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The Tappan Zee Bridge, the replacement for the original bridge, is a twin-deck cable-stayed bridge opened in 2017 and 2018, and is both the southernmost Hudson River-crossing bridge entirely within New York State, and the first cable-stayed bridge in North America to match Boston's Zakim Bridge (see below) overall road-deck width figure of 183 ...
View of diagonal stays and vertical suspender cables; the main cables are at top. The Brooklyn Bridge contains four main cables, which descend from the tops of the suspension towers and help support the deck. Two are located to the outside of the bridge's roadways, while two are in the median of the roadways. [7]
In an underspanned suspension bridge, also called under-deck cable-stayed bridge, [21] the main cables hang entirely below the bridge deck, but are still anchored into the ground in a similar way to the conventional type. Very few bridges of this nature have been built, as the deck is inherently less stable than when suspended below the cables.
The suspension bridge's architecture is better at handling the load in the middle of the bridge, while the cable stayed bridge is better suited to handle the load closest to the tower. Combining these two architectural engineering ideas into a hybrid has been done in Istanbul with the Yavuz Sultan Selim Bridge .
The deck is raised on posts above the main cables. Stressed ribbon bridge: a modern descendant of the simple suspension bridge. The deck lies on the main cables, but is stiff, not flexible. Suspension bridge (more precisely, suspended-deck suspension bridge): the most familiar type. Though technically all the types listed here are suspension ...
The American Bridge Company was selected to construct the cables and deck. [71]: 53 The cable-spinning process began in March 1963, and took six months, since 142,520 mi (229,360 km) of bridge cables had to be strung 104,432 times around the bridge. [97] [98] The main cables were hung on both sides of the span, and then suspender cables were ...
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The bridge is one of two installations of a new cable-stayed cradle system that eliminates anchorages in the pylon by carrying the stays from anchorages in the bridge deck, through the pylon and back to anchorages in the deck. [3] The cradle system provides many benefits during construction and over the 100+ year service life of the bridge.
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