NR TWI 2G015
How to Use a Sighting Board
active, Most Current
Buy Now
| Organization: | NR |
| Publication Date: | 1 March 2005 |
| Status: | active |
| Page Count: | 4 |
scope:
Introduction
This Track Work Instruction covers the use of sighting boards used in measured shovel packing (MSP).
They are sometimes referred to as boning boards or boning rods. A set of sighting boards includes a target board, an intermediate board and a sighting board.
See also separate instructions:
TWI 2T007 How to carry out measured shovel packing
TWI 2G004 How to measure voids
Document History
NR TWI 2G015
March 1, 2005
How to Use a Sighting Board
Introduction
This Track Work Instruction covers the use of sighting boards used in measured shovel packing (MSP).
They are sometimes referred to as boning boards or boning rods. A set of sighting...