Timber Trestles
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 design details similar to trestle bridges because it is so easy to make the roller coaster very high. 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 is appreciated by fans of the type.
The Camas Prairie Railroad in northern Idaho utilized many timber trestles across the rolling Camas Prairie. The major trestle across Lawyers Canyon was the exception, constructed of steel.
The floodway of the Bonnet Carré Spillway in St. Charles Parish, Louisiana, is crossed by three wooden trestles each over 1.5 miles 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.
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A classic wood trestle using logs and beams
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Kinzua Creek, Pennsylvania .
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Interurban train completed trestle after 1915 Galveston Hurricane
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Interurban train with passengers crossing temporary trestle after 1915 Galveston Hurricane
Read more about this topic: Trestle
Famous quotes containing the word timber:
“The primitive wood is always and everywhere damp and mossy, so that I traveled constantly with the impression that I was in a swamp; and only when it was remarked that this or that tract, judging from the quality of the timber on it, would make a profitable clearing, was I reminded, that if the sun were let in it would make a dry field, like the few I had seen, at once.”
—Henry David Thoreau (1817–1862)