A system and method for handling and transporting moist bulk grain by-products include a rail car having an aluminum car body carried by a plurality of trucks for engaging rails. A flexible top cover, supported by a plurality of breakaway curved ribs, is positioned over an open top of the rail car to protect the moist bulk grain by-products carried therein. The car body has a front end and a rear end each having a wind screen for spoiling or deflecting the flow of air over the car as it moves to prevent the flexible top cover from being lost or damaged. The car may be emptied by a car inverter over a conveyor, such as a reciprocating floor which carries the moist grain by-products to a mixer, or transportation vehicles for distribution to customers or users of the grain by-products.