A trestle bridge is a bridge composed of 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 a higher elevation.[1]
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.[2] 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 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.[3]
In the later 20th century, tools such as 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 a bridge.
^Dutton, Ron (January 2018). "Railroad bridges, viaducts and trestles | Trains Magazine". TrainsMag.com. Retrieved 2020-09-11.
^Walter Loring Webb, Railroad Construction – Theory and Practice, 6th Ed., Wiley, New York, 1917; Chapter IV – Trestles, pages 194–226.
^Charles Lee Crandall and Fred Asa Barnes, Railroad Construction, McGraw-Hill, New York, 1913; Section 96 – Wooden Trestles, pages 212–213.
A trestlebridge is a bridge composed of a number of short spans supported by closely spaced frames. A trestle (sometimes tressel) is a rigid frame used...
Canyon Trestle is a wooden trestle in San Diego County, California. At a length of 597–750 feet (182–229 m), it is the world's largest all-wood trestle. Goat...
for a trestlebridge, 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....
supports a trestlebridge, trestle desk, trestle table, or similar structures Trestlebridge, a bridge composed of trestle support elements Trestle desk, a...
High Trestle Trail is a rail trail running from Ankeny to Woodward in central Iowa. The recreation trail opened on April 30, 2011. It is a paved recreational...
The Manchac Swamp Bridge is a twin concrete trestlebridge near Manchac in the US state of Louisiana. It carries Interstate 55 and U.S. Route 51 over the...
This is a list of trestlebridges. The United States once had many; now some survive and are listed on the National Register of Historic Places (NRHP)...
The Battle River Railway Trestle, commonly known as the Fabyan TrestleBridge, was constructed between 1907 and December 10, 1908 west of Fabyan, Alberta...
TrestlesBridge, more formally known as Railroad Bridge 207.6 or the San Mateo Creek Bridge, is a low railroad viaduct on the coast of Southern California...
part-goat and part-sheep creature reported to live beneath a railroad trestlebridge over Pope Lick Creek, in the Fisherville neighborhood of Louisville...
piers, while steel trestle work may be used for high bridges. Beam bridge — the ancestor of the plate girder bridge Box girder bridge — an evolution of...
The Rosendale Trestle is a 940-foot (290-meter) continuous truss bridge and former railroad trestle in Rosendale Village, a hamlet in the town of Rosendale...
48.6684265; -123.6938238 The Kinsol Trestle, also known as the Koksilah River Trestle, is a wooden railway trestle located on Vancouver Island, north of...
prominent feature of the cutoff was a twelve-mile-long (19 km) railroad trestle crossing the Great Salt Lake, which was in use from 1904 until the late...
145°59′04″E / 37.90044°S 145.98443°E / -37.90044; 145.98443 The Noojee TrestleBridge Rail Trail is a short, 3-kilometre long (1.9 mi) rail trail in Noojee...
traffic on the road bridges, though this would entail a complete replacement of the existing bridge. Part of the western timber trestle approach collapsed...
types of bridges. Cable-stayed suspension bridge "The five main bridge designs". ECL Civil Engineering. 21 March 2022. "Yavuz Sultan Selim Bridge, Istanbul...
bridges in the world "NS - Lake Pontchartrain Trestle". Bridgehunter.com. Retrieved 2016-02-15. "Norfolk Southern Railway Lake Pontchartrain Trestle"...
Clio Trestle is the longest and tallest bridge along the route. The Clio Trestle appears in the 1960 film Guns of the Timberland. The Clio Trestle is a...
The Lethbridge Viaduct, commonly known as the High Level Bridge, is a railway trestlebridge over the Oldman River in Lethbridge, Alberta, Canada. Constructed...
The Muir Trestle, or Alhambra Trestle, is a railway trestlebridge in Martinez, California located within the John Muir National Historic Site. It is...
The Louisiana Highway 1 Bridge, also known as the Gateway to the Gulf Expressway, is a concrete trestle toll bridge in the U.S. state of Louisiana. With...
' The 91 m long Kilcunda Bridge was built over the Bourne Creek. It is protected by the National Trust. This trestlebridge was constructed for the Victorian...