Thursday, July 1, 2010

Cable-Stayed Bridges - North Arm Bridge (3)

A closer look at the towers of the North Arm Bridge. Note the steel walkway hanging from the side of the concrete box girder superstructure.

This is an extradosed bridge, which means some of the prestressing tendons have been replaced by shorter towers and cable-stays. It has a main span of 590 ft, side spans of 456 ft, and transition spans of 170 ft. The bridge is supported by two 143 ft tall towers and a pier on each side of the river (see Google Earth photo). The towers are a steel/ reinforced concrete composite structure that Buckland and Taylor seem to prefer. The bridge was completed in 2008.
Creative Commons License
Cable-Stayed Bridges - North Arm Bridge (3) by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.

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