Construction Supervisor License Practice Exam

What is the acceptable method for installing high strength bolts that connect steel structural members?

1. Impact wrench

2. Torque wrench

3. Ratchet wrench

4. Turn of the nut

The correct answer is: Turn of the nut

The method of installing high strength bolts that connect steel structural members using the "turn of the nut" approach is accepted because it ensures that the bolt achieves the proper tension necessary for structural integrity. This method involves turning the nut a specified amount after it is tightened to establish the correct preload in the bolt. This preload is crucial for maintaining the connection under working loads, preventing slippage, and ensuring that the structure remains stable and safe. The "turn of the nut" technique is particularly important because it compensates for any initial slack in the assembly and accounts for any potential deformation or settling of the materials over time. It provides a reliable way to achieve a consistent and controlled tension, which is essential when working with high strength bolts in structural applications. Other methods may not consistently achieve the desired tension or may lead to issues such as over-tightening or under-tightening, which can compromise the structural connection. For instance, while an impact wrench can provide powerful torque, it may not allow for the precise control needed when dealing with high strength fasteners. Similarly, a torque wrench is beneficial for measuring tension, but relying on it alone without the turn of the nut method may not account for any variations in the joint condition. A ratchet wrench may also be less