Definitions for railroad tie
This page provides all possible meanings and translations of the word railroad tie
tie, railroad tie, crosstie, sleeper(noun)
one of the cross braces that support the rails on a railway track
"the British call a railroad tie a sleeper"
A heavy, preserved piece of hewn timber laid crossways to and supporting the rails of a railroad.
A railroad tie/railway tie/crosstie, or railway sleeper is a rectangular support for the rails in railroad tracks. Generally laid perpendicular to the rails, ties transfer loads to the track ballast and subgrade, hold the rails upright, and keep them spaced to the correct gauge. Railroad ties were traditionally made of wood, but pre-stressed concrete is now widely used especially in Europe and Asia. Steel ties are common on secondary lines in the UK; plastic composite ties are also employed, although far less than wood or concrete. As of January 2008, the approximate market share in North America for traditional and wood ties was 91.5%, the remainder being concrete, steel, azobé and plastic composite. Coarse aggregate is the standard material for track ballast, which provides drainage and resilience. On lines with lower speeds and axle-weights, sand, gravel, and even coal ash from the fires of steam locomotives have been used. Up to 3000 ties are used per mile of railroad track in the USA, 2640 per mile on main lines in the UK. Rails in the USA may be fastened to the tie by a railroad spike; iron/steel baseplates screwed to the sleeper and secured to the rail by a proprietary fastening system such as a Vossloh or Pandrol are commonly used in Europe.
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"railroad tie." Definitions.net. STANDS4 LLC, 2014. Web. 17 Apr. 2014. <http://www.definitions.net/definition/railroad tie>.