Rock Bolts
TS-R Bolt
Hollow-bar rock bolt with grout injection and coupler extension.
The TS-R Bolt is a hollow-bar rock bolt combining immediate expansion-shell anchoring with grout injection through the central bore. Threaded sections can be extended with couplers, providing a flexible solution for varying installation lengths and demanding ground conditions.
- Immediate expansion-shell support
- Grout injection through the hollow bar
- Flexible extension using couplers
- Easy transport of shorter sections
- Fast and straightforward installation
- Suitable for weak and fractured rock
- Corrosion-protection options available
Technical data
- Sizes
- M25-14 and M27-12
- Steel
- 40Cr or S460NH
- Available lengths
- 1–6 m
- Corrosion protection
- Hot Dip Galvanizing NS-EN-ISO 1461, Epoxy Coating NS-EN 13438
Applications
- Road and railway tunnels
- Underground mines
- Hydropower tunnels and caverns
- Underground construction and storage
- Weak, fractured or unstable rock
- Deep boreholes requiring extensions
- Restricted-access installation areas
- Temporary and permanent support
Technical tables
TS R-BOLT M25/14 | TECHNICAL SPECIFICATION — ENGLISH
| Specification | Value | Specification | Value | Col 4 |
|---|---|---|---|---|
| Dimension | Ø25/14 (OD 25 mm / ID 14 mm) | Steel Grade | 40cr, | |
| Cross-Section Area (As) | 293mm2 | Compression Plate | Round or square | |
| Weight | 2.3 kg/m | Basis | Nominal mass per metre | |
| Loadbearing Capacity | Yield | Tensile | Borehole Diameter | Ø48–53 mm |
| R-Bolt | 150 kN | 200 kN | Lengths | 3, 4, 5 and 6 m; other lengths on order |
| Yield Strength (ReH) | 445mpa | Tensile Strength (Rm) | 594mpa | |
| Ductility (Agt) | ≥5 | Nut | Dome hexagon nut | |
| Thread Form | R-tread | Thread Length | R-tread all the way | |
| Hot-Dip Galvanizing | NS-EN ISO 1461 | Epoxy Powder Coating | NS-EN 13438 | |
| Corrosion Protection | Double protection: hot-dip galvanizing + epoxy coating | Alternative Finish | Also available in black finish or just HDG | |
| Anchoring | Expansion sleeve or drill bit | Grouting | Specially developed grouting tube | |
| IMPORTANT: The stated load capacities are nominal product values and shall not be used directly as design values. Actual in-situ performance depends on rock and ground conditions, borehole quality, installation, anchorage and grouting. Representative design values shall be established through site-specific testing under actual conditions. |
