Rhine Bridge Hard-Fussach

Hard, Austria

Near Bregenz, shortly before the Rhine flows into Lake Constance, a bridge connects the two Vorarlberg communities of Hard and Fussach. In order to adapt the river-spanning structure to today's traffic requirements and also to provide improved flood safety, it was decided to demolish the existing bridge and build a new, modern replacement bridge.

For this purpose, the design envisaged a specially pre-stressed composite bridge of the "extradosed bridge" type - a relatively new bridge type in which the guidance of tendons runs outside the cross-section of the deck girder (French "extrados" = outside (arch) spine). In addition, there were other special architectural features, such as a special geometry of the piers, which were to "unfold" from a rhombus to a rectangle from bottom to top.

Construction Method
Special pre-stressed composite bridge of the extradosed type

Complex bridge geometry with exceptionally wide, asymmetrical cross-section and strict static specifications resulting from the special construction method

Customized composite formwork carriage with two longitudinal trusses and two additional rows of pendulum props in the cross-section as well as formwork wagon TU with special frame for the bridge edge-beams

Testimonal Portrait

Daniel Kopp | Foreman | HABAU Hoch- und Tiefbau GmbH

"For our infrastructure projects, we always need individual formwork solutions that are tailored to our needs. We can always rely on Doka's engineering know-how."

More impressions of the project in this video:

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Project data

Year of completion
Construction time
ca. 2 years
HABAU Hoch- & Tiefbau GmbH, MCE GmbH and WILHELM+MAYER Bau GmbH

Building data

Construction method
Special pre-stressed composite bridge of the extradosed type
Length of the bridge
255,6 m
Span width
24,4 m