This bridge is an example of a railing height truss bascule bridge. The railing height design refers to a deck truss whose trusses are raised up slightly above the deck like a pony truss, but just high enough so that the top chord of the truss acts like a railing. The design was developed in Chicago and was popular in that city both for a number of reasons. It offered a streamlined aesthetic, yet also had a utilitarian purpose of giving the top chord of the trusses a dual function as railings. It also increased the clearance under the bridge when lowered, while still avoiding the use of a full height pony truss. This is an unusual example of this truss type outside of Chicago. This California example is unusual because its truss and the roadway both have a very notable camber to them.
This bridge was designed by Edward Von Geldern who was one of the first registered engineers in Sutter County.
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CarCam: Northbound Crossing
Full Motion Video
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