During the tightening of high tensile connections, what is the bolt stretched to?

The correct response indicates that during the tightening of high tensile connections, the bolt is stretched to a specific percentage of its elastic limit at the correct torque. This practice is vital because high tensile bolts operate within their elastic range to ensure that they can withstand the loads they are subjected to without permanently deforming.

By tightening the bolt to a specified percentage of its elastic limit, the connection achieves the necessary clamping force, which is critical to maintaining joint integrity under various stress conditions. This stretching allows the material to return to its original shape after the load is removed, preventing possible failures in the connection. This method helps ensure that the bolts remain secure and functional throughout the operational life of the structure.

Understanding the elastic limit and how it relates to torque ensures that operators properly secure connections, which is critical for safety and structural integrity in any construction involving tower cranes.