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26-421: The first Cambie Street Bridge, opened in 1891, was built as a simple piled-timber trestle with a trussed timber swing span near the middle. It cost $ 12,000 ( CAD ). The next bridge was a four-lane, medium level steel bridge, 1,247 metres (4,091 ft) long and carrying streetcar tracks. It was completed in 1911 for $ 740,000, opening to traffic on May 24, 1911. The following year, Canada's Governor General,

52-473: A plank or beam. Sometimes additional rungs are stretched between the two beams. A pair of trestle legs can support one or several boards or planks, forming a trestle table or trestle desk . A network of trestle supports can serve as the framework for a trestle bridge , and a trestle of appropriate size to hold wood for sawing is known as a sawhorse . A trestle table is a table with trestle legs. In shape and manufacture, it sometimes resembles variations of

78-573: A bridge. One of the longest trestle spans created was for railroad traffic crossing the Great Salt Lake on the Lucin Cutoff in Utah . It was replaced by a fill causeway in the 1960s, and is now being salvaged for its timber. Many wooden roller coasters are built using designs similar to trestle bridges because such a structure can be strong and support a high track path while using

104-628: A continuous span. The total structural length is 1,100 metres (3,600 ft); it carries 6 lanes of traffic and a 14-foot (4.3 m) pedestrian walkway. The colouring of the concrete was obtained through the addition of volcanic ash from Mount Lassen to the mix. Under the bridge's south end is the Neighbourhood Energy Utility, a city-owned heat transfer station that provides heating and hot water to all new buildings in Southeast False Creek. Both sides of

130-399: A fire broke out on the bridge that was thought to be an arson attack . Four Germans were arrested. The navigation span was a steel through-truss swing span which the city would open on four hours' notice. In 1953, it opened 79 times. Even in its later years, it was opened once or twice a week. The trusses of the swing span projected through the bridge deck, dividing the two outer lanes from

156-509: A higher elevation. Timber and iron trestles (i.e. bridges) were extensively used in the 19th century, particularly for railroads. In the 21st century, steel and sometimes concrete trestles are occasionally used to bridge particularly deep valleys, while timber trestles remain common in certain areas. Timber trestles remain common in some applications, most notably for bridge approaches crossing floodways , where earth fill would dangerously obstruct floodwater. Many timber trestles were built in

182-437: A higher elevation. Timber and iron trestles (i.e. bridges) were extensively used in the 19th century, the former making up from 1 to 3 percent of the total length of the average railroad. In the 21st century, steel and sometimes concrete trestles are commonly used to bridge particularly deep valleys, while timber trestles remain common in certain areas. Many timber trestles were built in the 19th and early 20th centuries with

208-456: A number of short spans supported by closely spaced frames. A trestle (sometimes tressel) is a rigid frame used as a support, historically a tripod used to support a stool or a pair of isosceles triangles joined at their apices by a plank or beam such as the support structure for a trestle table . Each supporting frame is a bent . A trestle differs from a viaduct in that viaducts have towers that support much longer spans and typically have

234-424: A relatively small amount of material. Since loads are well distributed through large portions of the structure it is also resilient to the stresses imposed. The structure also naturally leads to a certain redundancy (provided that economic considerations are not overly dominant). Such wooden coasters, while limited in their path (not supporting loops), possess a certain ride character (owing to structural response) that

260-551: Is a modern structure with a long expected lifetime compared to a wooden trestle. Being less susceptible to fire damage in this brushy location is also an advantage. The approaches to the Kate Shelley High Bridge near Boone, Iowa, are steel trestles. New Orleans utilizes steel trestles to support parts of I-10 , the Pontchartrain Expressway , and Tulane Avenue . Also, trestles support

286-527: Is appreciated by fans of the type. The Camas Prairie Railroad in northern Idaho utilized many timber trestles across the rolling Camas Prairie and in the major grade, Lapwai Canyon. The 1,490-foot (450 m) viaduct across Lawyers Canyon was the exception, constructed of steel and 287 feet (87 m) in height. The floodway of the Bonnet Carré Spillway in St. Charles Parish, Louisiana,

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312-783: Is crossed by three wooden trestles each over 1.5 miles (2.4 km) in length. The trestles are owned by the Canadian National Railway (two trestles) and the Kansas City Southern Railroad. The trestles were completed in 1936, after construction of the Spillway. The trestles may be the longest wooden railroad trestles remaining in regular use in North America. A coal trestle is a rigid-frame trestle supporting train tracks above chutes, used to deliver fuel to boats or trains beneath it. At

338-762: Is often used as part of the running route for events such as the Vancouver Sun Run , the BMO Vancouver Marathon , and the CIBC Run for the Cure. Two TransLink bus routes cross the Cambie Bridge: 17 and N15 . On January 17, 2018, the City of Vancouver announced plans to remove a car lane using it as a bike lane. It noted that the volume of motor vehicles using the bridge has decreased on

