NR TWI 3P061
How to Measure and Define Lead and Lags
active, Most Current
Buy Now
| Organization: | NR |
| Publication Date: | 1 March 2005 |
| Status: | active |
| Page Count: | 4 |
scope:
Introduction
This Track Work Instruction covers how to measure and define 'leads and lags' in rails.
'Leads and lags' are the amount by which a rail across a four-foot is either ahead of, or behind, the opposite rail.
See also the separate instruction:
TWI 3P067 How to plan & organise rail adjusting
This TWI refers to jointed track, generally installed prior to the introduction of CWR and pre-decimalisation.
Document History
NR TWI 3P061
March 1, 2005
How to Measure and Define Lead and Lags
Introduction
This Track Work Instruction covers how to measure and define ‘leads and lags’ in rails.
‘Leads and lags’ are the amount by which a rail across a four-foot is either ahead of, or...