(a) When Required. In any district, in connection with every building or part thereof hereafter erected and having a gross floor area of 10,000 square feet or more, which is to be occupied by manufacturing, storage, warehouse, goods display, retail store, wholesale store, market, hotel, hospital, mortuary, laundry, dry cleaning or other uses similarly requiring the receipt or distribution by vehicles of merchandise or material, there shall be provided maintained, on the same lot with such building, at least one off-street loading space plus one additional such loading space for each 20,000 square feet or major fraction thereof, of gross floor area so used in excess of 20,000 square feet.
(b) Dimensions. Each loading space shall be not less than ten feet in width, twenty- five feet in length and fourteen feet in height.
(c) May Occupy Yard. Subject to the limitations in subsection (d) hereof such space may occupy all or any part of any required yard.
(d) Distance in R Districts. No such space shall be closer than fifty feet to any other lot located in any R District, unless enclosed on all sides by a wall or uniformly painted solid board fence not less tan six feet in height.