trams), a sub-committee of the Engineering Standards Committee was created, which produced a British Standard design for grooved rails (and fishplates) for tramways in 1903 (BS 2:1903). In the standard, the same design can be specified in 5 different weights, from 90 pounds (lb) per yard to 110lb per yard in 5lb steps. Each section also had a variation for curved sections, with a slightly wider groove.

Girder guard rail

The traditional form of grooved rail is the girder guard section illustrated below. This rail is a modified

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