What should be the minimum height for grounded structures according to some standards?

The minimum height for grounded structures is often set at 75 feet according to several industry standards. This height is significant because it can influence the effectiveness of lightning protection systems. Structures that exceed this height are more likely to experience direct lightning strikes due to their prominence in the landscape. Setting the minimum height at 75 feet allows for appropriate design and implementation of lightning protection measures, such as grounding and air terminals, which are essential in mitigating the risk of lightning-induced damage.

In terms of grounding, taller structures present unique challenges, including the need for more extensive grounding systems to handle the increased electrical energy that may be transferred during a strike. By establishing a standard height of 75 feet, it provides a guideline for designers and engineers to ensure that adequate protective measures are in place, thereby enhancing the overall safety and reliability of the structure against lightning strikes.