Heavy manufacturing, warehouses, and waste disposal - junkyards, landfills, and incinerators.
| Zoning Ordinance reference | ยง 17-5-0104 View the Chicago Zoning Ordinance | 
| Floor area ratio | 1.2 | 
| Maximum building height | None. | 
| Lot area per unit (density) | None. | 
| Minimum lot area | |
| On-site open space | N/A | 
| Front yard | None, except for industrial parks and properties bordering R-zoned lots (see 17-5-0405-A for details). | 
| Side | None, except for industrial parks and properties bordering R-zoned lots (see 17-5-0405-A for details). | 
| Back yard | None, unless rear property line borders R-zoned lot's side or rear property line. Then the minimum setback is 30 ft. |