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This was a very small three panel pin connected half-hip Pratt pony truss. It featured a wooden deck. An i-beam was added to one side of the deck, supposedly to add strength and support for the bridge. One would expect such an addition to include putting a beam on both sides. This bridge looked unusual with the beam on only one side.
The Historic Bridge Inventory as usual, thinks that small 19th century pin-connected pony trusses are not historic. While it is right in that truss bridges with distinctive details are more significant, a bridge like this, a classic and supposedly "common" pony truss does in fact represent the development of the truss bridge. After all, the bridges that are "common" represent the results of the development, a gradual standardization of bridge design. Furthermore, as this now-demolished bridge helps demonstrate, bridges of this type are no longer common because so many have been demolished.
Information and Findings From Pennsylvania's Historic Bridge InventoryDiscussion of Bridge The ca. 1895, pin connected, single span, 43'-long, Pratt pony truss bridge is supported on concrete filled, built up caissons. The traditionally composed trusses have no innovative or distinctive details. The upper chords and end posts are built up, the lower chords and diagonals are eye bars to facilitate the pinned field connections, and the verticals are laced angles. The fabricator and construction date are not documented in available records. The bridge is one of several nearly identical ca. 1895 pony truss bridges in the county. Sixteen pin connected Pratt pony truss bridges remain in the county with the earliest dating to 1889. It is the early examples and those with distinctive details that represent the significance and development of the technology. This bridge is not historically or technologically significant. Discussion of Surrounding Area The bridge carries 1 lane of an unimproved road over a stream in a sparsely developed, wooded setting. Bridge Considered Historic By Survey: No |
This historic bridge has been demolished. This map is shown for reference purposes only.
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