ACI Adhesive Anchor Installer Certification Practice Exam

What condition should a threaded anchor meet before being used?

1. It should be painted to avoid rust

2. Its threads should be intact and usable

3. It must be longer than regulations state

4. It must be flexible to fit different sizes

The correct answer is: Its threads should be intact and usable

A threaded anchor must have intact and usable threads before it can be used. The threads on an anchor play a critical role in achieving proper engagement with the surrounding material (such as concrete) and ensuring a secure bond. Damaged or stripped threads can significantly compromise the anchor's load-carrying capacity and overall performance. Using an anchor with unusable threads poses a risk as it may not hold the intended load, leading to potential failure in the application. While the other conditions mentioned, such as avoiding rust through painting or ensuring the anchor is a certain length, are relevant considerations in different contexts, they do not address the immediate functional integrity of the threaded portion itself. Flexibility also is not a necessary characteristic of a threaded anchor, as anchors typically need to be rigid and strong to perform correctly.