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.
19th Street Bridge is a two-span through Pratt truss road bridge in Denver, Colorado, over the South Platte River, now used for pedestrians. It was built in 1888 to replace a wooden structure and carried automobile traffic until 1986. The bridge is listed on the National Register of Historic Places.
The ERT Bridge over Blacks Fork near Fort Bridger, Wyoming, was listed on the National Register of Historic Places in 1985 as part of a thematic study on early 20th century steel truss bridges in Wyoming. The ERT Bridge is a Warren pony truss bridge spanning 80 feet (24 m) with a width of 15.75 feet (4.80 m). Set on concrete abutments, the ERT Bridge was built around 1920 by Uinta County. It is an example of a transitional design from locally built bridges to standardized State designs
The DXN Bridge over the Little Missouri River is one of a group of thirty-one bridges in Wyoming that were collectively listed on the National Register of Historic Places as excellent examples of steel truss bridges of the early 20th century. The DXN Bridge is located in Crook County, Wyoming. It is a single-span of about 72 feet (22 m), an 8-bay Pratt pony truss on Crook County Road 18-200. It was built about 1920. The bridge is unique in lacking inclined end posts.
The North Fork Bridge carries Arkansas Highway 5 over the North Fork River, or the North Fork of the White River, in Norfork, Arkansas, United States. It is a modern steel girder bridge, replacing a 1937 Warren deck truss bridge, which was the first road crossing of the North Fork River in Norfork. The 1937 bridge, demolished in 2014, was listed on the U.S. National Register of Historic Places in 1990, but was delisted in 2015.
The EDZ Irigary Bridge is a historic Pennsylvania truss bridge in southeastern Johnson County, Wyoming. The bridge was built in 1913 at Sussex, Wyoming, and moved in 1963 to Irigary Road. The bridge was listed on the National Register of Historic Places in 1985 as part of a Multiple Property Submission devoted to historic bridges in Wyoming.
The EDL Peloux Bridge near Buffalo, Wyoming, is a Pratt pony truss bridge that was built in 1912 by the Canton Bridge Company. The bridge carries Johnson County Road CN16-40 across Clear Creek. The single-span bridge is 81.5 feet (24.8 m) long and has a wooden roadway supported by steel pins and piles. The bridge was placed on the National Register of Historic Places in 1985 as part of a Multiple Property Submission devoted to historic bridges in Wyoming The bridge was relocated to Buffalo City Park in 1986.
The EAU Arvada Bridge was a Parker through truss bridge located near Arvada, Wyoming, which carried Sheridan County Road CN3-38 across the Powder River. The bridge was built in 1917 by the Monarch Engineering Company of Denver. The single-span 8-panel bridge was 162 feet (49 m) long and was connected by steel pins. When nominated to the National Register of Historic Places in 1982, it was one of only two Parker through truss bridges remaining in Wyoming.
The CKW Bridge over Powder River is a Pratt deck truss bridge near Arvada, Wyoming, which carries US 14/US 16 across the Powder River. The bridge was built from 1932 to 1933 by the W. P. Roscoe Company. The 452-foot (138 m) bridge has three continuous main spans and two shallow approach spans. It is the only continuous truss bridge still in use on a Wyoming road and one of only two deck truss bridges built on a major highway.
The EBF Bridge over Powder River is a bridge located near Leiter, Wyoming, which carries Sheridan County Road CN3-269 over the Powder River. The 201.5-foot-long (61.4 m) bridge has two spans: the first span is a Pratt through truss, while the second span is a Warren truss. Due to this configuration, the bridge has been called "one of [Wyoming's] more interesting vehicular trusses." The trusses in the bridge are connected rigidly rather than by pins; the bridge was built in a transitional period between the two designs and is an early example of rigid connections. The Gregg & Stout Bridge Company of Sheridan built the bridge in 1915.
