In any district and in connection with every building, building group, or part thereof thereafter erected and having a gross floor area of 4,000 square feet or more, which is to be occupied by manufacturing, commercial, or similar uses requiring the receipt or distribution by vehicles of material or merchandise, there shall be provided and maintained, on the same lot with such building, off-street loading berths or unloading berths as specified below.

One loading space shall be provided for each 8,000 square feet or fraction thereof of floor area unless required otherwise by the Planning Board.

The loading berth required in each instance shall not be less than 12 feet in width, 25 feet in length, and 14 feet in height, and may occupy all or any part of any required yard.