What are the types of chairs used in railway?

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What are the types of chairs used in railway?

CHAIRS : They are used to hold the double headed and bull headed rails in required position. They are made of cast iron having two jaws and a rail seat. In order to fix the double headed or bull headed rail to a chair, the rail is placed between the two jaws of the chair.

What is railway chair?

Rail chair consist of 2 jaws and a rail seat. The function of the chairs in railway is similar to that of the iron tie plate in the ordinary rail fastening system, and both can support and fix the rail. The rail chair is installed between the rail sleepers and the rails, fixed with screws, and locked with a steel key.

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What are rail free fastenings?

RDSO has developed a new design of RAIL FREE FASTENING to restrict the toe-load of normal fastening from being transmitted to the rail. The new design of RAIL FREE FASTENING facilitates for doing online de-stressing of LWR without taking traffic block on Indian Railways.

What holds the rail to the sleeper?

Spring spikes or elastic rail spikes are used with flat-bottomed rail, baseplates and wooden sleepers. The spring spike holds the rail down and prevents tipping and also secures the baseplate to the sleeper.

What are the types of rails?

There are three types of rails:

  • Double-headed rails.
  • Bull-headed rails.
  • Flat-footed rails.

What is creep in railway?

Creep in rail is defined as the longitudinal movement of the rails in the track in the direction of motion of locomotives. Creep is common to all railways and its value varies from almost nothing to about 6 inches or 16cm.

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What is a slide chair?

Slide Chairs are plates of special shape in which the Tongue and Stock rails rest. The Stock rail is bolted to the lug (projecting arm of the chair) and the Tongue rail slides laterally. The width of these chairs varies from 12 cm to 15 cm and the length increases towards the head.

Can you date railroad spikes?

Railroads in the U.S. no longer use date nails. With the advent of the computer it is easier to keep records that way. Also, the treatments are pretty much fine tuned and standardized at this point.

Why are railroad spikes Square?

The spikes used to fasten T-shaped railroad track to wooden ties have an L-shaped head and a square shank. Its square cross section gives a railroad spike much higher holding strength than a fastener having the same amount of metal but a circular cross section has; roughly speaking, about 50\% more. …

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Why do train tracks have gravel?

The crushed stones are what is known as ballast. Their purpose is to hold the wooden cross ties in place, which in turn hold the rails in place. The answer is to start with the bare ground, and then build up a foundation to raise the track high enough so it won’t get flooded.

What are railroad ties called?

A railroad tie, crosstie (American English), railway tie (Canadian English) or railway sleeper (Australian and British English) is a rectangular support for the rails in railroad tracks.

How long is a rail?

Even with the advent of today’s longer cars, 39 feet has remained the standard for rail owing to limitations in steel mills and ease of handling.