General Information Class II Materials: Lighting Conductors, air terminals, grounding electrodes and other associated fittings required for the protection of structures exceeding 23m (75 ft) in height. Reference: NFPA 4.1.1.1 (B) Table 4.1.1.1 (B) NFPA 780 Factory Details Height of the building 80ft or 24.386m m Roof perimeter 358 m NFPA 780 General Requirements: 1. Air terminals are places at the locations indicated, not more than 2’-0” from the edges of ridges, outside corners, or outside edges of main roofs and must extend a minimum of 24” above object to be protected. 2. Air terminals are spaced at 50’-0” O.C. Maximum spacing....
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