I-Beam 11# can be used for mine tram road size:9 ... :Q235 Length:8,9,10 standard:ISO9001:2000 11# I-Beam can be used for mine tram road size:9#,11 ... -50 KGS/M, the crane rail of QU70QU80QU100 & QU120, I-beam of the mine usage steel of 9#11# & 12#, U ... -Beam for the mine support steel of 25U29U & 36U, the fish ... our consumers from now on more than ten years. I-Beam 11#