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In structural engineering, a Warren truss or equilateral truss [1] is a type of truss employing a weight-saving design based upon equilateral triangles. It is named after the British engineer James Warren, who patented it in 1848. Wills Creek Bollman Bridge, a short Warren truss bridge of 1871
James Warren (1806–1908) was a British engineer who, around 1848 to 1907 (along with Willoughby Monzoni), patented the Warren-style truss bridge and girder design. This bridge design is mainly constructed by equilateral triangles which can carry both tension and compression. The first suspension bridge to utilise a Warren truss in its design ...
Other truss designs were used during this time, including the camel-back. By the 1910s, many states developed standard plan truss bridges, including steel Warren pony truss bridges. In the 1920s and 1930s, Pennsylvania and several states continued to build steel truss bridges, using massive steel through-truss bridges for long spans.
The structure derives its name from engineer James Warren, who patented this innovative design in the mid-19th century. The Warren truss consists of straight members arranged in a series of equilateral triangles. This configuration allows for the efficient transfer of loads, making it suitable for both road and railway applications.
Senator Robert D. Fleming Bridge; Skunk River Bridge; Soo Line Railroad Bridge; South Dakota Department of Transportation Bridge No. 02-007-220; South Dakota Dept. of Transportation Bridge No. 56-090-096; South Omaha Veterans Memorial Bridge; Stark Street Bridge; Starke County Bridge No. 39; Starr Mill Road Bridge; Stone Sign Post Road Bridge ...
The Powers Highway-Battle Creek Bridge is a bridge that formerly carried Powers Highway over Battle Creek in Brookfield Township, Michigan. It was listed on the National Register of Historic Places in 2000. The bridge is a double-intersection Warren truss, a design noted for its extremely lightweight members and low cost.
Starke County Bridge No. 39 is a single span Warren Pony Truss structure. The bridge is located on the northern outskirts of the small town of Knox, Indiana, where Main and Water Streets terminate at the former Penn Central Railroad cut. The bridge spans the rail cut in a northwest–southeast direction, allowing access to Wythougan Park. [2]
The finished 1943–1960 bridge consists of thirteen steel Warren truss spans (with one of those being the 306-foot (93 m) vertical-lift chorded Warren truss main span) carried on twelve piers. [2] Total bridge length is 2,890 feet (880 m), including 441 feet (134 m) of concrete slab approach spans on the west end of the bridge.