Ultimate Security: M10-M20 Undercut Anchors for Cracked Concrete
Our Undercut Anchors represent the pinnacle of mechanical fastening technology. Unlike traditional expansion bolts that rely on friction, the undercutting bolt creates a positive mechanical lock by expanding into a pre-cut cavity at the base of the drill hole. This “keying effect” ensures that the anchor remains secure even in cracked concrete and under intense seismic activity.
Engineered for nuclear power plants, bridge retrofitting, and heavy crane rails, these Self-Undercutting Anchors provide peace of mind where failure is not an option.
- No Expansion Stress: Can be installed much closer to edges and with smaller spacing than wedge anchors.
- Seismic Rated: Specifically designed to perform in cracked concrete under earthquake conditions (C1 & C2 seismic categories).
- High Dynamic Load: Exceptional resistance to fatigue, making them perfect for vibrating machinery and elevators.
- Fire Resistance: Maintains structural integrity under high-temperature fire exposure.
| Size | Drill Dia. (d0) | Effective Depth (hef) | Min. Edge Distance |
|---|---|---|---|
| M10 | 12 mm | 80 mm | 50 mm |
| M12 | 14/15 mm | 100 mm | 60 mm |
| M16 | 18/20 mm | 125 mm | 80 mm |
| M20 | 24/25 mm | 170 mm | 100 mm |
- Self-Undercutting: The anchor creates its own undercut during the setting process using a hammer drill. Fast and efficient.
- Rear-Undercutting: Requires a specialized undercutting drill bit to create the cavity before the anchor is inserted. Offers maximum precision.
- Nuclear Power: Safety-relevant fixings in containment buildings.
- Transportation: High-speed rail noise barriers and bridge pylons.
- Industrial: Heavy-duty turbine mounting and automated robotic lines.
- Public Safety: Elevator guide rails and emergency staircases.
Expert Consulting for Undercut Anchoring Systems
Do your project specifications require ETA-certified Undercut Anchors? Our technical team can help you select the right grade and size. Inquire today for technical drawings and load calculation support!
