page_title: Truss bridge
section_title: Parker (camelback) truss
hierarchical_section_title: Truss bridge / Truss types used in bridges / Parker (camelback) truss
caption_attribution_description: Woolsey Bridge in Washington County, Arkansas. This bridge is on the National Register of Historic Places, built in 1925. This image is taken facing southeast.
context_page_description: A truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements usually forming triangular units. The connected elements may be stressed from tension, compression, or sometimes both in response to dynamic loads. The basic types of truss bridges shown in this article have simple designs which could be easily analyzed by 19th and early 20th-century engineers. A truss bridge is economical to construct because it uses materials efficiently.
context_section_description: A Parker truss bridge is a Pratt truss design with a polygonal upper chord. A "camelback" is a subset of the Parker type, where the upper chord consists of exactly five segments. An example of a Parker truss is the Traffic Bridge in Saskatoon, Canada. An example of a camelback truss is the Woolsey Bridge near Woolsey, Arkansas.
caption: The Woolsey Bridge is an example of a Parker camelback truss
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