Upon what basis should the adjustment of a plumb bob line be made when plumbing a pole?

When plumbing a pole, the adjustment of a plumb bob line should be made based on the steadiness of the bottom of the string. The plumb bob is designed to indicate the vertical alignment of the pole, and its accuracy depends on how steady the bob is at the end of the string. If the bottom of the string sways or is not stable, it can lead to inaccuracies in determining whether the pole is truly vertical.

Adjustments should be made carefully to ensure that the plumb bob remains still, allowing for an accurate reading of the vertical line. This ensures that the pole can be installed correctly, maintaining the structural integrity and safety of the installation. Other factors, such as the height of the pole, the angle of the structure, or surrounding environment, may influence the overall process but do not directly affect the precision of the plumb line itself. Therefore, focusing on the stability of the string is the key to achieving proper alignment.