page_title: Truss bridge
section_title: Whipple truss
hierarchical_section_title: Truss bridge / Truss types used in bridges / Whipple truss
caption_attribution_description: English: Bridge L-158, built by the New York Central railroad in 1883 at Rondout Creek near Kingston. Moved to its current location at Muscoot Reservoir between Somers and North Salem in 1904, to be taken out of service in 1960, it is listed on the National Register of Historic Places as the only remaining double-intersection Whipple truss railroad bridge in New York State.
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 Whipple truss, named after its inventor Squire Whipple, is usually considered a subclass of the Pratt truss because the diagonal members are designed to work in tension. The main characteristic of a Whipple truss is that the tension members are elongated, usually thin, and at a shallow angle, and cross two or more bays (rectangular sections defined by the vertical members).
caption: Bridge L-158, a double-intersection Whipple rail truss over the Muscoot Reservoir in Golden's Bridge, New York
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