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Work on the first of two contracts rehabilitating the approach decks and related elements of New York's Verrazano Narrows Bridge is underway for the Triborough Bridge Tunnel Authority. The project's design and materials specifications were influenced by the authority's objective of achieving a 20-year life from the rehabilitated deck slabs.
The tests indicated that the deterioration was caused by chloride exposure over the 30 years the decks have been in service. The staged work is being done behind concrete barriers, closing one lane in each direction. Work must be shut down for the annual running of the New York City Marathon in the fall.
The Brooklyn approach ramps include 13 structures with a total deck area of 637,170 square feet. The Staten Island side has a combined deck area of 154,590 square feet. Some 150,000 square feet of the...