This is a small bridge that is seated on concrete abutments. Although there is paint remaining on the bridge, the structure is in poor condition, particularly under the deck. Some of the lateral bracing is falling off the bridge. Bridge like this one might not be the most historically significant of metal truss bridges, yet their small size makes preservation inexpensive. As such, restoring this bridge, located on a quiet paved road, is worthwhile.
Information and Findings From Ohio's Historic Bridge Inventory
The bridge carries a 2 lane road over a stream in a rural setting with scattered 20th century residences.
The 1 span, 54'-long, rivet-connected Warren pony truss bridge is traditionally composed of built-up members. It has lattice railings, concrete deck, and is supported on concrete abutments.
Summary of Significance
The 1920 Warren pony truss is a later example of its type/design with no distinguishing features. It has riveted connections, typical of Warren trusses from about 1900 to the 1940s when riveted connections began
to be phased out in favor of welded connections. The weld-connected Warren trusses continue to be a popular bridge type/design on county roads in Ohio. Warren trusses are the most common design found in Ohio and the nation. The Ohio
Phase 1A survey (2008) has identified more than 500 examples dating from 1897 to 1961, accounting for well over half of the approximately 800 pre-1961 metal trusses. The Warren design was particularly well suited to rigid (riveted,
and later welded connections), but not as well suited to pin connections; this helps to explain its popularity in the 20th century rather than the 19th century, although it is based on a British patent issued to engineers James
Warren and Willoughby Monzani in 1848. In the U.S., the popularity of the Warren truss coincided with improvements in pneumatic field riveting equipment starting about 1900. The Warren, which is based on a series of equilateral
triangles, is identified by its simplicity of design, ease of construction with equal-sized members, and ability of some diagonals to act in both tensions and compression. Warren trusses are often stiffened by the addition of
verticals; they can also have polygonal (sloped) upper chords to achieve greatest depth at midspan.
Bridge Considered Historic By Survey: No
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