364-587: The Great Lakes ports of Buffalo (on Lake Erie ), Sodus Point and Oswego, New York (both on Lake Ontario ). In the United Kingdom, timber trestles were relatively short-lived as a structural type, one of their major uses being to cross the many deep valleys in Cornwall on the spinal rail route through the county. These were all replaced by masonry viaducts. Few timber trestles survived into

390-625: The Prince Arthur, Duke of Connaught and Strathearn , accompanied by the Duchess and their daughter, Princess Patricia , visited Vancouver to officiate at a ceremony renaming the new crossing as the "Connaught Bridge" on September 20, 1912. The name "Connaught" never caught on, and most people continued to call it simply the "Cambie Street Bridge", after the street that runs across it, Cambie Street , named for pioneer Vancouver resident Henry John Cambie . During World War I , on April 29, 1915,

416-406: The earthmover made it cheaper to construct a high fill directly instead of first constructing a trestle from which to dump the fill. Timber trestles remain common in some applications, most notably for bridge approaches crossing floodways , where earth fill would dangerously obstruct floodwater. For the purposes of discharging material below, a coal trestle carried a dead-end track, rather than

442-514: The 20th century. Two that did, and which are still in daily use, cross the Afon Mawddach on the coast of Wales only a few miles apart, at Barmouth and Penmaenpool . The former, built in 1867, carries trains on the heavy rail Cambrian Coast Line travelling from England via Shrewsbury to the various small towns on Cardigan Bay . It also carries a toll-path for pedestrians. Road traffic at this location has to travel many miles around

468-536: The antique field desk , which were used by officers close to the battlefield. Trestle legs come in two kinds: In the United States, a table or desk supported by X-shaped trestles is usually called a sawbuck table . A trestle bridge is composed of a number of short spans supported by closely spaced trestle frames. Each supporting frame is a bent . A trestle differs from a viaduct in that viaducts have towers that support much longer spans and typically have

494-501: The bridge include pedestrian sidewalks separated from motor vehicle traffic by concrete barriers. The Cambie Bridge ranks second of the three False Creek bridges by measure of pedestrian crossings. A 2002 study measured over 1,500 pedestrians crossing the Cambie Bridge in 11 hours on a weekday. The wider east sidewalk is shared with bicycles. Bicycles are also permitted on the bridge roadway in both directions. The Cambie Bridge

520-554: The elevated railroad leading to and from the Huey P. Long Bridge . The first major prestressed concrete trestle railroad bridge built was the Atlantic Coast Line's Salkehatchie River trestle. Trestle support In structural engineering , a trestle support (or simply trestle ) is a structural element with rigid beams forming the equal sides of two parallel isosceles triangles , joined at their apices by

546-656: The estuary to cross at either (for light traffic) the second trestle bridge, at Penmaenpool, which is a toll bridge; or (for heavy traffic) at Dolgellau even further up the estuary. Trestles in cast- or wrought-iron were used during the 19th century on the developing railway network in the United Kingdom. These generally carried decking consisting of some form of trussed girder, as at Crumlin Viaduct, Belah and Meldon ; though two rare examples, at Dowery Dell (demolished in 1962), and Bennerley had lattice girder decks. The steel trestle at Martinez, California, shown below,

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572-403: The expectation that they would be temporary. Timber trestles were used to get the railroad to its destination. Once the railroad was running, it was used to transport the material to replace trestles with more permanent works, transporting and dumping fill around some trestles and transporting stone or steel to replace others with more permanent bridges. In the later 20th century, tools such as

598-539: The last 20 years with at least 80,000 bike trips daily on the bridge. The bike lane was officially constructed on June 2, 2018 and opened on June 25, 2018. In the summer of 2021, an interactive augmented reality mural called Voxel Bridge was installed under Cambie Bridge as part of the Vancouver Biennale . It was removed in August 2023. Trestle bridge A trestle bridge is a bridge composed of

624-411: The top of the trestle, rolling stock (typically hopper cars ) open doors on their undersides or on their sides to discharge cargo. Coal trestles were also used to transfer coal from mining railroads to rail cars. They were prominent when coal was an important fuel for rail locomotion and steamships , before they were replaced with mechanical coal loaders during the 20th century. Coal trestles were used in

650-402: The two inner lanes. This contributed to many motor vehicle collisions. In April 1915, the creosoted wood deck caught fire, with the collapse of a 24.4-metre (80 ft) steel side span. A new, higher, non-opening bridge was built in 1983–1985 to replace the 1911 structure. The entire Cambie crossing was closed for nine months, starting November 1984, while the present, six-lane, concrete bridge

676-472: Was merged with the existing approaches. The new bridge cost $ 52.7 million and was opened on December 8, 1985, after being built to a tight timescale so as to be available for Expo 86 in May 1986. City engineer W.H. Curtis was assisted by E.A. West, Assistant City Engineer, Streets & Structures, who was closely involved in its construction. The 1985 bridge is of a twin post-tensioned prestressed concrete type in

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