In any zoning district, every building or structure built, or which is structurally altered, enlarged, or increased in capacity and which requires the receipt or distribution of materials or merchandise by trucks or similar vehicles shall be provided with off-street loading berths subject to the following requirements:
(a) All uses greater than five thousand (5,000) square feet in gross floor area, which shall require the receipt or distribution of materials or merchandise by trucks or similar vehicles, shall have one (1) or more off-street loading berths on the basis of:
(1) If less than five thousand (5,000) square feet, no off-street loading berths are required.
(2) One (1) berth for five thousand (5,000) to forty thousand (40,000) square feet.
(3) Two (2) berths for forty thousand one (40,001) to one hundred thousand (100,000) square feet.
(4) One (1) additional berth for each additional one hundred thousand (100,000) square feet.