FRICTION BOLT
Roof bolts are manufactured from hot-rolled, deformed bar, featuring a rib pattern that ensures better adhesion when fixed with chemical anchors.
Has physical characteristics to maximise loads, transfer from the rock to the bolt, with higher transverse ribs, together with lower profile longitudinal ribs.
Rolled thread nominally equals the column strength of the bar. Available in spin-to-stal (shear pin nut) or reverse spin (nibbed) configurations.
Rolled thread nominally equals the column strength of the bar. Available in spin-to-stal (shear pin nut) or reverse spin (nibbed) configurations.
| Bolt Diameter , mm (in.) | 16 (5/8) | 18 (0.71) | 20 (0.79) | 25 (1.0) |
|
Min. Yield Load , kN (ibf) |
110 (24.729) | 180 (40.466) | 160 (35.969) | 210 (35.969) |
|
Min. Yield Strength , Mpa (ksi) |
500 (72.52) | 600 (87.02) | 500 (72.52) | 500 (47.210) |
|
Min. Ult Tensile Load , kN (lbf) |
130 (29.225) | 250 (56.202) | 230 (51.706) | 360 (80.931) |
|
Min. Ult Tensile Strength , Mpa (ksi) |
640 (92.83) | 820 (118.93) | 730 (105.88) | 730 (105.88) |
|
Calculated Shear Load , kN (lbf) |
130 (29.225) | 150 (33.721) | 160 (35.969) | 210 (47.210) |
|
Standard Elongation , % |
16 | 16 | 16 | 16 |
|
Uniform Elongation , % |
8 | 8 | 8 | 8 |
|
Density , kg/m (lb/ft) |
1.67 (1.12) | 2.14 (1.44) | 2.58 (1.73) | 3.85 (2.59) |
| Bar Core Diameter , mm (in.) | 16 (58) | 18 (0.71) | 20 (0.79) | 25 (1) |
| Major Bar Diameter , mm (in.) | 17.4 (0.69) | 19.8 (0.78) | 21.8 (0.86) | 24.5 (0.96) |
| Cross Sectional Area , mm2 (in2) | 210 (0.33) | 316 (0.49) | 316 (0.49) | 465 (0.72) |
- Bolts are manufactured to clients’ requirements
- Non-standards available on request
