For every building, structure or part thereof having 5,000 square feet or more gross building area, erected and occupied for commerce, manufacturing, storage, goods display, retail store, wholesale store or warehouse, distribution center, market, restaurant, laundry, dry cleaning, place of public or quasi-public assembly, industry, or other similar uses involved in the receipt and distribution by vehicles of materials or merchandise, there shall be provided and permanently maintained, adequate space for standing, loading, and unloading services in order to avoid undue interference with the public use of streets or alleys, and with areas designated for parking and their passageways and driveways, in accordance with the following standards:
a. Every such building, structure or part thereof having at least 5,000 square feet of gross building area, as aforesaid, but less than 10,000 square feet of such gross building area, there shall be provided at least one truck standing, loading and unloading space on the premises, not less than 12 feet in width, 65 feet in length, and 14 feet in height.
b. For each additional 25,000 square feet of gross building area as aforesaid, or fraction thereof, there shall be provided one additional truck standing, loading and unloading space having the foregoing minimum dimensions.
c. No such truck standing, loading, or unloading space shall be in front of not visible from the front of any building, and no loading or unloading shall be conducted in front of any building.