Structures located on a corner shall be set back from both streets the required front yard distance, but in no case less than required in Article
IV.
Penthouses or roof structures for the housing
of stairways, tanks, ventilating fans, air-conditioning equipment
or similar equipment required to operate and maintain the building
and fire or parapet walls, skylights, spires, cupolas, steeples, flagpoles,
chimneys, water tanks, silos or similar structures may be erected
above the height limits prescribed by this chapter but in no case
more than 25% more than the maximum height permitted in the district,
except that spires, steeples, silos, water towers and radio and television
towers shall have no height restrictions except where stipulated by
the Federal Aviation Agency.