Rock Bolts – Friction Bolt
| Physical Properties | Minimum | Typical |
|---|---|---|
| Yield Strength | 415MPa / 80kN | 510MPa / 100kN |
| Tensile Strength | 510MPa / 100kN | 610MPa / 120kN |
| Friction Bolt Diameter | 33mm |
| Hole Diameter Range | 30mm min./32mm max. |
| Mass per Metre | 1.53kg |
| Cross Sectional Area | 204mm² |
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 33mm 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.
Standard Lengths & Packaging
- Standard bolt lengths include 450mm long and from 600mm to 2400mm in 300mm increments.
- Non-standard lengths are available on application.
- Friction Bolts are supplied in standard packs of 150 bolts (39mm & 47mm) and 300 bolts (33mm).
