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Tappan Zee Bridge
Completion Date:

December 20, 1955


American Bridge was prime superstructure contractor for the 7,300 (2,225m) deep-water portion of this 16,000 (4,900m) crossing of the Hudson River above New York City. The three-span channel unit is a 2,415 (736m) cantilevered truss that was constructed by erecting the anchor (flanking) spans on falsework trusses and cantilevering the 1,212 (370m) mainspan from both directions. The 20 deck truss approach spans were constructed at an on-land yard facility and floated into place. Each span was about 250 long by 64 wide by 26 deep (76m by 20m by 8m), and weighed 830 tons (753mt).
 
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