Saturday, 10 August 2013

Sunshine Skyway Bridge

Sunshine Skyway Bridge is a 6.7km-long  bridge built over Tampa Bay, Florida, US. It is considered to be the longest cable stayed concrete bridge in the world, while the Travel Channel rated the bridge as one of the top 10 in the world.

Construction of the current bridge began in 1982, and the completed bridge was dedicated on February 7, 1987.

United States Postal Service have issued one stamp series feature Sunshine Skyway Bridge on February 28, 2012.

Image courtesy of Robert Neff.

To protect the bridge, concrete dolphins have been built around the piers.

The bridge has a vertical clearance of 193ft and consists of a substructure, a 1,200ft main span , two low level approach spans and two high level approach spans.



The main span consists of two towers located in the center of the bridge, which is supported by 42 continuous stay cables with 21 located on either side, sheathed in 9in diameter steel pipes. The 40ft-wide roadway on the main span is made of over 300 precast concrete segments.

Image courtesy of Joe King.

The high level approach spans, made of 584 post-tensioned segmental box girder segments totaling 18 spans, have a total length of 5,000ft and are located on either side of the bridge.

The low level twin trestles have a total length of 13,000ft and are made of 100ft spans of precast pre-stressed girders. A total of 256 spans with five girders form the low level trestles. (Road-traffic







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