National Road B11, Isar Bridge
A dominant feature of the new bridge is a tied-arch over River Isar with a span width of 68 metres. The construction elements arch and stiffening girders are planned in the cross section as parallelogram-shaped steel boxes. The upper and lower chords run over the webs with the same thickness to achieve clear lines in the elevation of the bridge.
The hangers, arranged radially to the arch, give the bridge a characteristic feature and a high recognition factor. The cross girders which support the deck slab are arranged between the hangers and are designed as steel boxes.
East of River Isar, a bridge over the Isar flooding area connects to the tied-arch bridge. This structure is a simple deck bridge with prefabricated elements made of prestressed concrete as well as cast in-situ concrete. The design features of the tied-arch bridge, such as an inclination of the arches and the shape of the substructures, are reiterated at selective points and adapted to achieve a continuous overall concept.