Depending on the building s size and configuration additional air terminals are required around the roof perimeter at intervals not exceeding 20 feet within the field of the roof on rooftop equipment and as dictated by the standards.
Roof lightning rods.
Lightning rods are typically installed around the perimeter of flat roofs or along the peaks of sloped roofs at intervals of 6 1 m or 7 6 m depending on the height of the rod.
The most obvious above roof components are air terminals formerly called lightning rods.
The only aim of a lightning strike is to neutralize itself with the ground.
They must be located at the highest points on a roof.
Does a metal roof need a lightning rod attached.
It is a very common misconception that a lightning rod attracts lightning.
A one foot steel rod is included with each finial but the mounting bracket must be purchased separately.
Steel roofing materials are no more attractive to lightning than any other type of roofing material.
Lightning tends to strike the highest point in any terrain but lightning can also be capricious random.
Let us understand it this way.