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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.
Pages in category "Pratt truss bridges in the United States" The following 200 pages are in this category, out of approximately 281 total. This list may not reflect recent changes .
The only maintenance a Howe truss requires is adjustment of the nuts on the vertical posts to equalize strain. [1] The diagonals in a wooden Pratt truss proved difficult to keep in proper adjustment, so the Howe truss became the preferred design for a wooden bridge [1] or for a "transitional" bridge of wood with iron verticals. [2]
Only a few single-lane Pratt truss bridges remain in California today. The Hansen Bridge is closely tied to the community planning and development of Downieville in Sierra County, particularly in its role following the 1937 Downieville flood. It serves as a notable example of the truss bridge design. Its period of significance spans from 1935 ...
Chinworth Bridge is an example of a Pratt through-truss bridge. Patented in 1844 Caleb and Thomas Pratt, the truss has vertical elements acting in compression and diagonal components acting in tension. A pin-connected Pratt through truss is "representative of perhaps the most common type of early-20th century truss bridges." [2] [3]
Lombard Street Bridge is a historic truss bridge located at Baltimore, Maryland, United States.It is an 88-foot cast iron span consisting of three lines of trusses—two outer trusses of composite cast and wrought iron in a diagonal Pratt design and a center composite bowstring truss of Pratt-system web.
Pratt truss bridges in the United States (281 P) B. Baltimore truss bridges (1 C, 13 P) Pages in category "Pratt truss bridges" The following 21 pages are in this ...
The New Hampton bridge is one of three remaining composite cast iron and wrought iron Pratt truss bridges built by Cowin in New Jersey. The others are the Glen Gardner Pony Pratt Truss Bridge (1870) in Glen Gardner and the Main Street Bridge (1870) in Clinton. The single-span bridge is 85 feet (26 m) long and 16.2 feet (4.9 m) wide. [4]