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 Republican River Pegram Truss is a bridge located near Concordia, Kansas that is listed on the National Register of Historic Places. It is a three-span through truss bridge over the Republican River on route 795, northeast of Concordia. The bridge was built in 1893 by the Edge Moor Bridge Works of Wilmington, Delaware.
The Union Street Railroad Bridge is a vertical lift, Pratt through truss bridge that spans the Willamette River in Salem, Oregon, United States, built in 1912–13. It was last used by trains in the early 1990s and was sold for one dollar in 2003 to the City of Salem, which converted it to bicycle and pedestrian use in 2008–2009. It was added to the National Register of Historic Places in 2006.
The Cold Springs Bridge is a 208-foot, single span Pegram truss bridge in Blaine County, Idaho. It is 17 feet (5.2 m) wide. It provides 21 feet (6.4 m) clearance above a roadbed below.
The Gimlet Bridge is a 217-foot, single span Pegram truss railroad bridge in Blaine County, Idaho. It is 17 feet (5.2 m) and is supported by concrete piers at each end. It provides 21 feet (6.4 m) clearance above a roadbed below.
The Housatonic River Railroad Bridge is a historic bridge carrying Metro-North Railroad's New Haven Line trackage across the lower Housatonic River in the U.S. state of Connecticut. The bridge is also used by Amtrak for its Northeast Corridor services. It was listed on the National Register of Historic Places in 1987, which also refers to the bridge as the Devon Bridge. It is also referred to as the Devon Railroad Bridge by the state Department of Environmental Protection.
The Amtrak Old Saybrook – Old Lyme Bridge is the last crossing of the Connecticut River before it reaches Long Island Sound. It is a Truss bridge with a bascule span, allowing boat traffic to go through. Its tracks are owned by Amtrak and used by Northeast Regional, Acela Express, Shore Line East trains traversing the Northeast Corridor. It can be seen from the Raymond E. Baldwin Bridge, as well as from various points on Route 154.
The Jackson Branch Bridge No. 15, also known as the Tecumseh Railroad Bridge due to its close proximity to the city of Tecumseh, is a historic railway deck truss bridge that spans the River Raisin in rural Raisin Charter Township in Lenawee County, Michigan. The bridge was added to the National Register of Historic Places on December 4, 2001.
The Mianus River Railroad Bridge, also known as the Cos Cob Bridge, is a bascule bridge built in 1904 over the Mianus River, in Greenwich, Connecticut. It was listed on the National Register of Historic Places in 1987. The bridge carries the Northeast Corridor, the busiest rail line in the United States, both in terms of ridership and service frequency. It is operated by the Metro-North Railroad, successor to Conrail, Penn Central, and the New York, New Haven and Hartford Railroad, which erected it, and is owned by the Connecticut Department of Transportation.
George Herndon Pegram, most commonly known as George H. Pegram, was an engineer who patented the Pegram truss.
The Ririe A Pegram Truss Railroad Bridge is a Pegram truss railroad bridge which crosses the Snake River 3 miles (4.8 km) north of Ririe, Idaho. The bridge, which carries a one-track section of the East Belt Branch, consists of two truss spans and is 420 feet (130 m) long by 18 feet (5.5 m) wide. The bridge was originally constructed for a crossing in Nyssa, Oregon in 1894 for the Union Pacific Railroad and was relocated to its current site in 1914, where it carried Oregon Short Line Railroad tracks. The bridge's Pegram truss design was the work of George H. Pegram, the chief engineer for Union Pacific; as Pegram held a patent on the design, all surviving Pegram truss bridges were commissioned during Pegram's tenure with the Union Pacific and Missouri Pacific railroads.
The Ririe B Pegram Truss Railroad Bridge is a Pegram truss railroad bridge which crosses the flood channel of the Snake River north of Ririe, Idaho. The single-span bridge, which carries a single track of the East Belt Branch, is 210 feet (64 m) long and 18 feet (5.5 m) wide. The bridge was originally constructed for a Union Pacific Railroad crossing in Nyssa, Oregon in 1894 and was relocated to its current site in 1914, where it carried Oregon Short Line Railroad tracks. The bridge's Pegram truss design was the work of George H. Pegram, the chief engineer for Union Pacific; as Pegram held a patent on the design, all surviving Pegram truss bridges were commissioned during Pegram's tenure with the Union Pacific and Missouri Pacific railroads.
The Hillsborough Railroad Bridge was a historic covered railroad bridge spanning the Contoocook River in Hillsborough, New Hampshire. Built in 1903 by the Boston and Maine Railroad, it was destroyed by arson in 1985. The bridge was listed on the National Register of Historic Places in 1975. At the time of its nomination it was one of six covered railroad bridges in the state; it and at least one other were destroyed by the actions of arsonists.
The Fisher Covered Railroad Bridge is a covered bridge in Wolcott, Vermont. Built in 1908, it originally carried the St. Johnsbury and Lamoille County Railroad over the Lamoille River. Now closed, it was the last covered bridge in Vermont to carry railroad traffic, and is a rare surviving example in the state of a double Town lattice truss. It was listed on the National Register of Historic Places in 1974.
The East Shoreham Covered Railroad Bridge is a historic covered bridge spanning the Lemon Fair River near East Shoreham, Vermont. Built in 1897 by the Rutland Railroad Company, it is the state's only surviving example of a wooden Howe truss railroad bridge. It was listed on the National Register of Historic Places in 1974.
The Railroad Street Bridge is a historic Pratt through truss bridge, carrying Railroad Street across the Lamoille River in Johnson, Vermont. It was built in 1928, after the state's devastating 1927 floods, and is one of its few surviving Pratt through truss bridges. It was listed on the National Register of Historic Places in 2007 as Bridge 6.
The West Milton Bridge is a steel girder bridge carrying Bear Trap Road across the Lamoille River in Milton, Vermont. It was built as a replacement for a 1902 Pennsylvania truss bridge, which was relocated to the site of the Swanton Covered Railroad Bridge, and is listed on the National Register of Historic Places.
Grace Pegram Truss Railroad Bridge is a Pegram through truss bridge over the Bear River near Grace, Idaho. It was originally built in 1894 and was moved to its current location by the Union Pacific in 1913.
The Ninth Street Bridge in Boise, Idaho, also known as the Eighth Street Bridge, crosses the Boise River and is a 2-span, pin-connected Pratt through truss design constructed by the Missouri Valley Bridge & Iron Co. and completed in 1911. Each span is 160 ft (49 m) and includes six full panels and two end panels, supported by concrete piers at each end and midway in the river. Laced channel sections with cover plates form the upper chords, with eyebars on the lower chords. Eyebars with turnbuckles form the diagonals. The bridge was added to the National Register of Historic Places in 2001.
The Conant Creek Pegram Truss Railroad Bridge, in Fremont County, Idaho near Grainville, Idaho and Ashton, Idaho, was built in 1894. It brought a railroad over the Conant Creek, 1 mile south of the junction of Squirrel Rd. and the old Ashton-Victor railroad spur tracks. It is a Pegram truss bridge, designed by George H. Pegram. It was listed on the National Register of Historic Places in 1997.
