Architectural projections, such as spires, belfries, parapet walls, cupolas, domes, flues and chimneys, are exempt from the height limitations of the chapter.

Special structures, such as elevator penthouses, gas tanks, grain elevators, scenery lofts, radio and television receiving antennas, manufacturing equipment and necessary mechanical appurtenances, cooling towers, windmills, substations, smoke stacks and solar collectors, are exempt from the height limitations of this chapter.

Essential services, utilities, water towers, electric power and communication transmission lines are exempt from the height limitations of this chapter.

Communication structures, such as radio and television transmissions and relay towers, aerials and observation towers shall not exceed in height three times their distance from the nearest lot line.

Agricultural structures, such as barns, silos and windmills, shall not exceed in height twice their distance from the nearest lot line.

Public or semipublic facilities, such as schools, churches, hospitals, monuments, sanitariums, libraries, government offices and stations, may be erected to a height of 60 feet, provided all required yards are increased not less than one foot for each foot the structure exceeds the district's maximum height requirement.

Uncovered stairs, landings and fire escapes may project into any yard, but not to exceed six feet and not closer than three feet to any lot line.

Architectural projections, such as chimneys, flues, sills, eaves, belt courses, ornaments and solar collectors, any project into any required yard.

Residential fences are permitted on the property lines in residential districts, but shall not in any case exceed a height of six feet, exceed a height of four feet in the front yard and be closer than two feet to any public right-of-way.

Security fences are permitted on the property lines in all districts except residential districts, but shall not exceed 10 feet in height and shall be of an open type similar to woven wire or wrought iron fencing.

Accessory uses and detached accessory structures, except garages, are permitted in the rear yard only.

Essential services, utilities, electric power and communication transmission lines are exempt from the yard and distance requirements of this chapter.

Landscaping and vegetation are exempt from the yard requirements of this chapter.

The required street yards may be decreased in any residential or business districts to the average of the existing street yards of the abutting structures on each side. Where the established setback in any residential or business district is greater than the minimum required, no structure shall be permitted to extend in front of the established building setback line.

On a reversed corner lot, each yard abutting a street shall be governed by the front yard requirements.