EXPERT-HEARING: WAGENHALLE VOHWINKEL OF THE WUPPERTAL SUSPENSION RAILROAD – CHALLENGES, POSSIBILITIES AND PERSPECTIVES OF A HERITAGE-FRIENDLY DEVELOPMENT

Since its construction around 1900, the Vohwinkel carriage shed has been used for the storage, maintenance, servicing and repair of suspension railway carriages. Today, the operational requirements for such a building have changed dramatically; static tests have also confirmed that the steel suspension girders have serious fatigue problems and a “remaining service life” limited to just a few years. Wuppertal’s public utilities are therefore planning to replace the existing hall with a new building and extend it at the same time. However, the monumental value of the building speaks against this, as this is the last part of the entire suspension railroad system still preserved in its original state and protected as a monument.

Initiated by an inquiry from the LVR Office for the Preservation of Monuments in the Rhineland, SPP 2255 therefore organized an expert hearing in August 2024 in collaboration with Wuppertal Stadtwerke. The aim was to first analyze the difficulties that stand in the way of further use of the existing building in more detail in order to then explore possible options and prospects for further use.

At the start of the hearing, Dipl.-Ing. Florian Biegall (TÜV Rheinland InterTraffic) explained the current planning status of the Wuppertal municipal utilities and their motives for a new building. This was followed by three presentations from the SPP 2255 group, which addressed various aspects of the argumentation. Dr. Kirsten Angermann (Bauhaus University Weimar) highlighted the high heritage value of the hall, Prof. Dr.-Ing. Frank Walther (TU Dortmund) gave an insight into the current possibilities of measurement-based condition monitoring (Condition and Structural Health Monitoring), Dr.-Ing. Oliver Mosig from the office of Prof. Steffen Marx (TU Dresden) subjected the existing fatigue calculation to a critical review; he came to the conclusion that the expected service life of the steel structure (of up to 100 years), based on a more precise calculation alone, is obviously significantly longer than previously assumed.

As a result of the controversial but always constructive discussions, the participants agreed to clarify two important issues by means of in-depth investigations over the course of the winter before making a decision on how to proceed – a building research study to identify the existing historical monuments and a measurement program to determine the actual (fatigue-related) load-bearing capacity of the structure. A further meeting is planned for spring 2025 to evaluate the results and possible consequences for further planning.

Following the hearing on the upcoming renovation of the striking steel structures at Tempelhof Airport in June 2024, this is the second “practical project” of SPP 2255. The initiators would like to express their sincere thanks to Wuppertaler Stadtwerke and its Technical Director Dr.-Ing. Christian Kindinger for hosting the successful event and for their willingness to put the already advanced plans to the test once again.

The photos were taken during a preliminary inspection in July 2024 (photo Werner Lorenz).

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