Is reinforcing steel in concrete structures required to be bonded to long metallic bodies over 70 feet?

The requirement for reinforcing steel in concrete structures to be bonded to long metallic bodies specifically is defined by various standards and codes pertaining to electrical grounding and bonding. In this context, when conductive materials like reinforcing steel bars are embedded in concrete, they typically should not be directly bonded to long metallic bodies that extend beyond a certain length, such as those that exceed 70 feet. This is primarily to avoid creating potential pathways for electrical discharges that can occur during a lightning strike or electrical fault.

The primary focus of bonding is to ensure the safety and integrity of electrical systems, preventing differences in potential that might result in dangerous electrical shock or equipment damage. The reinforcement typically does not require bonding unless specific conditions or characteristics of the site or structure suggest otherwise. By stating that it is false that reinforcing steel is required to be bonded to long metallic bodies over 70 feet, the information acknowledges that standard practices do not mandate this unless specified by particular codes.

Thus, understanding the requirement for bonding in the broader context of lightning protection highlights the importance of evaluating each situation based on applicable codes and environmental factors, rather than applying a blanket rule.