432457024770.8605 steel H-beam Q235 for construction