A drop platform structure for use with a loading dock is provided including a pair of elongated telescoping frame members, one of the members being pivotally secured to the dock and the other member being pivotally secured to a brace which is also pivotally secured to the dock. An elongated platform is slidably disposed with respect to the frame members and, upon retraction thereof, automatically telescopes the frame members so as to raise them from a generally horizontal to a generally vertical position.
A transfer bridge for bridging across railroad tracks. The transfer bridge includes a bridge plate that can be pivoted from a vertical rest position into a horizontal operative position, in which the free end of the bridge plate rests upon a platform next to the tracks. In addition, a travel mechanism that is movable parallel to the tracks is associated with the bridge. In order to achieve a simplified and smaller construction for the travel mechanism, the latter is provided with an upwardly extending boom that is held in a guide rail to keep it from tilting.
