The loading/unloading door (3, 4) for a box superstructure of a truck comprises an overlap strip (9) which is attached to the inner wall (20) of the door (3), bridges the door gap, and overlaps a part of the adjacent door (4) or the side post.

The door leaf (2) is mounted on a swinging linkage (3,5), so that it can move outwards from a closed to an open position. The door seal has a blade (8) which engages on a flat horizontal surface of an L-shaped capping plate or sill (4.1) on the edge of the...