Semi truck trailers, flatbeds with tarp covers and containers can be loaded on this car. These cars are called pocket cars in Germany due to the pocket-like opening in their frames for the wheels of truck trailers. Sometimes they are nicknamed the kangaroo cars. Bt 10 flat cars for containers. Era III, cars come with separately applied data boards, NEM coupler pockets and close coupler mechanism.
Cars come with different car numbers.
Each car loaded with 3 removable coal containers, each container with a different serial number. A system of small containers was developed to satisfy the demand for transportation from smaller shippers. At the destination station these containers could be loaded onto special trailers belonging to the railroad, without the need for additional technical equipment, and delivered directly to the customer. All sorts of container shapes were developed over time. One of the most widely used containers was the so-called coal buckets.