In 1993 the Blankenburg Research and Development Facility (FEW) presented the
prototype of a new efficient, four-axle dual side dump car, the type Fas 126. Starting in
1994 the German Railroad, Inc. (DB AG) purchased a total of 250 of these cars. The most important use for these bulk freight cars was the transport of construction materials for the modernization of the
infrastructure in the reunited Germany and specially for the transport of debris and
material for the large construction projects in
and around Berlin. The large loading capacity of 59 metric tons, the ability to dump on both sides of the car, built-in pneumatic cylinders and automatic control of the unloading hatches are the most important features of this new type of bulk freight car. These cars are used in unit trains and can be run at a maximum speed of 100 km/h or 63 mph.