(a) Necessary appurtenant structures such as penthouses or roof structures for the housing of elevators, stairways, tanks, ventilating fans or similar equipment required to operate and maintain the building, fire walls, skylights, towers, steeples, flagpoles, parapets, chimneys, wireless masts or similar structures may be erected above the height limits herein specified; but no penthouse or roof structure or any space above the height limit shall be allowed for the purpose of providing additional floor space for residential use.
(b) Special industrial structures such as a cooling tower, grain elevator, gas holder or other similar structure where the industrial process requires a greater height may be erected above the height limits herein specified; provided that, any such structure shall not occupy more than 15% of the lot area and shall be not less than 50 feet from any lot line.
(c) Any other principal building may exceed the height limits herein specified; provided that, any such building is set back at ground level or required yards are increased one foot for each two feet of extra height.
(Ord. 5745, approved 4-16-1998)