Products
Hollow strand
- High strength steel wire strand
- Flexible central steel hollow tube for grout injection
Hollow strand has corrugated hollow tube for grout injection. It is developed for roof bolt for underground mining to be able to make drill hole
Mechanical properties
| Class | Nominal dia. [mm] |
Min. Breaking strength [kN] |
Min. Elongation [%] |
|---|---|---|---|
| 60 tonne | 27.9 | 588 | 3.5 |
Applications
Hollow strand has corrugated hollow tube for grout injection. It is developed for roof bolt for underground mining to be able to make drill hole.