As part of the "Modernization of the Rothenburgsort S-Bahn station" project, Deutsche Bahn is renewing the railroad bridges at the Hamburg site through DB Bahnbau Gruppe GmbH. To this end, the old bridges are being replaced by a new construction of the "Billhorner Deich" S-Bahn bridge. As part of the specific construction project, four auxiliary bridges had to be transported from DB's auxiliary bridge warehouse in Konz to the Billhorner Deich railroad overpass in Hamburg and installed using a 500-ton crane. In addition, two support towers were to be installed with the help of a
100t crane. Brückenwerkstatt Dresden acted as the contractor for the installation of the temporary bridges.

The heavy-duty transport of the four auxiliary bridges, measuring 22/24 x 3 x 1 meters and weighing 54.1t and 58.7t respectively, had to be planned and organized so that the bridges could arrive at the construction site just in time within precisely defined time windows and be lifted into place immediately. The bridges were assembled immediately afterwards. Extremely high demands were placed on the 500-tonne crane, especially for lifting. The considerable soil load on the construction site and the corresponding soil conditions had to be checked and secured.

BigMove partner Gustav Seeland GmbH from Hamburg was responsible for the overall coordination, technical advice, precise planning and monitoring of the project with the following sub-steps: With the help of a 100t crane, the two support towers, each weighing 15t, and the four support beams for the 500t crane were installed on July 6, 2020. The BigMove partners Gustav Seeland GmbH from Hamburg and Spedition Gutmann
KG from Kehl each provided two special vehicles with a total length of over 30 meters as well as escort vehicles and carried out the transport of the four auxiliary bridges over a distance of over 600 kilometers between July 3 and 8, 2020.

A 500t crane was set up in advance, its support pressures and ground load analyzed and secured using appropriate measures. The four auxiliary bridges were delivered on two consecutive nights just in time within the agreed time window, so that the lifting was even completed ahead of schedule and the assembly team could start accordingly. The 500t crane was again dismantled on schedule with the 100t auxiliary crane.