ACI Adhesive Anchor Installer Certification Practice Exam

To ensure the proper embedment depth of the anchor, where should the measurement start?

1. At the tip of the drill bit

2. At the top of the surface

3. At the widest part of the tip after the taper

4. From the bottom of the hole

The correct answer is: At the widest part of the tip after the taper

To ensure the proper embedment depth of an anchor, it is essential to start the measurement at the correct point. In this case, the correct choice is to measure from the widest part of the tip after the taper. This is because the effective embedment depth begins where the anchor transitions from the tapered part of the anchor to the wider section, ensuring that the anchor is fully seated in the base material. Measuring from the top of the surface would not provide an accurate gauge of the embedment depth since it does not account for the distance that the anchor must penetrate into the substrate for proper load transfer and bonding. Similarly, measuring from the bottom of the hole doesn’t give an indication of how much of the anchor is actually embedded in the concrete or base material, as the depth of the hole could vary. Starting at the tip of the drill bit is also inadequate since it does not reflect the actual position of the anchor within the substrate. Thus, measuring from the widest part of the tip after the taper is critical for ensuring that the anchor is installed effectively and meets the design requirements for load-bearing capacity.