Jun 10, 2004 · They are given a precise gross rail load, such as 220,000 pounds for a pair of 70-ton trucks, 286,000 pounds for today's standard 110-ton trucks, and so on. Once you have the gross rail load, the determining factor becomes the weight of the car. Subtract the weight of the car (the "LT WT") from the gross rail load, and you get the load limit