W=SafeWorkingWeightLoad tons cwtEach/kg 50.11 100.17 150.35 1 100.66 2 01.02 3 01.57 3 152.3 5 03.2 6 04.3 7 05.4 9 106.8 11 58.7 13 011.0 14 514.3 16 520.0