Anchoring Systems
Self-Drilling Anchors (SDA)
Drill, grout and anchor in one continuous operation.
Self-drilling anchors combine drilling, grouting and reinforcement in one continuous operation. The hollow threaded bar acts as both drill rod and permanent anchor, making the system ideal for unstable ground where conventional boreholes may collapse.
- Drill, install and grout in one operation
- No casing or pre-drilling required
- Fast and cost-effective installation
- Suitable for collapsing ground
- Continuous grout improves bond
- Easy extension with couplers
- Reduced equipment and labour
- Suitable for restricted access
Technical data
- Range
- R25–R51 and T30–T103
- Steel
- 40Cr or S460NH
- Section lengths
- 3–4 m
- Finishes
- Black, hot-dip galvanized, or epoxy coated
Applications
- Tunnelling and underground construction
- Rock and slope stabilization
- Soil nailing
- Foundation underpinning
- Micropiles
- Retaining walls
- Mining and excavation support
- Unstable or collapsing ground
Technical tables
R32 SERIES
| Hollow Bar | R32L/22 | R32N/20 | R32N/18.5 | R32S/17 | R32S/15 | R32SS/14 | R32/320 |
|---|---|---|---|---|---|---|---|
| Outside Diameter, OD (mm) | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
| Inside Diameter, ID (mm) | 22 | 20 | 18.5 | 17 | 15 | 14 | 19 |
| Cross-Sectional Area (mm²) | 343 | 363 | 420 | 446 | 509 | 516 | 382 |
| Ultimate Load (kN) | 250 | 280 | 280 | 360 | 360 | 400 | 320 |
| Load at 0.2% Yield (kN) | 200 | 230 | 230 | 280 | 280 | 300 | 250 |
| Weight (kg/m) | 2.70 | 2.85 | 3.30 | 3.50 | 4.0 | 4.05 | 3.0 |
R38 SERIES
| Hollow Bar | R38N/21 | R38N/20 | R38N/19 | R38/550 | R38/600 | R38/660 |
|---|---|---|---|---|---|---|
| Outside Diameter, OD (mm) | 38 | 38 | 38 | 38 | 38 | 38 |
| Inside Diameter, ID (mm) | 22.5 | 20.3 | 19.3 | 22.5 | 20.3 | 19.3 |
| Cross-Sectional Area (mm²) | 611 | 700 | 764 | 611 | 700 | 764 |
| Ultimate Load (kN) | 500 | 500 | 500 | 550 | 600 | 660 |
| Load at 0.2% Yield (kN) | 400 | 400 | 400 | 450 | 480 | 530 |
| Weight (kg/m) | 4.8 | 5.5 | 6.0 | 4.80 | 5.50 | 6.0 |
R51 SERIES
| Hollow Bar | R51L/36 | R51L/34 | R51N/33 | R51N/31 | R51/950 |
|---|---|---|---|---|---|
| Outside Diameter, OD (mm) | 51 | 51 | 51 | 51 | 51 |
| Inside Diameter, ID (mm) | 35.5 | 34 | 33 | 30.6 | 30.2 |
| Cross-Sectional Area (mm²) | 802 | 892 | 980 | 1070 | 1146 |
| Ultimate Load (kN) | 550 | 660 | 800 | 800 | 950 |
| Load at 0.2% Yield (kN) | 450 | 540 | 630 | 630 | 760 |
| Weight (kg/m) | 6.3 | 7.0 | 7.70 | 8.4 | 9.0 |
