Abstract: In a multiple-span bridge structure with side-by-side bridges, a scaffolding girder-formwork assembly is movable in the longitudinal direction of each bridge for constructing individual sections of the superstructure over support piers. After use on one bridge, the scaffolding girder-formwork assembly is movable to the other bridge by first rotating it about a vertical axis from the longitudinal direction of the bridge to the transverse direction while the assembly is centered over a pier of the one bridge. A support for the assembly is moved over a pier on the other bridge. Then the assembly is moved in the transverse direction until it is centered over the pier of the other bridge. Subsequently, the assembly is rotated into the longitudinal direction of the other bridge in position for constructing sections of the superstructure.