What examination method is frequently used to assess in-service anchor bolts?

The examination method commonly used to assess in-service anchor bolts is hammer-testing. This method involves the application of a mechanical impact to the bolt, allowing inspectors to evaluate its condition based on the sound and response produced upon impact. The characteristics of the sound can reveal information about the integrity and potential issues within the bolt, such as cracks or material degradation.

Hammer-testing is particularly useful for anchor bolts because it is a quick, effective, and non-destructive technique that can be performed without requiring extensive setup. It allows for a rapid assessment of the mechanical properties of the bolt, which is critical for ensuring the safety and reliability of structures that rely on these fasteners.

While other methods such as ultrasonic testing, visual inspection, and magnetic particle testing can also be valuable in specific contexts, they may be less practical or effective for evaluating the condition of in-service anchor bolts. Each method has its intended applications and limitations, which make hammer-testing the preferred choice for this scenario.