Except as provided in EC 9.6715, certain roof structures, architectural features and other devices may be erected above the height limits established in this land use code. Some roof structures, architectural features, and other devices may be erected no more than 18 feet above the highest point of the roof of the main building, whether such structure is attached to it or freestanding. Roof structures, architectural features, and other devices that may exceed the highest point of the main building by 18 feet as established above include:
(1) Roof structures for the housing of elevators, stairways, tanks, ventilating fans, and similar equipment required to operate and maintain the building;
(2) Architectural features, including fire or parapet walls, skylights, towers, flagpoles, chimneys, smokestacks, steeples and similar structures; and
(3) Other devices, including television antennas and similar structures, but excluding amateur radio antennas, telecommunication facilities, and radio towers and transmitters. Amateur radio antennas, telecommunication facilities, and radio towers and transmitters may exceed the maximum building height within a zone, provided there is compliance with all other applicable requirements of this land use code.