provide ventilation for hot flue gases and smokes. They are vertical
structures such as, for example, GRES-2 Power Station Chimney, Ekibastuz (420m).
Although many kind of industrial facilities have tall chimneys
most of the chimneys with heights of 200 metres and more are part of thermal
thermal power stations (especially coal-fired power stations).
Only few smelters, steel mills, chemical factories and oil refineries
use such tall chimneys.
There is no single standard defining minimum
mandatory requirements governing design and
installation of obstruction lighting; on the other
hand the most common and widespread
regulations are ICAO's and FAA's.