Design
In a cable-stayed bridge, instead of hanging the roadbed from cables slung between towers, the cables run directly between the roadbed and the towers. Although cable-stayed bridges have been common in Europe since World War II, they are relatively new to North America.
The bridge concept was developed by Swiss civil engineer Christian Menn and its design was engineered by American civil engineer Ruchu Hsu with Parsons Brinckerhoff. Boston-based architect Miguel Rosales was the lead architect/urban designer and facilitated community participation during the design process. Neither Hsu nor Rosales served as the designer of record for the project. The engineer of record is HNTB/FIGG. The lead designers were Theodore Zoli (from HNTB) and W. Denney Pate (from FIGG). The bridge follows a new design in which two outer lanes are cantilevered outside of the wires another eight lanes run through the towers. It has a striking, graceful appearance that is meant to echo the tower of the Bunker Hill Monument, which is within view of the bridge, and the white cables evoke imagery of the rigging of the USS Constitution.
The MBTA Orange Line tunnel lies beneath the bridge.
Read more about this topic: Leonard P. Zakim Bunker Hill Memorial Bridge
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