A dock leveler is a piece of loading dock equipment that corrects for differences in height to facilitate smooth loading and unloading. Loading docks have a fixed height, and truck beds might vary in height depending on design and load. This can lead to a problem with cargotransfer. The leveler creates a gently inclined platform for equipment, allowing personnel to quickly transfer goods between the truck and loading dock with a minimum of safety risks. Usually, dock levelers are fixed in place at a loading dock, although mobile designs also are available.