Risk assessment according to lightning protection standards, both for ESE air terminals (NF-C 17102; UNE 21186/1M) and for Franklin rods and meshed conductors (IEC-EN 62305), requires a detailed knowledge of the structure to be protected. 

Therefore, the work of and expert is recommended. 

Aplicaciones Tecnológicas launches a software for risk calculation making such analysis easier. 

Download this simplified calculation for free here.