Automatically centering load support for shuttle vehicles having a variable receiving width

A single-level rack serving apparatus for transporting load units, which comprises two chassis halves comprising a first chassis half and a second chassis half with each having a pair of rollers and each having an extendible arm, a storage region between the chassis halves and a connection structure, wherein the chassis halves are connected to one another by the connection structure and travel on running rails via the rollers, and wherein the arm of the first chassis half comprises a first arm and the arm of the second chassis half comprises a second arm and the arms serve to pull up or push down load units onto or from the storage region which comprises at least two first and second lateral flat supporting plates for supportingly carrying the load units, wherein the size of the storage region can be varied by varying the spacing between the arms together with the lateral supporting plates, and wherein a further third flat supporting plate is arranged and configured between the first and second lateral supporting plates such that it supports a load unit centrally from below in the storage region irrespective of the size of the storage region and without overlap of the supporting plates.