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This single-lane bridge measures 12.4 ft (3.8 m) in width and 80 feet (24 m) in length. Built in the style of a steel Pratt pony truss bridge, it features steel I-beams fastened with riveted steel plates. Steel guardrails extend outward from the pony truss on both sides.
CA-36: Tobin Highway Bridge: Extant K-truss: 1984 SR 70: North Fork Feather River: Tobin: Plumas: CA-40: Purdon Crossing Bridge Extant Pratt truss: 1889 1984 Purdon Crossing Road Yuba River South Fork: Nevada City: Nevada
There are ten authentic covered bridges in the U.S. state of California, and eight of them are historic. [1] A covered bridge is considered authentic not due to its age, but by its construction. An authentic bridge is constructed using trusses rather than other methods such as stringers, a popular choice for non-authentic covered bridges.
1981-02-12 Pasadena Los Angeles: Dinkey Creek Bridge: 1938 ... Pony Pratt half-truss Garnett Creek Bridge on CA 29: 1902, 1914 2005-08-05 Calistoga
Gambrel is a Norman English word, sometimes spelled gambol such as in the 1774 Boston carpenters' price book (revised 1800). Other spellings include gamerel, gamrel, gambril, gameral, gambering, cambrel, cambering, chambrel [4] referring to a wooden bar used by butchers to hang the carcasses of slaughtered animals. [1]
The Braga Bridge is a continuous truss bridge. It was the fourth longest span of this type when it was completed in 1966. This list of continuous bridge spans ranks the world's continuous truss bridges in two listings: The first is ranked by the length of main span (the longest length of unsupported roadway) and the second by the total length of continuous truss spans.
The State of California purchased the bridge on September 12, 1951, for $6,000,000 (equivalent to $56.5 million in 2023 [2]). By 1955, traffic exceeded 9,000 cars per day, [ 6 ] and in 1957, traffic was stopped an average of six times per day to allow ship traffic to pass the bridge. [ 3 ]
The original crossing was a three-span Howe truss bridge with wooden trestle approaches, constructed as part of the first transcontinental railroad. [2] The Nevada County Narrow Gauge Railroad was subsequently constructed under the bridge between 1875 and 1876. [3] The trestle portions of the bridge were replaced with embankments by this time. [4]
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