This is a model of a Rhaetian Railroad (RhB) four-axle side dump car as used in construction trains. The paint scheme and lettering are prototypical for Era VI. The unloading hatch can be opened and closed in DCC operation, thus allowing the car to be emptied anywhere on a layout. The car has metal solid wheelsets.  Length over the buffers 42 cm / 16-1/2".
 
The type Fa-u side dump car – exact designation single hopper dump car – is used on the Rhaetian Railroad chiefly in construction train service, mainly to haul ballast and distribute it to track laying sites. The side unloading hatches are characteristic for these cars. They can be opened upwards. The load can thus be unloaded directly to the side of the track. These cars were built in 1991 and the RhB has 10 units on its roster. These 10.44 meter / 33 foot 11 inch long and 21 metric ton cars can load 22 cubic meters or 34 metric tons.