Rock Bolts – Solid Bar
| Physical Properties | Minimum | Typical |
|---|---|---|
| Yield Strength | 375MPa / 140kN | 400MPa / 150kN |
| Tensile Strength | 570MPa / 210kN | 680MPa / 250kN |
| Calculated Shear Strength | 140kN | 170kN |
| Elongation (After Fracture) | 17% | 22% |
| 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
- Manufactured from a special hot rolled deformed bar designed by DSI Underground.
- This bolt features a rib pattern which actively assists with mixing the chemical anchors during installation.
- The deformed bar rib pattern improves load transfer properties.
- The rolled thread strength nominally equals the column strength of the bar.
- The 24mm chemical anchor bolt is designed to be used with resin anchors, but can also be used effectively with cementitious grouts.
- Corrosion protection may be provided by hot dip galvanizing or alternate coatings.
Installation Guide Lines
- It is imperative that the hole diameter suit the expansion shell to be used.
- The drilled hole length must be longer than the bolt by approximately 50mm.
- Appropriate components are fitted to the bolt. The expansion shell is screwed onto the bolt until the bolt thread just protrudes through the expansion shell plug.
- After placing the bolt in the hole to its full length, the bolt nut is rotated to set the shell and tension the bolt.
Standard Lengths & Packaging
- Standard bolt lengths range from 600 to 6000mm in increments of 300mm.
- Non-standard requirements are available by negotiation.
- Bolts are packaged in bundles with threads protected by heavy duty polyethylene bags.
- Bolt fittings, such as nut and anti-friction washer, are normally supplied fitted to wriggle bolts in the configuration as requested.
