Light rail size, length and allowable deviation (GB/T 11264-1989)

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Light Rail Dimensions, Length and Allowable Deviations (GB/T 11264-1989) Light rail is a type of track that has been in use since at least the late 19th century. It is also known as narrow-gauge or baby rail. Light rail is used to transport people and goods between places that are too far away or......

Light Rail Dimensions, Length and Allowable Deviations (GB/T 11264-1989)

Light rail is a type of track that has been in use since at least the late 19th century. It is also known as narrow-gauge or baby rail. Light rail is used to transport people and goods between places that are too far away or inappropriate for pedestrians or automobiles to traverse. It is normally used on surfaces or along routes that are not accessible to heavy duty railway lines.

In the past, light rail was used in mining and industrial applications, and for transportation in cities, towns, and villages. Today, it is also commonly used for leisure and recreational activities.

According to the Chinese National Standard – GB/T 11264-1989, light rail is measured in millimeters (mm) and is divided into different types and gauges depending on its application. In general, light rail should have a minimum cross sectional dimension of 150x150 mm. The maximum allowed width between two rail heads should be no more than 250 mm; and the height between two railheads should be no more than 150 mm. As for the length of the rail, there is no specific limit, but some rules restrict its deviation.

For straight rail, the allowable deviation of its length is ±12 mm. For curved rail, the allowable deviation of its center line should be ± 0.4/3000 per 500mm and the allowable deviation of its vertical edge should be ± 3 mm. Additionally, if the rail has vertical holes, the deviation of its position or dimension should be within ±3 mm.

The quality of light rail matters a great deal and it should be inspected from time to time in order to ensure the safety and stability of the overall system. The end of a light rail should not be bent more than 8°, and it should be free from defects (i.e. cracks, rusting and visible welding defects). Additionally, the rail heads of light rails should be properly lubricated and other areas should be cleaned regularly.

To conclude, light rail dimensions and lengths as well as their respective allowable deviations are specified in the Chinese National Standard – GB/T 11264-1989. Light rail is an important component in rail transport and its quality must be regularly monitored to ensure safe and reliable transportation.

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