Every building or part thereof erected or occupied for retail business, service, manufacturing, storage, warehousing, hotel, mortuary, or any other use similarly involving the receipt or distribution by vehicles of materials or merchandise, shall provide and maintain on the same premises, off-street loading space in accordance with the following requirements. Such space shall be in addition to and not considered as meeting a part of the requirements for off-street parking:
1. Retail business, service establishments, and similar uses:
In "B-1" Commercial District, one (1) off-street loading space for each ten thousand (10,000) square feet or fraction thereof, of gross floor area.
2. Industrial, manufacturing or similar uses:
One (1) off-street loading space for each fifteen thousand (15,000) square feet or fraction thereof, of gross floor area.
3. Warehouse or wholesale storage facility:
One (1) off-street loading space for each seven thousand five hundred (7,500) square feet or fraction thereof, of gross floor area.
4. Freight terminal or trucking terminal:
One (1) off-street loading space for each five thousand (5,000) square feet or fraction thereof, of gross floor area.