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Additional Information: This bridge was an AISC Medium Span Prize Bridge.
While this is a late example of a riveted cantilever truss bridge, and may tend to be overshadowed by Pittsburgh's immense collection of historic bridges, this bridge nevertheless exhibits some interesting and unusual details. The main spans of this bridge are a cantilever deck truss system. The system consists of 225 foot anchor arm spans, and a 400 foot central span consisting of 100 foot cantilever arms and a 200 foot suspended span. The overall form of this truss is unusual for a deck truss. The top chord is not horizontal and instead overall follows a 3.5% profile grade, giving the top a slight arched appearance. The center truss span has a polygonal (arch-like) bottom chord, which is not uncommon for a cantilever (or continuous) deck truss, but what is unusual is that the "arch" shape is very shallow.
The approach span system of this bridge at the northern end is also of interest. It consists of deck plate girder spans configured as two parallel superstructures sharing a common deck/roadway and pier system. These girder spans are also configured as cantilever spans that include suspended spans.
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