It re-ran the rolling sphere simulation.
Once the air terminals are set, the software should automatically route the down conductors to the earth termination system. It calculates the necessary spacing (every 60 feet for a Class I structure), avoids low-voltage data lines, and generates a bill of materials (how many copper cables, clamps, and ground rods?).
"The permit isn't ready," Elias said, his voice low.
Before you design anything, you have to ask: Does this building actually need a lightning protection system? The best software includes a risk management module. You input the building dimensions, location (keraunic level), surrounding structures, and occupancy (e.g., hospital vs. barn). The software outputs a numeric risk value. If it’s above the tolerable limit (usually (10^{-5})), you design. If not, you save the client money.
The red vanished. The sphere rolled harmlessly over the new configuration, touching only the tips of the rods. The glass atrium was safe.