(a) 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 less, which is to be occupied by storage, warehouse, retail store, wholesale store, hotel, hospital, mortuary, dry cleaning or other uses similarly requiring the receipt or distribution by vehicle of material or merchandise, there shall be provided and maintained on the same lot with such building, at least one off-street loading space; plus one additional such loading space for each additional 20,000 square feet or fraction thereof of gross floor area.
In all industrial districts, in connection with every building or part thereof hereafter erected, there shall be provided and maintained on the same lot with such building at least one off- street loading space for each 10,000 square feet of floor area.
(b) Each loading space shall be not less than twelve feet in width, fourteen feet in height and forty feet in length for tandem trailers or twenty-eight feet for two-axle trucks.
(c) Subject to the limitations in Section 1125.04(a), such space may be located in a required side or rear yard.
(d) No such space shall be located closer than fifty feet to any lot in any "R" District unless wholly within a completely enclosed building or unless enclosed on all sides by a wall or fence not less than six feet in height.