Longest Concrete Segmental Span in Pennsylvania, I-76 Allegheny River Bridge Near Pittsburgh

SEGMENTS, WINTER 2011, VOL. 56

The new I-76 Allegheny River Bridge (Fig. 13) opened to traffic on September 7, 2010. The bridge set a new record as the state’s longest concrete segmental span at 532'. Designed by FIGG and being built by Walsh, the new 2,350' twin structures will accomplish the Pennsylvania Turnpike Commission’s goals of a safer, more pleasing experience for customers. Long, open spans and balanced cantilever construction create an environment friendly bridge that preserves river habitats and archaeological areas below the bridge while also keeping river, rail, and vehicular traffic moving. Spans are 285' – 380' – 380' – 444' – 532' – 329'.

Project Details

Designer:

 

Owner:

Pennsylvania Turnpike Commission
 

Contractor:

Walsh Construction
 

Construction Engineer:

 

Construction Engineering Inspection:

McTish with FIGG
 

Form Travelers for Cast-in-Place Segments:

 

Post-Tensioning Materials:

 

Epoxy Supplier:

 

Prepackaged Grout: