Project Specs:
Bridge Type: Long Span multigirder
Steel Tonnage: 6,700 Tons
Steel Type: A709 Grade 50W and A709 Grade HPS 70W
Coating: Partially Coated

Project Team:
Project Owner: Pennsylvania Turnpike Commission
Contractor: Dick Corporation
Designer: Gannett Fleming, Inc.
Detailer: High Steel Steel Structures, Inc.
Steel Fabricator: High Steel Structures, Inc.
Steel Erector: Structural Services, Inc.

Description:
Part of a massive highway construction project in a mountainous region of western Pennsylvania and West Virginia, this 2,300-foot dual steel girder bridge was erected 50 feet over an active railroad trestle on the Wheeling and Lake Erie Railroad.  At 252 feet high, the spans are the tallest Pennsylvania Turnpike bridges in existence, and the third longest on the turnpike.

The bridge is a hybrid design and incorporates a new generation of High Performance Steel known as TMCP (thermo-mechanically controlled roll processing) into the girder flanges over the piers.  For this project, the strength of HPS allowed the designer to specify a lower weight structure, which yielded significant cost savings for the owner.

 

 

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