When laying out the LP system, should one begin by marking the roof for the location of components?

Marking the roof for the location of components is a critical first step when laying out a lightning protection (LP) system. This practice ensures that the placement of components—such as air terminals (lightning rods), down conductors, and ground electrodes—is accurately determined and organized according to the design specifications. Proper marking helps in visualizing the system and ensures that all necessary components are integrated effectively before any installations begin. It minimizes errors during installation, which can lead to inadequate protection.

By marking the roof, technicians can also account for any obstacles, the roof's geometry, and ensure compliance with safety regulations or standards. This thorough preparation step is essential in creating an effective and reliable LP system.