5.2.3.4 Protection of high rise buildings (height greather than 60 m)
Additional protection against direct lightning strike for the highest 20% of the structure height for
buildings greater than 60 m or any point above 120 m, using ESEAT or any other means must be
implemented at each façade wall according to a valid standard. Furthermore a minimum of 4
downconductors, interconnected by a ring conductor when applicable, shall be used, distributed along
the perimeter and if possible at each angle of the building.
NOTE : in general the risk due to the lateral flashes is low because only a few percent of all flashes to tall structures will be to
the side and moreover their parameters are a lot lower than those of flashes to the top of structures