Rock Bolts – FRP
| - | 15 Tonne Dowel | 20 Tonne Dowel | 30 Tonne Dowel |
|---|---|---|---|
| Tensile Strength | 150kN | 200kN | 300kN |
| Nut/Thread Tensile Strength | 50kN | 55kN | 55kN |
| Single Shear Strength | 45kN | 50kN | 60kN |
| Nut Breakout Torque | 38-41Nm | 38-41Nm | 38-41Nm |
| Mass Per Metre | 645g | 645g | 645g |
| Nominal Bolt Diameter | 20mm | 20mm | 20mm |
| Nominal Cross Section Area of Bolt | 310mm² | 310mm² | 310mm² |
| Major Bar Dimension | 25mm | 25mm | 25mm |
| Specific Gravity in grams/cm³ | 1.7-1.8 | 1.8-1.9 | 2.1-2.2 |
Key Features
- The 20mm dowels are pull formed (matched die) fibreglass construction and are ribbed over their full length to provide maximum load transfer.
- Thread form is of a sinusoidal type, nominally 150mm long and 25mm diameter, and is fitted with an integral drive nut with radial face.
- All 20mm fibreglass dowels are designed to be used with resin anchors and be fully encapsulated.
- Only the 20 and 30 tonne capacity fibre glass dowels should be used with cementitious grouts.
- Bolts over 2400mm in length are available in all dowel types by negotiation.
- Australian Patent Numbers 631881 and 65494 are applicable to these bolts.
Installation Guide Lines
- 26-27mm hole diameters are preferred. Holes over 28mm diameter are not recommended.
- Hole depth is critical. Hole depth should be shorter than the bolt to allow for the height of the washer and nut.
- After insertion of the resin anchors, the bolt is rotated through the anchor(s) while being pushed to the back of the hole.
- It is important to follow the resin anchor recommended mixing and hold times as printed on the chemical anchor cartons. DO NOT OVER MIX.
Standard Lengths & Packaging
- Standard bolt lengths range from 1200 to 1800mm in 300mm increments.
- Other lengths are available by negotiation.
- 1200mm long dowels are packed in 10’s then palletized in lots of 1000.
- 1500 and 1800mm long dowels are packed in 10’s then palletized in lots of 500.
