Realization
2024-2025
Description
Realization: 2024 - 2025
Place: Project Stuttgart 21Hauptbahnhof, Germany
Description:
The steel structures of the FLA-type skylights for the Stuttgart 21 Hauptbahnhof project consist of a spatial welded structure with a diameter of approximately 17.5 m, comprising a ring girder (Ringträger), 256 radial V-profiles, and 60 cross-braces with custom geometries. The structure was designed with an emphasis on high geometric precision and the visual quality of the welds.
The ring girder was manufactured as a segmented welded structure; the V-profiles were robot-welded with 100% MT inspection of the welds; and the cross joints were assembled individually and 100% inspected using the UT method. Final pre-assembly took place in a production jig with 3D geometry inspection.
Manufacturing was carried out in accordance with EN 1090-2 (EXC3), with weld quality requirements per ISO 5817 – Grade B. The scope of NDT inspections (VT, MT, PT, UT) exceeded the standard requirements. Production quality was continuously verified through regular audits by Deutsche Bahn, focusing on the entire production process, including technological discipline and documentation. After complete pre-assembly, the structure was divided into shipping units while maintaining the required geometric accuracy.
Manufacture of the steel structure, including pre-assembly.
Customer: seele pilsen s.r.o.