by Michael Dillon P.E., MBA, Allegheny County Department of Public Works, Pittsburgh, Pennsylvania.

Webinar Documents

• ABC Replacement of a Bridge over Thanksgiving Weekend in Allegheny County, Pennsylvania - pdf of presentation
• News - May 9, 2013 - pdf of presentation

This project required the superstructure replacement of a bridge over four days in November 2012. The bridge was the only access to five businesses. The business owners agreed to shut down operations over Thanksgiving. This allowed Allegheny County to replace the existing adjacent box structure with a prefabricated steel structure with a grid deck. Other precast elements were used such as backwalls, moment slabs, and abutment caps. The presentation discussed why ABC was selected for this project and described the project from planning through construction, including costs and lessons learned.