High-voltage research and testing techniques in South Africa paper 6 lightning and its effect on high structures

Different meanings may be attached to the term high structure depending on the reference level from which the height is measured. To make this statement more explicit let us consider three specific examples of high structures for which lightning data are available. The first of these is the Empire State Building, New York, which has a height of 380 metres (1250 ft) above ground level, the ground being approximately at sea level. The building is not isolated but is surrounded by other tall buildings, so that in effect there is a grouped complex of high structures with the top of the Empire State Building forming its peak.