ORANGETOWN, N.Y. -- Construction for the Tappan Zee Bridge's main span towers is now under way.
Tappan Zee Constructors installed four pre-assembled sections of steel weighing 340,000 pounds each on top of the main span crossbeams in June.
The segments will enable the TZC team to build out from the towers one section at a time and attach stay cables to the structure along the way this summer.
The erected steel sections will receive precast concrete deck panels to provide a base driving surface.
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