In all districts where property uses include the loading and unloading of materials or merchandise from vehicles, off-street loading and unloading facilities shall be provided in accordance with the following requirements
(a) Hospitals or sanitariums containing 40,000 to 100,000 square feet of gross floor area, one off-street loading and unloading space, plus one additional such space for each additional 100,000 square feet of gross floor area or fraction thereof in excess of 100,000 square feet;
(b) Buildings containing bowling alleys, taverns, restaurants or any retail shops and having 10,000 or more square feet of gross floor area, one off-street loading and unloading space;
(c) Banks, business or professional offices or public administration buildings containing 20,000 square feet or more of gross floor area, one off-street loading and unloading space;
(d) Buildings containing furniture and appliance stores, motor vehicle sales, wholesale stores, household equipment or machinery sales, and having 8,000 to 25,000 square feet of gross floor area, one off-street loading and unloading space; and
(e) Buildings containing manufacturing uses, research and testing laboratories, laundry and dry-cleaning establishments, printing, binding, publishing and issuing of newspapers, periodicals, books and other reading matter, warehouse and storage facilities, engraving shops, assembly of materials and products, processing and distribution of materials and products and other similar uses having more than 8,000 square feet of gross floor area, exclusive of basement area, and less than 40,000 square feet of gross floor area, one off-street loading and unloading space, plus one additional such space for each additional 60,000 square feet of gross floor area in excess of 40,000 square feet.