... width (b)* middle thickness (d). application: Can be widely used in various construction structure, bridge,blackets,mechanism and so on ... performed,materials, specifcation, quantity, length, handling time,measure way. Steel Grade: Q235,SS400Standard: GB/T 700-1988 Size: Middle heigth ... For more information,please contact directly without any hestation. I beam, Steel I beam, Steel profile. GB Standard.