Non-Intermodal Flat Cars. GATX offers a variety of flat cars for non-intermodal service ranging in length from 60 to 89 feet, with loading capacities of 70 to 100 tons, and gross rail capacities of 220,000 to 286,000 lb. Our railcars are ideal for shipping commodities. such as lumber, steel products, wind blades, machinery, and miscellaneous.