scope:

Introduction

This Track Work Instruction covers the planning and carrying out of transposing rail.

Transposing rail is the changing of rails from one side to the other i.e. each ending up in the location that had previously been occupied by the other.

It is normally carried out on curved track where the high rail has become sideworn, but it could be required on straight track where cyclic sidewear is present.

Before planning transposition of rails, you must make certain that the condition of the sideworn rail meets the specification for serviceable rail.

This limits the re-use to line when line speed is less than 80 mph.

See also separate instructions:

TWI 2C007 How to re-rail

TWI 2C008 How to deal with seized fastenings

TWI 2P031 How to change rail

TWI 3P016 How to carry out stressing