In general, half-hip Pratt pony truss bridges tend to be smaller, while full-slope Pratt pony trusses are larger. This half-hip pony truss, with a length exceeding 80 feet, would be long for a full-slope pin-connected pony truss. Pin-connected pony trusses are usually under 80 feet in length. As a result of its span length, the trusses of this bridge are quite deep, and the top chord and end posts are fairly massive. The bridge retains original lattice railings. V-lacing is present on the vertical members and under the top chord and end posts. Cambria steel stampings were found as well as Eastern steel stamps. The bridge also retains a jack-arch deck, a type of deck common during the time this bridge was built but of which few examples remain today. A jack-arch deck consists of what looks like half of a corrugated steel culvert spanning each deck stringer. The concrete was poured on top of the corrugated steel as well as the deck beams to form the deck and riding surface. It is likely that few of these decks survive because the corrugated steel would rust and fall out, and the concrete would start breaking up afterward. Plus, decks are a common thing to replace on a bridge, as they tend to wear out quickly. Since the materials used to make a jack arch deck are still around, it would be interesting to see this bridge rehabilitated, with a new jack arch deck.
This bridge was noted to have both Cambria and Eastern brands on its steel.
Information and Findings From Ohio's Historic Bridge Inventory
The bridge carries a 2 lane road over a stream in a sparsely developed, rural setting.
The 1 span, 91'-long, pin-connected Pratt pony truss bridge is traditionally composed of built-up compression members and eyebar tension members. It has lattice railings and a concrete jack arch deck.
Summary of Significance
The 1913 pin-connected Pratt pony truss bridge is a late example of a bridge type/design in use from the 1880s to 1910s, but it is among the earlier surviving examples of jack arch decks. Jack arch decks were in
use from about 1905 to the 1930s. It was recommended as select in the first inventory, but the it is an example of a standard design and has no innovative or distinctive details. Jack arch decks were used for bridges and for
building flooring systems (first in bridge and then in concrete) since the late 19th century. In comparison with the population of metal truss bridges in Ohio, this example is not historically or technologically significant. It does
not stand out in the statewide or even regional population. There are 94 earlier examples. The bridge is recommended as not eligible.
Bridge Considered Historic By Survey: No
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