This historic bridge was demolished and replaced in 2010!
It is unclear who thinks up for horrible names for roads. The
bridge itself is deserving of a name nicer than H50. This bridge is seated on
attractive stone abutments which are in fairly poor condition. The bridge itself
is in decent condition. There is v-lacing on the verticals, diagonals, and under
the top chord and end posts. Cambria stamps are present on the steel. Lattice
railings remain on the bridge. One of the unusual details of this Warren truss bridge is there is only a single vertical member on each truss, right in the center of the bridge. No other vertical members are present.
Information and Findings From Ohio's Historic Bridge
The bridge carries a 2 lane road over a stream in a rural area of active farms. There is a period farmhouse beyond one quadrant.
The 1 span, 37'-long, rivet-connected Warren pony truss bridge is traditionally composed of built-up members. It has lattice railings, concrete deck, and is supported on stone abutments.
Summary of Significance
The 1914 rivet-connected Warren pony truss bridge has no unusual or distinctive features, being a short-span example of the most common rivet-connected truss bridge type/design of the 20th century. 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.
Warren trusses were a standard design of the Ohio State Highway Department in the 1910s and 1920s, but they achieved their greatest
popularity with county engineers, who purchased the bridges from Ohio fabricators such as the Champion Bridge Co. and the Mt. Vernon Bridge Co. Fewer than 12 surviving rivet-connected Warren trusses date prior to 1910, and they
represent the period when the rivet-connected design solidified its position as the most popular prefabricated county truss design.
A noteworthy change in the technological development of Warren trusses was the transition
from riveted to welded connections that began in the mid to late 1930s. The development was based on improvements in arc-welding equipment and the propagation of welding techniques as a substitute for riveting in many fields of
construction, such as steel-hull ships and steel-frame buildings. While most of Ohio's remaining truss fabricators went out of business in the depression of the 1930s, Ohio Bridge Corporation (OBC) of Cambridge grew its business on
the development of a standard weld-connected Warren pony truss with polygonal upper chords in the years immediately following WWII. OBC remains in operation and many Ohio counties continue to find the weld-connected Warren trusses
to be a desirable economical alternative to other bridge types. More than 360 of the 500 Warren trusses in the study are weld-connected and most are attributable to OBC from the late 1940s to 1960. It is the early examples of
weld-connected Warren trusses dating from the mid 1930s to mid 1940s that are the technologically significant examples.
Original / Full Size Photos A collection of overview and detail photos. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
Mobile Optimized Photos A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
Maps and Links: CR-H50 Bridge
This historic bridge has been demolished. This map is shown for reference purposes only.