What is one of the requirements prior to bolt installation?

Prior to bolt installation, it is essential to observe required pre-installation testing for bolt tension. This process ensures that the bolts are capable of achieving the specified tension required for proper performance in structural applications. Pre-installation testing can include verifying the integrity of the bolts, ensuring they meet grade specifications, and confirming that they are free from defects that could compromise their performance when subjected to load.

This requirement is critical because properly installed bolts are necessary for the overall safety and stability of the structure. Ensuring that the bolts have the correct tension helps to prevent issues like loosening over time or failing under load, both of which can lead to serious structural failures.

The other choices do not meet the necessary criteria for pre-installation best practices in structural bolting. For instance, using bare hands for bolt tightening is impractical and unsafe as it does not provide the necessary force and could lead to injury or inadequate bolt connection. Installing bolts only in dry weather is not a standard requirement; instead, bolts should be installed following the manufacturer’s guidance regardless of weather conditions, unless otherwise stated. Lastly, while visibility is important for installation, installing bolts at night does not contribute to the structural integrity and can actually be counterproductive if proper lighting and safety measures are not taken.