In the state of the art, a stop is swivellingly mounted on the bottom part of a channel by means of a hinge arrangement. The stop must be joined to the channel bottom part before the channel bottom part is secured to a wall. The invention allows the stop to be subsequently mounted on the channel bottom part, in that at least two hinges snap into profiles shaped on the stop and the channel bottom part in a mounting direction perpendicular to the axis of the hinges. The invention is useful for stationary installations.
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