Wedge anchors should be tightened with what tool?

• A. Screwdriver
• B. Hammer
• C. Pliers
• D. Calibrated torque wrench

Answer: (D)

Torque control is essential when installing wedge anchors because their holding strength comes from the precise expansion of the anchor in the concrete as the bolt is tightened. If you don’t apply the correct torque, the anchor may not expand enough and can pull out under load, or it can be over-torqued, causing thread damage, anchor distortion, or damage to the surrounding material. A calibrated torque wrench provides a known, repeatable torque value that matches the manufacturer’s installation spec, ensuring the anchor expands properly and develops the required load capacity. Tools like a screwdriver, hammer, or pliers don’t measure or control torque and cannot guarantee correct expansion or safe performance, which is why they’re inappropriate for this task. Using the calibrated torque wrench also supports consistent installations across crews and reduces the risk of failure in critical rescue operations.