Roof structures permitted above maximum height

A. The following roof structures are permitted above the maximum height as specified in this chapter, provided that the total area of all such appurtenances is not more than 1/3 of the total roof area of the building:
- (1) Structures for the housing of elevators and elevator shafts.
- (2) Stairways.
- (3) Fire or parapet walls.
- (4) Skylights.
- (5) Towers.
- (6) Steeples.
B. The following roof structures are permitted above the maximum height as specified in this chapter, provided that the total area of all such appurtenances is not more than 1/3 of the total roof area of the building, and provided that such features shall be set back from the edge of the roof a minimum distance of one foot for every two feet by which they extend above the roof:
- (1) Heating and air-conditioning equipment.
- (2) Ventilating fans.
- (3) Solar collectors.
- (4) Storage tanks for water.
- (5) Television, radio or satellite dish antennae or masts.
- (6) Chimneys or roof-mounted smokestacks.
- (7) Roof-mounted flagpoles.
- (8) Similar equipment required to operate and maintain a building.
C. No such roof structure as set forth in this subsection shall exceed the maximum height for the zone in which it is located, except by the amounts allowed herein:
- (1) Buildings from one to six stories: 10 feet.
- (2) Buildings exceeding six stories: 10 feet plus one foot per story above the sixth story to a maximum total of 20 feet.
- (3) Height restrictions for freestanding structures:
  - (a) Freestanding flagpoles shall not exceed the following:
    - [1] Residential zones: the height of any existing permitted principal building on a lot.
    - [2] Commercial and industrial zones: a height of 10 feet over any existing principal building on a lot.
  - (b) Freestanding smokestacks shall not exceed the following:
    - [1] Vacant lots: freestanding smokestacks shall not be permitted.
    - [2] Residential zones: freestanding smokestacks shall not be permitted.
    - [3] Commercial zones: freestanding smokestacks shall not exceed a height of 40 feet over any permitted principal building on the lot.
    - [4] Industrial zones: freestanding smokestacks shall not exceed a height of 100 feet over any permitted principal building on the lot.