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drop in anchor
Weifeng/Oem
drop in anchor
The M6-M24 Galvanized Carbon Steel Drop-in Anchors for Concrete represent a pinnacle in permanent anchoring technology, designed to create secure, long-lasting connections in concrete and masonry substrates. Fully compliant with ASTM E488-22—the gold standard for concrete anchors—these fasteners combine a robust galvanized carbon steel body with a precision-engineered expansion sleeve, delivering exceptional load-bearing capacity and resistance to environmental degradation.
Unlike temporary fasteners, these drop-in anchors are engineered for permanent installation, making them ideal for applications where reliability cannot be compromised. Their design accommodates both static loads, such as stationary machinery, and dynamic loads, including vibrating equipment, ensuring stability across diverse industrial scenarios. From commercial construction to infrastructure development, these anchors have become a staple in projects requiring unwavering structural integrity.
Parameter | Value |
Material | Galvanized carbon steel (yield strength: 300 MPa) |
Coating Thickness | 8–12 μm (salt spray test: 12 hours no white rust, 48 hours no red rust) |
Effective Anchorage Depth | 30–100 mm (varies by size) |
Temperature Range | -40°C to +80°C |
Load Capacity | Tensile: 8–50 kN, Shear: 12–75 kN (ASTM E488-tested) |
Thread Size | M6 to M24 (metric) |
Installation Torque | 10–70 N·m (per T/ZZB 0731-2018 guidelines) |
These anchors undergo rigorous testing to meet ASTM E488-22 standards, which include evaluations for tensile strength, shear resistance, and fatigue performance. Each unit is subjected to load testing at 125% of its rated capacity to ensure it can withstand unexpected stress. This compliance guarantees that the anchors perform reliably in critical applications, from hospital construction to nuclear power facilities.
The zinc-plated finish is applied using an electroplating process that deposits a uniform layer of zinc (8–12 μm thick) across the anchor’s surface. This coating acts as a sacrificial barrier, protecting the underlying carbon steel from rust and corrosion. In salt spray tests, the anchors resist white rust for 12 hours and red rust for 48 hours, making them suitable for humid environments, coastal areas, and industrial facilities with chemical exposure. This durability translates to a service life of 15+ years in C3 corrosion conditions.
The innovative expansion sleeve design is the key to their exceptional load performance. When installed, the sleeve expands radially against the concrete substrate, creating a mechanical interlock that distributes load evenly. This design minimizes stress concentration, reducing the risk of concrete cracking and maximizing pull-out resistance. Tensile capacities range from 8–50 kN, while shear capacities reach 12–75 kN, ensuring they can handle heavy loads in both vertical and horizontal applications.
These anchors are engineered for use in both cracked and uncracked concrete, a critical feature in seismic zones or structures prone to minor movement. Their effective anchorage depth ranges from 30–100 mm, allowing installation in shallow concrete sections—ideal for retrofitting projects where existing structures have limited thickness. The installation process is straightforward: drill a hole to the specified diameter, insert the anchor, and expand it using a setting tool—no specialized equipment is required, reducing labor costs.
The user-friendly design simplifies installation, even for less experienced workers. The anchor’s body features a flanged top that sits flush with the concrete surface after installation, eliminating protrusions that could pose safety hazards. The precision threads ensure compatibility with standard bolts and fasteners, while the consistent expansion mechanism guarantees uniform performance across multiple installations.
Building Construction: In commercial high-rises, these anchors secure steel curtain walls to concrete facades, ensuring wind resistance and structural stability. They also fasten fire-rated doors and emergency exit signage, critical for safety compliance.
Industrial Machinery: Manufacturing plants use them to mount CNC machines, hydraulic presses, and robotic assembly arms, preventing vibration-induced movement that could compromise precision. Food processing facilities rely on their corrosion resistance to secure stainless steel equipment.
Infrastructure: Highway departments anchor bridge railings and traffic signs to concrete barriers, ensuring they withstand impact and environmental stress. They also secure utility poles and electrical transformers in urban and rural settings.
Renovation Projects: Historic building restorations use these anchors to reinforce aging concrete structures, retrofitting seismic braces and structural supports without damaging original architecture. They are also used in school and hospital renovations to upgrade safety features.
Energy Sector: Solar farms employ these anchors to secure panel mounting systems to concrete foundations, withstanding wind loads and temperature fluctuations. Wind turbine bases use them to anchor support structures, ensuring stability in high-wind environments.
In a recent airport expansion project, these anchors were used to secure baggage handling systems to concrete floors. Subjected to constant vibration from moving belts and heavy luggage, the anchors maintained their grip for over three years, demonstrating their reliability in dynamic load scenarios. Their ease of installation also contributed to the project’s timely completion, reducing downtime in the busy airport terminal.
| Zinc Plated | Thread Diam Size mm | Drill Hole Diam mm | Anchor Length mm | Hole Depth mm | Internal Thread Length mm | Fixture Clearance Hole mm | Tightening Torque Nm |
| M6 | 6 | 8 | 25(30) | 25(30) | 10(11) | 8 | 4 |
| M8 | 8 | 10 | 30 | 30 | 14(13) | 10 | 9 |
| M10 | 10 | 12 | 40 | 40 | 15(15) | 12 | 17 |
| M12 | 12 | 15 | 50 | 50 | 20(19) | 14 | 30 |
| M16 | 16 | 20 | 65 | 65 | 22(25) | 18 | 75 |
| M20 | 20 | 25 | 80 | 80 | 30 | 22 | 144 |
