• Three-Segment Folding Bridge Kieler Hörn
    © Klaus Frahm
Projects

Three-Segment Folding Bridge Kieler Hörn

Kiel, Germany, 1997

This footbridge is frequently used on the way from the main train station to cross the inner harbour at the southern end of Kiel Fjord. A new folding mechanism, developed deliberately without any hidden dynamics, enables ships to pass through. The sea jetty made of girder grids with rolled steel profiles reflects the industrial surrounding with ships and cranes. At the points marking its thirds, the folding part of the deck is subdivided by hinges. The deck is borne on both sides by two cables that are deviated via two mast portals and are anchored in the foundation of the jetty. One mast portal is connected rigidly with the deck, both portals have hinged joints at their bases. In this way, not only does an eye-catching movement unfold, but the surface area exposed to wind is also reduced. In all positions and under all loads the cable system is statically determinate. With a view to a sustained and robust operation the bridge features the simplest possible drive system.


  • Location

    Kiel, Germany

  • Architect

    gmp · Architekten von Gerkan, Marg und Partner

  • Client

    Landeshauptstadt Kiel

  • Contractor

    Neptun Stahl Objektbau, Rostock

  • Our Scope of Work

    conceptual design, construction design, site supervision

Video of Folding Bridge in Kiel

To learn more about this project, download our iBook or visit our Microsite about moveables structures (Three-Span Folding Bridge: Chapter 7)

 

moveables structures

  • Total length of bridge 105 m
  • Deck width 5 m
  • Covering broad oak planks
  • Drive 2 hydraulic motors with 44 kW each, winches running with constant torque
  • Main span 26 m (total length of the three folding segments)
  • Weight of folding part 54 t
  • Movements per day 8.9 (winter), 11.4 (summer)
  • Folding time open/close in approx. 2 minutes each
  • Three-Segment Folding Bridge Kieler Hörn © Klaus Frahm
  • Three-Segment Folding Bridge Kieler Hörn © Klaus Frahm

Project location

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