NC Department of Transportation
McNary Bergeron designed the advancing rail system along with the lead trestle template and the crane platforms. Working with Flatiron and DEAL, the details of the rail system were coordinated to accommodate the specialized equipment used on the trestle - platform bogies, rail cars, straddle gantries, and pile trippers.
Total Contract Value
Construction Method and Specifications
Due to the shallow water depth in the bay, conventional barge mounted cranes were not feasible. Instead, an advancing rail system was designed to straddle the permanent bridge footprint. It was used in a leap-frog fashion with all construction activities occurring within the 1600-foot trestle area similar to an assembly line. Two headings (north and south) were used to meet the project completion date.