Continuous inspection of bolt pre-tensioning is specifically required when using which method?

The calibrated wrench method requires continuous inspection of bolt pre-tensioning because this method involves applying a specific amount of torque to the bolt to achieve the desired level of tension. This technique relies on precise control and measurement of torque, ensuring that each bolt reaches the correct tension without exceeding its limits or causing any structural weaknesses. Continuous inspection is essential in this context to monitor and confirm that the bolts maintain the specified tension throughout the installation process.

Inspection during this method is critical not only to verify that the right torque is applied but also to ensure that any external factors such as friction or bolt conditions do not alter the effectiveness of the tensioning. Continuous monitoring helps mitigate risks associated with variability in the installation process, which could lead to under-tightened or over-tightened bolts, both of which could compromise the integrity of the structure.