Nail expansion anchors are fasteners that consist of a metal sleeve and a nail or shank. When installed into a pre-drilled hole, the anchor expands against the wall of the hole, creating a stronghold that keeps the anchor firmly in place. The simple design makes them suitable for a range of applications, from hanging shelves to securing heavier equipment.

Conclusion

Chemical anchors consist of a resin or adhesive that, when mixed with a hardening agent, polymerizes to form a strong bond with the base material. These anchors are typically used in conjunction with metal rods or bolts that are inserted into drilled holes. The chemical reaction that occurs once the resin is mixed makes the bond resistant to shear and tensile stress, significantly outperforming traditional anchoring solutions in many scenarios.

In the United States, ASTM (American Society for Testing and Materials) standards define the specifications for shear studs. For instance, ASTM A108 has specifications for carbon steel shear studs, which are often used due to their strength and ease of welding. The tolerances for size are usually specified to ensure consistency in performance and reliability in construction.