Rooftop structures, including but not limited to decorative
architectural elements such as cupolas, weathervanes, railings, etc.;
heating, ventilating and air conditioning equipment; chimneys, etc.,
provided, however, that the foregoing structures shall comply with
the following:
(1)
The area occupied by such rooftop structures
shall not exceed 10% of the total roof area or 250 square feet, whichever
is less;
(2)
Such rooftop structures, except for chimneys,
shall be set back at least 10 feet from any wall of the building;
and
(3)
The height of such rooftop structures above
the ground shall not exceed the maximum height permitted for the principal
building by more than seven feet, and shall not exceed the actual
height of the building by more than seven feet, whichever is less.