The ENP Bridge over Green River is a historic bridge located near Daniel, Wyoming, which carries Sublette County Road CN23-145 across the Green River. The Western Bridge and Construction Company built the bridge circa 1905. The 221-foot-11-inch (67.64 m) bridge has two spans, both Pratt trusses; the longer span is a Pratt through truss, while the shorter is a Pratt pony truss. The use of both through and pony trusses in the same bridge was uncommon in Wyoming, and the bridge is the only surviving example of a Pratt truss bridge in this style.
The ETD Bridge over Green River is a steel girder bridge near Fontenelle, Wyoming, which carries Sweetwater County Road CN4-8SS over the Green River. The bridge is a replacement for a historic Pratt through truss bridge built in 1913 by the Colorado Bridge and Construction Company. The 150-foot-long (46 m) bridge was one of the longest Pratt through truss bridges built in the early stages of Wyoming bridge construction.
The ETR Big Island Bridge is a Pratt through truss bridge located near Green River, Wyoming, which carries Sweetwater County Road CN4-4 across the Green River. The bridge was built from 1909 to 1910 by contractor Charles G. Sheely. It was named the Big Island Bridge after the Big Island region of Wyoming, which the bridge connected to other parts of the state. The 352-foot (107 m), two-span bridge is one of the older Pratt through truss bridges in Wyoming, and its spans, each 155 feet (47 m) long, are some of the longest on bridges of this design in the state.
The BMU Bridge over Wind River is a Parker through truss bridge located near Ethete, Wyoming, that carries Wyoming Highway 132 across the Wind River. The bridge was built circa 1935 as one of seven Parker truss bridges commissioned by the Wyoming Highway Department. It was moved to its current location in 1953–54. At 283 feet (86 m) long, the bridge is the longest single-span truss bridge still used in Wyoming.
The DDZ Bridge over New Fork River is a Kingpost pony truss bridge located near Boulder, Wyoming, which carries Sublette County Road 136 across the New Fork River. The bridge was built in 1917 by Lincoln County's government, as Sublette County had not yet been formed. Unlike most truss bridges at the time, the bridge was built with timber trusses rather than steel; it is the only wooden two-span Kingpost truss bridge remaining in Wyoming. The bridge's construction is considered to be "the most sophisticated" of extant wooden truss bridges in the state.
The DFU Elk Mountain Bridge was a Warren pony truss bridge located near Elk Mountain, Wyoming, which carried Carbon County Road 120-1 over the Medicine Bow River. The bridge was built in 1823 by contractor D. B. Miller. While the bridge's design is mainly a Warren truss, the top chord of the bridge is reminiscent of a Parker truss. At 102 feet (31 m) long, the bridge is the longest of its design in the Wyoming county highway system.
The DOE Bridge over Laramie River was a Pratt half-hip pony truss bridge located near Bosler, Wyoming, which carried Albany County Road CNA-740 across the Laramie River. The bridge was built in 1926 by contractor N. A. Swenson; it was originally part of the Lincoln Highway. In 1932, the bridge was replaced and moved to its current location. It was the last two-span Pratt half-hip truss bridge remaining in Wyoming.
The EWZ Bridge over East Channel of Laramie River is a Pratt pony truss bridge that was located near Wheatland, Wyoming, which carried Platte County Road CN8-204 over the East Channel of the Laramie River. The bridge was built from 1913 to 1914 by the Pueblo Bridge Company. The single-span bridge was 71 feet 2 inches (21.69 m) long. The bridge's five-panel Pratt pony truss design with steel pin connections was used fairly frequently in Wyoming highway bridges, and the bridge was one of the older examples of the style.
The Allentown Bridge is a bridge spanning the Puerco River near Houck, Arizona, located in Apache County. The existing structure was completed in 1923 and is listed on the National Register of Historic Places.
The Scenic Bridge crossing Clark Fork River about 4 miles (6.4 km) east of Tarkio in Mineral County, Montana, was built in 1928. It is located at Milepost 0 on Old U.S. Route 10 West. The bridge has also been denoted 24MN304 and MDT No. L31012000+08. It was listed on the National Register of Historic Places in 2010.
