(a) Scope. This section shall apply to all spacing between buildings or structures and lot boundaries, between buildings or structures on the same lot and between the walls of a court.
(b) Spacing. Minimum horizontal spacing shall be provided as follows:
(1) Between a wall of a building or structure with required windows and a vertical plane through a lot boundary, the spacing shall be as follows:
(A) For buildings or structures not more than 15 feet in height, not less than 5 feet;
(B) For buildings or structures not more than 25 feet in height, 5 feet plus 1 foot for each 2 feet in height for that portion in excess of 15 feet in height; and
(C) For buildings or structures more than 25 feet in height, 10 feet plus 1 foot for each 10 feet in height for that portion in excess of 25 feet in height, up to a maximum of 20 feet.
(2) Between the walls of a building or structure and between exterior walls of same structure on the same lot, minimum horizontal spacing shall be provided in accordance with subdivision (1) from a vertical plane through an assumed lot boundary located between, but not necessarily equidistant from the walls if there is a required window in one or both of the walls; and
(3) If the spacing required by subdivision (1) or (2), or by any other provision of law is reduced through a change or establishment of a boundary line, the building or structure shall be moved or altered, or both, to meet all the appropriate provisions stated above.
(c) Courts.
(1) Courts having windows opening on any side shall be not less than 10 feet in width. Courts shall be not less than 10 feet in length, unless bounded on one end by a street or yard. At least 50 percent of the required width or length shall be clear of any projections and unobstructed to the sky. Spacing shall also be provided in accordance with subsection (b).
(2) Adequate access shall be provided to the bottom of all courts for cleaning purposes. Every court more than two stories in height shall be provided with horizontal air intake at the bottom not less than 10 square feet in area and leading to the exterior of the building, unless abutting a yard or public way. The construction of the air intake shall be as required for the court walls of the building, but in no case shall it be less than one hour fire-resistive.
(d) Projection into spacing. Allowable projections into horizontal spacing between the walls of buildings or structures and between exterior walls of same building or structure of the same lot shall be as follows:
(1) Projections may extend to the assumed lot boundary from walls without required windows; and
(2) Projections may extend no more than one-half the distance to the assumed lot boundary from walls with required windows.
(Sec. 25-4.2, R.O. 1978 (1983 Ed.)) (1990 Code, Ch. 27, Art. 4, § 27-4.2) (Am. Ord. 97-50)