The following shall not be considered to be obstructions when located in the required yards:
1. All Yards.
A. Steps and accessibility ramps used for wheelchair and other assisting devices which are four feet or less above grade which will not exceed minimum requirements of the Americans with Disabilities Act
are necessary for access to a permitted building or for access to a lot from a street or alley.
B. Eaves, cornices and similar features may extend one foot into a required yard except eaves may encroach three feet into a yard space when such yard space is 10 feet or more in width.
C. Open, uncovered porches or terraces no higher than the first floor above grade on the side of the building to which they are appurtenant and in no event higher than 30 inches above grade on the side said porch or terrace is located. No railing or other barrier higher than 36 inches shall be placed around said porch or terrace and no such barrier which interferes appreciably with the passage of light or air shall be within five feet of any property line, except as otherwise provided in this Zoning Code. Said porches or terraces when located on corner lots shall meet all requirements for sight triangles.
D. Chimneys projecting 24 inches or less into the yard.
E. Playground and other recreational equipment.
F. Clothes lines.
G. Approved freestanding signs.
H. Arbors and trellises.
I. Flag poles.
J. Window air conditioners projecting not more than 18 inches into the required yard.
K. Fences or walls subject to applicable height restrictions are permitted according to Section 165D.04.
2. Rear and Side Yards.
A. Open off-street parking spaces.
B. Outside elements of central air conditioning systems.
C. Emergency egress systems for basements on an existing structure.
3. Double Frontage Lots. The required front yard shall be provided on each street.
4. Building Groupings. For the purpose of the side yard regulations, a group of business or industrial buildings separated by a common party wall shall be considered as one building occupying one lot.