scope:

This standard applies to all track, including plain line and junctionwork in open, subsurface and tube sections and in depots.

This standard does not apply to the conductor rail system, the dimensions and Maximum permitted values and actions for which are covered in S1164.

Where it is mandatory that any of the supporting information in Section 5 of this standard is to be applied, the appropriate requirement is set in Section 3.

The standard does not cover the requirements associated with the inspections and maintenance of the track system, which are the subject of standard S1158.

The standard does not cover the requirements of completed work tolerances, which are subject of standard S1179.

The standard does not cover the requirements associated with Rail Defect management, which are the subject of standard S1178.

The standard does not cover the requirements associated with Track Clearances and Gauging, which are the subject of standard S1156

This standard must be followed by Permanent Way engineering and track maintenance teams with responsibility for the track, as well as Suppliers and Contractors when inspecting and maintaining the track.

Purpose

The purpose of this standard is to define the Maximum permitted values and Conditions to be rectified for track, and the actions to be taken if these are not achieved, in respect of Maintenance works.

The Conditions required and Maximum permitted values for track, and the actions to be taken if these are not achieved, in respect of completed works, i.e. new build and renewals, are covered in S1179.