Most railroads do a large part of their freight service with containers. The same is true of the Rhaetian Railroad in the Grisons. Since the same containers must be loaded on this narrow gauge railroad, a special design was necessary: The load surface is lowered between the trucks so that the car with a container loaded on it does not exceed the loading gauge. In addition to containers, transport frames can also be loaded on these cars, such as for logs, which can be transferred to standard gauge cars or to a truck for the last few kilometers / miles to the destination. There are different designs for these cars, chiefly in the arrangement of the handbrake: A handbrake crank is mounted on the brakeman's platform on one car, while on the other a large hand wheel to set the brakes is mounted on the side of the frame.