Bridges, Pedestrian Bridges

Bridge III across Enz river (“Eutinger Waagsteg”)

This bridge was built for the regional garden exhibition 1992. It crosses a reservoir lake and the aim was to reduce its visual exposure to a minimum.
A stress ribbon satisfies this requirement. In this case two strong abutments, two steel strips covered with concrete slabs plus handrails, were enough to build a footbridge. The sag of the stress ribbon almost touches the surface of the lake. The slope should not exceed 6 % in view of wheel chair users, which makes a very flat geometry. For stabilization against vibrations the railings with their friction damping were very efficient.

Pforzheim, Germany
Knoll, Reich, Lutz, Sindelfingen
Stadt Pforzheim / Landesgartenschau Pforzheim 1992

Technical Data

Total length
67.60 m
50 m
2.90 m
Steel ribbons
2 x 480 mm x 40 mm, St52-3
Concrete slab
lightweight concrete, 10 cm thick


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