Bulk freight not sensitive to weather has always been important freight for the railroad. For that reason a total of 16,200 units of the type Otmm 70/Ed 90/Fc 090 were built. They are thereby the side dump car on the German Railroad, Inc. built in the largest quantities. With a wheel base of 6 meters / 19 feet 8-1/4 inches and a length over the buffers of 9.64 meters / 31 feet 7-9/16" these cars offer a load volume of 40.0 cubic meters / 1,412 cubic feet. The car weight empty is 11.6 metric tons. During the unloading procedure the freight slides to the openings in the center of the car. These openings are closed with slide bars thus allowing measured unloading. The freight load is conveyed by means of slide extensions from the exit openings to the side of the car.