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
- Commonly known as the Thrust Bolt.
- 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 24mm chemical anchor bolts have a hot forged integral head.
- 36mm square heads are used in areas where headroom is low or when bolt tails are undesirable, flat plates are generally used with headed bolts and are un-tensionable.
- The 24mm chemical anchor bolt is designed to be used with resin anchors, but can be effectively used with cementitious grouts.
- Corrosion protection may be provided by hot dip galvanizing or alternative coatings.
- Australian Patent Number 536627 is applicable to the bar design of this bolt.
Installation Guide Lines
- 27-28mm hole diameters are preferred. If larger diameter holes are to be used, refer to "Posimix" bolts.
- Hole depth is critical. Hole depth should be slightly longer than the bolt length to ensure that the bolt plate and bolt head are tight to the roof after installation.
- It is important to follow the resin anchors recommended mixing and hold times as printed on the resin anchor cartons. DO NOT OVER MIX.
