Massachusetts Construction Supervisor License (CSL) Practice Test

What method is best for checking the quality control of high strength bolts in steel framed buildings?

1. Caliper measurement method

2. Torque wrench and turn of the nut method

3. Ultrasonic testing method

4. Visual inspection method

The correct answer is: Torque wrench and turn of the nut method

The torque wrench and turn of the nut method is the preferred approach for ensuring the quality control of high strength bolts in steel framed buildings for several important reasons. This method specifically addresses the tensioning of the bolts, which is crucial for their performance. High strength bolts must be installed with the correct amount of torque to ensure they achieve the required preload and maintain joint integrity under load. By using a torque wrench, the installer can apply a precise amount of torque to the nut, which is critical for minimizing any potential loosening during service. The turn of the nut method complements this by requiring the installer to turn the nut a specified number of turns beyond a snug condition, which ensures that additional tension is added. This allows for accurate control over the clamping force that holds the structural components together, vital for the reliability and safety of the connection. While other methods such as caliper measurements, ultrasonic testing, and visual inspections can be used in various contexts, they do not provide the same level of assurance regarding the tension that the bolt experiences under load. Caliper measurements may not accurately reflect the condition of the fastener once installed, ultrasonic testing can be more complex and is often used for detecting flaws rather than ensuring proper tension, and visual inspections may not be