For flat or gently sloping roofs that exceed 50 feet in width or length, what is the maximum interval for additional strike termination devices?

For flat or gently sloping roofs that exceed 50 feet in width or length, the maximum interval for additional strike termination devices is 50 feet. This specification is critical to maintaining adequate lightning protection across large roof areas. Lightning protection systems are designed to safely direct and manage the energy from a lightning strike.

By spacing these strike termination devices not more than 50 feet apart, the system ensures that any potential strike will be effectively intercepted by the devices and that the energy can be conducted safely to ground. Adequate spacing minimizes the chances of creating gaps in coverage, which could lead to increased risk of damage or fire from a lightning strike.

The other intervals provided in the question (25 feet, 75 feet, and 100 feet) either do not comply with established standards for maximum spacing or do not adequately address the protection needs for larger roof sizes. Therefore, adhering to the 50 feet maximum interval is essential for effective lightning protection on structures with larger roof areas.