An air terminal is mounted at the parapet of the exterior building wall and connected to an aluminum main conductor. A copper down conductor runs from the roof lightning protection system, secured to the interior face of the tilt wall panel every three feet. A UL listed thru-roof assembly is provided or the down conductor is routed through the wall panel joint around the roof structure. The down conductor extends down to connect to a buried exterior ground ring and a lightning protection ground rod.
AIR TERMINAL PARAPET COPPER DOWN CONDUCTOR RUN FROM ROOF LIGHTNING PROTECTION SYSTEM SECURED TO THE INTERIOR FACE OF THE TILT WALL PANEL EVERY THREE FEET. EXTERIOR BUILDING WALL GRADE BURIED EXTERIOR GROUND RING LIGHTNING PROTECTION GROUND ROD CONNECTED TO DOWN CONDUCTOR FINISHED FLOOR INTERIOR WALL GYPSUM OR CONCRETE ROOF ALUMINUM MAIN CONDUCTOR. REFER TO ARCH. DRAWINGS FOR PENETRATION THROUGH CEILING OR INTO WALL JOINT 3' MIN. 6' MIN. PROVIDE A UL LISTED THRU-ROOF ASSEMBLY OR ROUTE DOWN CONDUCTOR THROUGH WALL PANEL JOINT AROUND ROOF STRUCTURE.
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