When is lightning protection on a building required? Is it installed strictly as customer preference or engineer recommendation, or can an AHJ tell you to put it in? If the AHJ does tell you to install it, what code would set the standard for when a structure meets the criteria to now require it?
NFPA 780 appears to tell you everything about how to install it when required, but doesn't look like it specifies who needs it and who doesn't.
Does one of the IRC or IBC cover that?
