NR TWI 3B021
How to Manage Sub-Standard Ballast Depths
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| Organization: | NR |
| Publication Date: | 1 March 2005 |
| Status: | active |
| Page Count: | 3 |
scope:
Introduction
This Track Work Instruction covers the maintenance of track where ballast depths are less than standard. This is likely to be on bridge decks but can also occur within tunnels, over pipes or arch bridges or where ballast depths required by the standards are unattainable.
See also separate instructions:
TWI 3B001 How to remove contaminated ballast
TWI 3B010 How to assess ballast condition
TWI 3B015 How to ballast glue
Document History
NR TWI 3B021
March 1, 2005
How to Manage Sub-Standard Ballast Depths
Introduction
This Track Work Instruction covers the maintenance of track where ballast depths are less than standard. This is likely to be on bridge decks but can also occur within tunnels, over...