For an HS 25-44 truck load, the weight of the tractor truck is 25 tons, or 50,000 pounds. From Figure 6-2, the weight is distributed 20 percent to the front axle and 80 percent each to the rear tractor truck axle and semi trailer axle: Front axle load = 0.20(50,000) = 10,000 lb Rear tractor and semitrailer axle loads = 0.80(50,000) = 40,000 lb