... .1 Length : 6 meter, 9 meter,12meterMaterial : SS 400, ST37-2 , A36, S235,Q235, Q345 etcStandard: BS, JIS, ASTM, DIN, EN ... buildingDelivery date: within 20 days after receiving the LC or TT prepayInspection: accept third party inspectionChinese Standard size : 100*68*4 ... GB standard Hot Rolled steel I beam Q235/A36/ST37-2/SS400