Abstract: The invention relates to a bottom discharge arrangement intended for mounting on goods container of a railway truck. The arrangement includes at least one pair of flaps which is pivotally mounted on the goods container at their mutually remote edges, so as to be able to swing between an open and a closed position in a plane perpendicular to the edges. The arrangement includes a two-arm lever which is common to the link systems and which functions to maneuver the flaps simultaneously. The lever arm is pivotally mounted centrally at a point between the pivot axes of the flaps and is pivotally connected at one end to a first link pivotally mounted on one flap and at the other end is pivotally connected to a second link pivotally mounted on the other flap. When the flaps are closed, the pivot points between the parts of the link system lie in an essentially forceless state of equilibrium in a common plane which is locked in this state of equilibrium by an operating device coacting with the link system.