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.
The Huey P. Long Bridge, located in Jefferson Parish, Louisiana, is a cantilevered steel through-truss bridge that carries a two-track railroad line over the Mississippi River at mile 106.1, with three lanes of US 90 on each side of the central tracks. It is several kilometers upriver from the city of New Orleans. The East Bank entrance is at Elmwood, Louisiana, and the West Bank at Bridge City.
The Roberto Clemente Bridge, also known as the Sixth Street Bridge, spans the Allegheny River in downtown Pittsburgh, Pennsylvania, United States.
The Coraopolis Bridge is a girder bridge over the back channel of the Ohio River connecting Grand Avenue on Neville Island to Ferree Street in Coraopolis, Pennsylvania. It opened in 1995 to replace a structure of historic significance. The original Pratt/Bowstring/Pennsylvania through truss spans, designed by Theodore Cooper, were formerly the (third) Sixth Street Bridge, spanning the Allegheny River, in downtown Pittsburgh, and were built in 1892 by the Union Bridge Company. They were floated downstream by the Foundation Company in 1927 rather than being demolished when the bridge was removed to enable construction of the present (fourth) Three Sisters (Pittsburgh) Sixth Street Self-anchored suspension bridge. However, by the late 1980s, the old bridge could no longer support traffic volumes and was replaced by a newer structure.
The Frisco Bridge, previously known as the Memphis Bridge, is a cantilevered through truss bridge carrying a rail line across the Mississippi River between West Memphis, Arkansas, and Memphis, Tennessee.
The Philadelphia & Reading Railroad Bridge carries Norfolk Southern rail lines across the Susquehanna River between Cumberland County, Pennsylvania and Harrisburg, Pennsylvania. Some of its concrete piers encase stone masonry piers from an earlier truss bridge on this site, completed in 1891 by the Philadelphia, Harrisburg and Pittsburgh Railroad, which was then acquired by the Philadelphia and Reading Railroad to connect its Harrisburg and Lurgan lines. The current structure was constructed from 1920 to 1924 by replacing the trusses with concrete arches one track at a time. The bridge has fifty-one concrete arches, three more than the nearby Rockville Bridge.
The High Bridge is a railroad bridge crossing the Kentucky River Palisades, that rises approximately 275 feet from the river below and connects Jessamine and Mercer counties in Kentucky. Formally dedicated in 1879, it is the first cantilever bridge constructed in the United States. It has a three-span continuous under-deck truss used by Norfolk Southern Railway to carry trains between Lexington and Danville. It has been designated as a National Historic Civil Engineering Landmark.
The Union Pacific Missouri River Bridge is a rail truss bridge across the Missouri River between Council Bluffs, Iowa, and Omaha, Nebraska.
The Bellefontaine Bridge is a four-span truss railroad bridge over the Missouri River between St. Charles County, Missouri, and St. Louis County, Missouri. It has four 440-foot (130 m) spans. Construction started on July 4, 1892, and the bridge opened on December 27, 1893.
The Hermann Bridge was a cantilevered truss bridge over the Missouri River at Hermann, Missouri, between Gasconade County, Missouri, and Montgomery County, Missouri. The bridge formerly carried Route 19 traffic and was closed on July 23, 2007, when the Christopher S. Bond Bridge was opened to traffic.
B & O Railroad Viaduct is a historic structure in Bellaire, Ohio, listed in the National Register of Historic Places on June 22, 1976.
The Riverside Avenue Bridge is the only cast-iron bridge in Connecticut and one of a small number still in use in the United States. It carries Riverside Avenue over the New Haven Line railroad tracks in the Riverside section of Greenwich, Connecticut. The bridge was part of an earlier span built in 1871 over the Housatonic River by the New York and New Haven Railroad, and when that bridge was replaced, part of it was erected in Riverside in 1895. It was placed on the National Register of Historic Places in 1977.
The Ellsworth Street Bridge is a highway bridge that crosses the Willamette River in Albany, Oregon, United States. Built in 1925, the two-lane structure carries U.S. Route 20 eastbound traffic, with the adjacent Lyon Street Bridge carrying westbound traffic. The 1,090-foot (330 m)-long steel-truss bridge was designed by Conde McCullough and opened in 1926.
The B & O Railroad Potomac River Crossing is a 15-acre (6.1 ha) historic site where a set of railroad bridges, originally built by the Baltimore and Ohio Railroad, span the Potomac River between Sandy Hook, Maryland, and Harpers Ferry, West Virginia, in the United States. The site was added to the National Register of Historic Places on February 14, 1978 for its significance in commerce, engineering, industry, invention, and transportation.
The Hill to Hill Bridge is a road crossing of the Lehigh River and linking the south and north sides of Bethlehem, Pennsylvania in the Lehigh Valley region of the United States.
The Healdsburg Memorial Bridge is a steel truss bridge across the Russian River in Healdsburg, California, listed in the National Register of Historic Places. It can be seen from nearby U.S. Route 101 and is "Healdsburg's abiding structural symbol".
The Jefferson Street Viaduct is an historic structure located in Ottumwa, Iowa, United States. The riveted Warren deck truss bridge was completed in 1936. It was listed on the National Register of Historic Places in 1998 as a part of the Highway Bridges of Iowa MPS.
The Quechee Gorge Bridge is a historic bridge, carrying U.S. Route 4 (US 4) across Quechee Gorge, near the Quechee village of Hartford, Vermont. Built in 1911, it is Vermont's oldest surviving steel arch bridge. It was listed on the National Register of Historic Places in 1990.
The Fink truss is a commonly used truss in residential homes and bridge architecture. It originated as a bridge truss although its current use in bridges is rare.
The Morley Bridge, also known as the Romley Bridge, located near Romlee in Chaffee County, Colorado, is a wrought-iron pin-connected Pratt truss bridge that was built in 1881. It was listed on the National Register of Historic Places in 2003.
