channel steel 1)Size: 51x25x3mm-305x80x13mm 2)Material: Q195,Q215,Q235,A36,SS400,SS540 3)Packing:bundle with strips GB hot-rolled Channel Size Spec(MM)theoretical weight(kg/m) high 550*37*4.55.4386.363*40*4.86.634880*43*5.08.04510100*48*5.310.00712.6126*53*5.512.31814#a140*58*6.014.53514#b140*60*8.016.73316#a160*63*6.517.24016#b160*65*8.519.75418#a180*68*7.020.17418#b180*70*9.023.00020#a200737. ...