In all districts in connection with every building or part thereof hereinafter (hereafter) erected, having a gross floor space of 10,000 square feet or more, which is to be occupied by manufacturing, storage, warehouse, retail or wholesale store, hotel, hospital, mortuary, laundry, dry cleaning or other use similarly requiring the receipt or delivery by vehicles of material or merchandise, there shall be provided and maintained on the same premises at least one off-street loading space, plus one additional space for each 20,000 square feet or major fraction thereof of gross floor area so used in excess of 20,000 square feet.
(1) Each loading space shall not be less than ten feet wide, 35 feet long and 14 feet high.
(2) Such space may occupy all or any part of any required yard or court space, except a front yard.
(3) No such space shall be located closer than 50 feet to any other lot in any R district unless completely enclosed within a building or shielded by a wall or solid board fence or masonry wall not less than six feet high.