channel steel 1)Size: 50x37x4.5mm-300x87x9.5mm 2)Material: Q195,Q215,Q235,A36,SS400,SS54 3)Packing:bundle with strips U CHANNEL BEAMS(CHINESE STANDARD)MATERIAL:Q235/SS400/ST37-2 and Q345/ST52 size(h*b*d)Theoretical Weightsize(h*b*d)Theoretical Weightsize(h*b*d)Theoretical Weightsize(h*b*d)Theoretical Weight50*37*4.55.438140*60*816.733220*79*928.453360*87*9.539.17363*40*4.86.634160*6.3*6.517.24240 ...