Custom gantry places 97-ton County Materials bridge beams steps from traffic

Sources: Illinois State Toll Highway Authority, Downers Grove; Edward Kraemer & Sons Inc., Plain, Wis.; Concrete Products staff

A Jane Addams Memorial Tollway (Interstate 90) contractor has completed the first phase of prestressed concrete erection for the $95 million Fox River Bridge expansion—24 bulb tee girders, 90-in. deep, 150- to 168.5-ft. long—proving how a proprietary hoisting scheme can replace conventional crane picks without disrupting immediately adjacent highway traffic.

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