(b) Exceptions to height limitations:
(1) On through lots 150 feet or less in depth, the height of a building may be measured from the adjoining curb level on either street.
(2) On through lots more than 150 feet in depth, the height regulations and basis of height measurements for the street permitted the greater height, shall apply to a depth of not more than 150 feet from the street.
(3) Penthouses or roof structure for the housing of elevators, stairways, tanks, ventilating fans or similar equipment required to operate and maintain the building, fire or parapet walls, skylights, television aerials, electrical transmission and communication poles and towers, theatre screens, steeples, roof signs, flagpoles, chimneys, smokestacks, wireless masts, water tanks, grain elevators, silos, gas containers, industrial installation requiring a vertical production procedure such as flour mills, steel mills and refineries, or similar structures may be erected above the height limits herein prescribed, but no such structures or any place above the height limits shall be allowed for the purpose of providing additional floor space for residential, business or industrial use. (Ord. 312. Passed 9-26-77.)