Because of the minimal concrete covers, the superstructure could be executed as a seven-webbed T-beam with a width of 3.20 m and a top thickness of only 9 cm minimized towards the edge. An accurate wood boarding was produced for the pre-cast components which are three-dimensionally curved by the longitudinal and cross slopes in connection with the arc-shape. The construction of the boarding required complex planning. Based on a conception with radial ribs, the boarding could finally be realized with simple, linear and planar wood components.