Bridges, Moveables, Pedestrian Bridges

Three-Segment Folding Bridge Kieler Hörn

© Klaus Frahm

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
Owner
Landeshauptstadt Kiel
Partner
Jörg Schlaich / Rudolf Bergermann

Technical Data

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

Lectures

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