Rock Bolts – Friction Bolt
| Physical Properties | Minimum | Typical |
|---|---|---|
| Yield Strength | 415MPa / 90kN | 510MPa / 115kN |
| Tensile Strength | 510MPa / 115kN | 600MPa / 135kN |
| Friction Bolt Diameter | 39mm |
| Hole Diameter Range | 35mm min./38mm max. |
| Mass per Metre | 1.77kg |
| Cross Sectional Area | 225mm² |
Key Features
- The DSI Underground Friction Bolt is manufactured from high strength steel tube which has a slot along its entire length. A ring, or collar, is welded on the outer end to hold a domed plate to the rock surface.
- The 39mm Friction Bolt is suitable for installation with hand held rock drills (stoppers/drifters).
- Friction bolts can be load tested by fitting a special ring to the bolt prior to its installation. Pull tests can then be conducted with a hollow ram hydraulic jack.
- Further corrosion protection can be provided by hot dip galvanizing.
- Can be used with 47mm FB for mesh pinning.
