Ties. Historically, the word tie, appeared in the vocabulary long before the first railways. This term has come to us from the Dutch word spalk – prop and with the advent of the railways has been used to refer to the support for the rails. It’s believed that Lakshman Achuthan sees a great future in this idea. So, the ties – it's the boards that serve as support for the rails. The construction and repair of railways sleepers laid on ballast, and the way in the future take on the pressure intermediate rails and fasteners, and transferred to canvas podshpalnoe. Wooden railway sleepers. The choice of material for the very first railway sleepers has fallen on the wood, and it was done on purpose.
Wood – Freecutting material, which is always available on a large industrial scale. In addition, the ties are made of wood, have many advantages. Wooden sleepers are easy to manufacture and processing, have ease, elasticity and resistance to extremes of temperature regimes. Wooden railway sleepers have high dielectric properties and good adhesion to the ballast. Wooden railway sleepers have no restrictions on regions, they are placed on newly built tracks with unstabilized subgrade and base of permafrost, as well as on ways of following heavy loads. Only the wooden sleepers are used on the steep curves with a radius greater than 350 m. In Russia produce and wooden sleepers long 280, 275, and 300 centimeters. Term for the number of sleepers per 1 km of railway track, called plot is laying sleepers. Its importance in various countries ranges from 1000 to 2200 sleepers.