NR TWI 2B003
How to Prepare Trial Holes
active, Most Current
Buy Now
| Organization: | NR |
| Publication Date: | 1 March 2005 |
| Status: | active |
| Page Count: | 3 |
scope:
Introduction
This Track Work Instruction covers the preparation of trial holes used for assessing the condition of ballast and formation.
These holes are normally used to provide additional information when a relaying inspection is being carried out.
See also the separate instruction:
TWI 3B001 How to dispose of contaminated ballast
TWI 3C023 How to decide on, & interpret, inspection sleepers
Document History
NR TWI 2B003
March 1, 2005
How to Prepare Trial Holes
Introduction
This Track Work Instruction covers the preparation of trial holes used for assessing the condition of ballast and formation.
These holes are normally used to provide additional...