PUA-UM Undercut Mechanical Anchor
A post-installed mechanical anchor in which tightening the nut drives the bottom expansion segments outward, forming a mechanical lock at the base of the hole. High load capacity and seismic performance.
Product Certification：
Load capacity report / Type test report for Class S anchors / 2 million-cycle fatigue test report / 180-minute fire resistance report / 144-hour salt spray test report / Material analysis report / Thread accuracy report / CE certification
Scope of application：
Widely used for heavy-duty, seismic-resistant anchoring in concrete: curtain walls, steel structures, equipment bases, lifts and building strengthening.
Product Advantages
Mechanical keying, load-ready on installation
No curing time is required. The anchor is ready immediately and reaches its design ultimate load at once, greatly improving on-site efficiency.
Outstanding seismic and fatigue resistance for high-cycle dynamic loads
Deep physical interlock delivers excellent fatigue, impact and seismic performance.
No secondary drilling, saving time and effort
Eliminates the tedious second drilling step, cutting installation complexity and time.
Technical parameters
| Material | Carbon steel、304、316 |
| Grade | Grade 8.8 |
| Surface treatment | Zinc plated、Hot-dip galvanised |
| Substrate | Cracked concrete、Non-cracked concrete |
Specification and Model
| Product model | Hole dia. d (mm) | Hole depthh（mm） | Anchor length l (mm) |
|---|---|---|---|
| M8/12/40 | 12 | 40 | 80 |
| M8/12/60 | 12 | 60 | 100 |
| M10/14/60 | 14 | 60 | 100 |
| M12/18/80 | 18 | 80 | 130 |
| M16/22/100 | 22 | 100 | 160 |
| M16/22/125 | 22 | 125 | 190 |
Operating Instructions
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