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The Warren Truss is a structural system commonly used as bridge structure. But what are its different members, and how does it work? Learn more in this article.
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
The Warren Truss is a very common design for both real and model bridges. It’s exact history and origination is a little muddled, however. James Warren patented a design in 1848 (in England), which many attribute the name “Warren Truss”.
The Warren truss bridge design includes an interior railing that is connected to the diagonal span, preventing people from falling off the edge of the bridge. The truss makes use of Newton’s principles of motion, particularly statics, which is a key aspect of the laws.
Bridge historians and early textbooks generally call a truss with alternating compression and tension diagonals a Warren; however, sometimes it is called an equilateral truss since all panel lengths and diagonals are of equal length creating a series of equilateral triangles.
This lesson and its associated activity will focus on four truss bridges: the Warren, the Warren with verticals, the Pratt, and the Howe (Figure 6). Warren Truss. A design distinguished by equal-sized components and the ability of some of the diagonals to act in both tension and compression.
The Warren truss is perhaps the most common truss for both simple and continuous trusses. For smaller spans, no vertical members are used lending the structure a simple look. For longer spans vertical members are added providing extra strength. Warren trusses are typically used in spans of between 50-100m. Truss Bridges