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This bridge is an early surviving example of a highway truss bridge with riveted connections. It documents the fact that local bridge builder John Denithorne and Son, of whom a number of pre-1900 pin-connected truss bridges survive as well, followed the national trend and transitioned into riveted connections in the 20th Century. The use of u-bolt hangers for the floorbeams, common in pin-connected bridges but rare in rivet-connected truss bridges, shows a lingering in pre-1900 construction methods.
Information and Findings From Pennsylvania's Historic Bridge InventoryDiscussion of Bridge The one-span, 88'-long, rivet-connected steel Warren pony truss bridge was built by John Denithorne & Son in 1905. It has standard built-up members, lattice railings, and is supported on stone abutments. U-shaped floorbeam hangers pick up rolled floorbeams and pass over saddles at the lower chord connections. The floorbeams support steel stringers and a laminated timber deck placed in 1985. Fieldstone wingwalls with parapets enclose the approach roadways. It is representative of the transition period from 1895 to 1910 when riveted connections replaced pinned connections as the dominant type of metal truss bridge connection. U-shaped floorbeam hangers, a detail most often associated with pin connected bridges, are an important transition detail. Riveted truss bridges with U-shaped floorbeam hangers are not common. It is a significant example of its type and design. Discussion of Surrounding Area The bridge carries a 2 lane road over a stream in a rural setting with woods and scattered 19th to late-20th-century residences. Bertolet School Road dead ends south of the bridge. On the north side of the bridge is Camp Sankanac, a recreation center incorporating elements of an earlier mill. The 19th-century stone mill building and residence have been converted to offices and a community building. At the bridge's northeast quadrant is a swimming pool. Bridge Considered Historic By Survey: Yes |
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