... :9#,11#,12#,20# Materials:Q235 Length:8,9,10 standard:ISO9001:2000 11# I-Beam can be used for mine tram road ... size:9#,11#,12#,20# Materials:Q235Length:8,9,10standard:ISO9001 ... rail of 8-30 KGS/M, the heavy rail of 38-50 KGS/M, the crane rail of QU70QU80QU100 & QU120, I-beam of ...