Copper and aluminum are the most commonly used metals in a lightning protection system (LPS). Metals must be high grade to minimize electrical resistance to powerful lightning surges. Copper weathers to blend into dark-coloured surfaces and can be treated to accelerate patina. It can be used in contact with earth but should not be used where runoff contacts steel or aluminum. Bronze castings should be used for compatible fittings.
by Jennifer A. Morgan, CSI, and Michael Chusid, RA, FCSI, CCS
It is not necessary for most building design and construction professionals to know everything about lightning protection systems (LPS); just the following key points…
Lightning packs a powerful punch. A single bolt carries up to 100 million volts of electricity and has the power to rip through roofs, explode walls of brick and concrete, wreak havoc with circuitry and ignite deadly fires.