Lessons Learnt from the Structural Design and Construction of the Lille Langebro, Copenhagen

The Lille Langebro is a major new pedestrian and cycle bridge over the harbour in Copenhagen. The bridge forms a sleek, low level crossing that curves in plan as well as elevation. The superstructure consists of fabricated steel box sections of complex geometry and includes two balanced double cantilever spans on slew bearings which rotate to allow the passage of large ships. The rotating spans are fixed together in the closed position by an arrangement of proprietary mechanical components which form an innovative structural moment connection at mid-span. The complex nature of the structure presented many challenges to the design and construction that were successfully overcome through close cooperation between the client, designers and contractors. This paper will explain some of these challenges and the lessons that can be learnt for use in future projects.

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