Hairpin Anchor

Hairpin Anchor is designed to provide greater lifting capacities from horizontal to vertical edge lifts. The two castellations on the head of the anchor, assists in protecting against spalling of the concrete during the lift. The castellations reduce the ring clutch rotation during lateral pulls. Resulting in lateral forces being transmitted directly to the edge of the anchor instead of the concrete.

1. Design:
   • A hairpin anchor typically consists of a bent metal rod or wire, shaped somewhat like a hairpin (hence the name).
   • It is made from materials such as stainless steel, carbon steel, or galvanized steel for durability and corrosion resistance.
2. Components:
   • Legs: The anchor has two legs that extend perpendicular to the anchor’s shaft after it’s inserted into a drilled hole in concrete or masonry.
   • Bend: The central bend of the hairpin anchor is designed to provide stability and prevent the anchor from slipping out of the hole.

Functionality:

1. Installation:
   • A hole is drilled into the concrete or masonry material to accommodate the hairpin anchor.
   • The anchor is then inserted into the drilled hole, with the legs extending outward.
   • As the legs of the anchor spread out inside the hole, they create friction against the inner walls of the hole, securing the anchor firmly in place.
2. Usage:
   • Anchoring Objects: Hairpin anchors are used to secure various objects to concrete or masonry surfaces. This includes anchoring structural elements such as steel beams, columns, and machinery to building foundations or floors.
   • Formwork and Temporary Fixtures: They can also be used in formwork construction to anchor temporary structures or fixtures during construction.
3. Advantages:
   • Simple Installation: Hairpin anchors are straightforward to install, requiring only a drilled hole and insertion.
   • High Load Capacity: They can withstand significant loads due to the frictional resistance provided by their design.
   • Versatility: Suitable for a wide range of applications in construction and civil engineering where anchoring into concrete or masonry is required.

Considerations:

1. Load Capacity: Ensure that the hairpin anchor chosen has sufficient load-bearing capacity for the intended application.
2. Installation Depth: Proper installation depth is critical to ensure the anchor achieves maximum holding capacity.
3. Corrosion Resistance: Depending on the environment (such as outdoor or marine applications), choose anchors made from materials that offer adequate corrosion resistance.

Applications:

• Building Construction: Used in anchoring building elements like structural steel, HVAC systems, and equipment mounts to concrete foundations and floors.
• Infrastructure Projects: Applied in civil engineering for securing guardrails, signposts, and other fixtures to concrete barriers or roadways.
• Renovation and Retrofitting: Useful for anchoring new structures or retrofitting existing ones to meet updated safety or structural requirements.