PRR Panhandle Bridge drone video

This bridge design, while utilizing trusses in its construction, is not known as a through truss. Basically, a through truss is supported at each structural end by piers.

The proper name for this design is Cantilever. Piers in the river positioned mid way under a beefed up truss structure provide a pivot point that helps the shore ends to support the extended central span. The counter balancing effect can be enhanced to support a suspended truss mid structure for even longer spans. They are the alternative to suspension bridges, better adapted for railroad weights and bridge stability.

Bruce