Height. The height regulations prescribed herein shall not apply to televisions and radio towers, church spires, belfries, monuments, tanks, water and fire towers, stage towers or scenery lofts, cooling towers, ornamental towers and spires, chimneys, or elevator bulkheads. Public, semi-public or public service buildings, hospitals, institutions or schools where permitted may be erected to a height not exceeding sixty (60) feet and churches and temples may be erected to a height not exceeding seventy-five (75) feet when the required side yard and rear yard are each increased by one (1) foot for each foot of additional building height above the height regulations for the district in which the building is located.