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Tunable load sharing arch bridge

Image Number 5 for United States Patent #7146672.

A method and apparatus for adjusting the live and dead load balance between the arches of an arch bridge and the truss girder that supports the bridge deck. The method is achieved by providing a tension equalizing member across the bottom chord of the truss girder whose tension may be adjusted in cooperation with tension adjustments of hanger rods disposed between the arches and the bottom chords of the truss girder.

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