GB Channel Bar NOMINAL SIZE CHANNEL DIMENSION (MM) UNIT WEGITHT (KG/M) H*B t1 t2 5 50*37 4.5 7.0 5.438 6.3 63*40 4.8 7.5 6.634 6.5 65*40 4.8 7.5 6.709 8 80*43 5.0 8.0 8.045 10 100*48 5.3 8.5 10.007 12 120*53 5.5 9.0 12.059 12.6 126*53 5.5 9.0 12.318 14a 140*58 6.0 9.5 14.535 14b 140*60 8.0 9.5 16.733 16a 160*63 6.5 10.0 17.240 16 160*65 8.5 10.0 19.752 18a 180*68 7.0 10.5 20.174 18 180*70 9.0 10.5 23.000 20a 200*73 7.0 11.0 22.673 20 200*75 9.0 11.0 25.777 22a 220*77 7.0 11.5 24.999 22 220*79 9.0 11.5 28.453 25a 250*78 7.0 12.0 27.410 25b 250*80 9.0 12.0 31.335 25c 250*82 11.0 12.0 35.260 28a 280*82 7.5 12.5 31.427 28b 280*84 9.5 12.5 35.823 28c 280*86 11.5 12.5 40.219 30a 300*85 7.5 13.5 34.463 30b 300*87 9.5 13.5 39.173 30c 300*89 11.5 13.5 43.883 32a 320*88 8.0 14.0 38.083 32b 320*90 10.0 14.0 43.107 32c 320*92 12.0 14.0 48.131 36a 360*96 9.0 16.0 47.814 36b 360*98 11.0 16.0 53.466 36c 360*100 13.0 16.0 59.118 40a 400*100 10.5 18.0 58.928 40b 400*102 12.5 18.0 65.208 40c 400*104 14.5 18.0 71.488