... ,Q215,Q235,A36,SS400,SS540 3.Length: 6m,9m,12m Channel Steel 1.Size: 51x25x3mm-305x80x13mm 2.Material: Q195,Q215,Q235 ... .Perforated:not perforated or as per your request. Standardh(mm)b(mm)d(mm)Theoretic WeightBSC2*1*1/8512532.37 kg ... .837.00 kg/mC12*30305801345.00 kg/m hot rolled channel steel