The highest point of the coping of a flat roof; or

The mean height of a gable, shed, hip or gambrel roof; or

The highest point of the roof and parapets of a mansard roof.

Mechanical space for building equipment placed on the building roof may be allowed above the maximum height specified, provided that such mechanical space is set back a minimum of 15 feet from any exterior wall, does not exceed 15 feet in height and is adequately screened from view.

Chimneys, radio or television antennas, located upon and constituted as an integral part of a principal structure, may be erected above the height limit specified but are limited to a height not exceeding 65 feet above the average finished grade. Mechanical space for building equipment placed on the building roof may be allowed above the maximum height specified, provided that such mechanical space is set back a minimum of 15 feet from any exterior wall does not exceed 15 feet in height and is screened from view.