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PBES Innovative Projects

Governor Malcolm E. Wilson Tappan Zee Bridge (Tappan Zee Bridge)
Location	Hudson River, about 13 miles north of New York City
State	NY
Contact Person	Thruway Authority Public Affairs Office New York State Department of Transportation Administrative Headquarters 200 Southern Blvd. P.O. Box 189 Albany NY 12201-0189 Phone: (518) 436-2700 (Interchange 23)
Description	The 16,000-foot Tappan Zee Bridge carries approximately 130,000 vehicles per day over the Hudson River on the New York State Thruway system. Because it is a critical route for commuters, the New York State Thruway Authority requires that work projects keep all lanes of traffic open for morning and evening rush hour traffic. In 1998, a necessary redecking project for the east deck truss spans began replacement of more than 250,000 square feet of deck in nighttime work, opening all seven lanes to traffic by 6 AM. The project used proprietary full-depth deck panels, 7 ½ in. thick overall. 1200 exodermic panels were required, typically 24 ft. x 12 ft. or 18 ft. x 12 ft. and weighing 18,000-13,000 lbs.
Photo
Prefabricated Elements	Decks
Other Keywords	Exodermic deck panels,full-depth deck panels
Advantages	Minimized traffic disruption: Exodermic deck panels allowed rapid placement of the panels, which provide the durability of reinforced concrete but weigh 35-50% less.

This page last modified on 05/12/08