Rock Bolts – Solid Bar
| Physical Properties | Minimum | Typical |
|---|---|---|
| Yield Strength | 600MPa / 220kN | 650MPa / 240kN |
| Tensile Strength | 850MPa / 310kN | 920MPa / 340kN |
| Calculated Shear Strength | 205kN | 225kN |
| Elongation (After Fracture) | 13% | 15% |
| Mass Per Metre | 2.92kg |
| Bar Core Diameter | 21.7mm |
| Major Bar Diameter | 23.2mm |
| Cross Sectional Area | 370mm² |
| Rolled Thread | M24x3.0mm Pitch |
Key Features
- The DCP Bolt is designed to be used with cementitious grouts.
- The bolt is provided with an expansion shell for preloading, thus allowing for tunnel or mine heading to advance without immediate grouting.
- DCP is the civils version with a plastic grout bell.
- Grooved anchor nut allows for grouting after preloading.
- Anti-corrosion tube over full length of bolt for long life term protection.
- Available in differing material forms to suit design requirements.
- Australian Patent 2003231588.
Installation Guide Lines
- Drill 43-45mm hole diameters. The drill hole length must be longer than the bolt by approx. 50mm.
- Domed washer plate is fitted to the bolt.
- The bolt is inserted into the hole.
- After placing the bolt in the hole to its full length, the bolt is then rotated to set the expansion shell to the required tension.
- Attach grouting adaptor to anchorage.
- Mix 0.33 to 0.35 W/C grout. Pump grout. Grout is pumped through the inner annulus to the bolt end and returns along the outer annulus.
- Terminate grouting with visible grout return.
- Detach adaptor and proceed to next bolt.
Standard Lengths & Packaging
- Standard bolt lengths range from 1200 to 6000mm in increments of 300mm
- Non-standard lengths are available upon request.
- Bolts are packaged in bundles with threads protected by heavy duty polyethylene bags.
- All bolts are supplied fitted with accessories. Exception: washer plates are supplied loose.
