... :in bundles 4.Size:Height100-630mm I beam steel Description: One kind of profile bars with "I" shape section, the specification is ... 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.