NR TWI 3B002
How to Decide on Ballast Depth
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| Organization: | NR |
| Publication Date: | 1 March 2005 |
| Status: | active |
| Page Count: | 2 |
scope:
Introduction
This Track Work Instruction covers how to decide on the minimum depth of ballast in situations where it is not possible to achieve full depth to Network Rail Company Specifications.
See also separate instructions:
TWI 3B003 How to understand blanket design
TWI 3B010 How to assess the condition of ballast
TWI 4G014 How to understand the Track Category Matrix
Document History
NR TWI 3B002
March 1, 2005
How to Decide on Ballast Depth
Introduction
This Track Work Instruction covers how to decide on the minimum depth of ballast in situations where it is not possible to achieve full depth to Network Rail Company Specifications....