The following structures or parts thereof shall be exempt from the general height limitations set forth above.
(a) In all districts, the following structures shall be exempt:
(1) Chimney or flue.
(2) Church spire.
(3) Cupola, dome, skylight or other similar roof protrusion not used as habitable floor space.
(4) Electronic receiving antenna.
(5) Farm structure, including a barn, silo, storage bin or similar structure when associated with a farm.
(6) Flag pole.
(7) Parapet or fire wall extending not more than three (3) feet above the permitted height of the building.
(8) Pole, tower or similar structure necessary for essential services.
(9) Roof structure, including elevator bulkhead, stairway, ventilating fan, cooling tower or similar necessary mechanical and electrical appurtenance required to operate and maintain the building.
(b) In the C and I districts, the following structures shall be exempt:
(1) Radio and television tower.
(2) Storage tank.