This bridge is a good example of a deck cantilever truss bridge. A wide structure, it is configured as two superstructures (each having two truss lines) sitting directly beside each other on a single shared substructure. To see how this is the case, stand directly under the bridge and look up, to see not only four truss lines, but a tiny gap between each superstructure's deck.
The bridge includes a 236.5 foot suspended span. The suspended span follows a modified Warren truss configuration, while Pratt truss thinking is evident in the remaining truss system. The eastern end of the bridge has an approach system which includes an interesting "Y" detail to accommodate a ramp.
This bridge is a later example of deck cantilever truss bridge technology but thanks to widespread nationwide demolition of this bridge type, this bridge is increasingly rare and significant. Equally rare is the fact that PennDOT chose to extensively rehabilitate this bridge rather than demolish and replace the bridge. Its a nice change. There were however a number of alterations made. Numerous rivets were replaced with bolts. Additionally, the suspended span hanger and the tension anchorage bearings at the ends of the truss were both supplemented with an additional system.
While it is not known if they were the on-site contractor for this bridge, shop drawings for this bridge were prepared by the Pittsburgh - Des Moines Steel Company of Pittsburgh, Pennsylvania indicating the fabricator of the superstructure.
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