| |
|
Use a similar method to establish backstay tension.
Remember that a different sample length will have a
different elongation for the same load. |
| |
| 1m wire sample: |
| |
|
 |
0.5 mm elongation means 5% of breaking load. |
|
1.0 mm elongation means 10% of breaking load. |
|
1.5 mm elongation means 15% of breaking load. |
| |
|
| 2 m wire sample: |
| |
|
1.0 mm elongation means 5% of breaking load. |
|
2.0 mm elongation means 10% of breaking load. |
|
3.0 mm elongation means 15% of breaking load. |
| |
|
| Rod rigging is made of a straight, single strand. Wire
rigging is made of many twisted strands. Normally
rod rigging is 20% stronger than wire of the same
diameter. Wire has the advantage of an early
warning of fatigue when a strand breaks. Fatigue in
rod progresses without any warning at all. It can be
sudden and catastrophic. |
