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Prior Chicago Building Code
BUILDING CODE AND RELATED EXCERPTS OF THE MUNICIPAL CODE OF CHICAGO
DIVISION 1 - ADMINISTRATION
DIVISION 2 - DEFINITIONS
DIVISION 3 - USE AND OCCUPANCY CLASSIFICATIONS
Subdivision 302 - Classification
Subdivision 303 - Assembly
Subdivision 304 - Business
Subdivision 306 - Factory
Subdivision 307 - High-Hazard
Subdivision 308 - Institutional
Subdivision 309 - Mercantile
Subdivision 310 - Residential
Subdivision 311 - Storage
Subdivision 312 - Utility and Miscellaneous
DIVISION 4 - SPECIAL DETAILED REQUIREMENTS BASED ON USE AND OCCUPANCY
DIVISION 5 - GENERAL BUILDING HEIGHTS AND AREAS
DIVISION 6 - TYPES OF CONSTRUCTION
DIVISION 7 - FIRE-RESISTANCE-RATED CONSTRUCTION
DIVISION 8 - INTERIOR FINISHES (NA)
DIVISION 9 - FIRE PROTECTION SYSTEMS
DIVISION 10 - MEANS OF EGRESS
DIVISION 11 - ACCESSIBILITY
DIVISION 12 - INTERIOR ENVIRONMENT
DIVISION 13 - ENERGY EFFICIENCY AND ENVIRONMENTAL PROTECTION
DIVISION 14 - EXTERIOR WALLS (NA)
DIVISION 15 - ROOF ASSEMBLIES AND ROOFTOP STRUCTURES (NA)
DIVISION 16 - STRUCTURAL DESIGN
DIVISION 17 - STRUCTURAL TESTS AND SPECIAL INSPECTIONS
DIVISION 18 - SOILS AND FOUNDATIONS
DIVISION 19 - CONCRETE
DIVISION 20 - ALUMINUM (NA)
DIVISION 21 - MASONRY
DIVISION 22 - STEEL
DIVISION 23 - WOOD
DIVISION 24 - GLASS AND GLAZING (NA)
DIVISION 25 - GYPSUM BOARD AND PLASTER (NA)
DIVISION 26 - PLASTIC (NA)
DIVISION 27 - ELECTRICAL
DIVISION 28 - MECHANICAL SYSTEMS
DIVISION 29 - PLUMBING SYSTEMS
DIVISION 30 - ELEVATORS AND CONVEYING SYSTEMS
DIVISION 31 - SPECIAL CONSTRUCTION (NA)
DIVISION 32 - ENCROACHMENTS INTO THE PUBLIC RIGHT-OF-WAY
DIVISION 33 - SAFEGUARDS DURING CONSTRUCTION
DIVISION 34 - EXISTING STRUCTURES
DIVISION 35 - REFERENCED STANDARDS

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13-56-190  Class H-2, moderate hazard storage units.
   Storage units other than Class H-1, low-hazard storage units, and Class H-3, garages, shall be classified as Class H-2, moderate hazard storage units.
(Prior code § 48-9.2)
13-56-200  Garages.
   Buildings, or parts thereof, designed or used for the shelter, storage or servicing of motor vehicles containing flammable fuel shall be classified as H-3, garages, except parking facilities as defined in Section 13-96-890 which shall be classified as Class J, miscellaneous buildings and structures.
(Prior code § 48-9.3)
13-56-210  Class I, hazardous use units.
   Buildings or parts thereof, used for the manufacturing, processing, storage or use of materials of the following general classifications shall be classified as Class I, hazardous use units:
   (a)   Highly combustible, inflammable or explosive products or materials which are likely to burn with extreme rapidity or from which poisonous fumes or explosives may result in the event of fire;
   (b)   Highly corrosive, toxic or noxious alkalies, acids or other liquids;
   (c)   Fume hazardous, explosive, poisonous, irritant or corrosive gases;
   (d)   Materials involving explosive mixtures of dust or which result in the division of matter into fine particles subject to spontaneous combustion;
   (e)   Chemicals or synthetic paints or enamels involving flame, fume or explosive hazard;
   (f)   Other hazardous uses as defined in Chapter 13-112.
(Prior code § 48-10)
13-56-220  Class J, miscellaneous buildings and structures.
   Miscellaneous structures and structures of a temporary character shall be constructed and equipped to meet the requirements of the code commensurate with the fire and life hazard incidental to their use; and where not specifically herein provided for, the building commissioner shall adopt rules and regulations to fix the character of construction in relation to the fire limits and proximity to adjacent structures. Class J, miscellaneous buildings and structures, shall include, among others, the following:
   Bridges
   Carports
   Coal pockets
   Fences
   Fire stations
   Gasoline filling stations
   Greenhouses
   Lumber yards
   Parking facilities
   Police stations
   Poles and flagpoles
   Private garages
   Public utility structures
   Retaining walls
   Roundhouses
   Signs
   Sheds
   Stables
   Tanks
   Telephone exchanges
   Temporary buildings
   Tents
   Trestles
   Water, transmission and radio towers.
(Prior code § 48-11; Amend Coun. J. 9-13-89, p. 4604; Amend Coun. J. 11-2-94, p. 58476; Amend Coun. J. 3-5-03, p. 104990, § 21; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1; Amend Coun. J. 3-29-17, p. 45477, § 2)
13-56-230  Mixed occupancy – Requirements.
   Buildings or structures hereafter designed or used for mixed occupancy shall comply with the requirements of Sections 13-56-240 to 13-56-280, inclusive. Mixed occupancy shall not be permitted in intermediate care facilities for the developmentally disabled – 15 or less.
(Prior code § 48-12; Amend Coun. J. 12-21-84, p. 12140)
13-56-240  Mixed occupancy – Defined.
   A building designed or used for two or more occupancies, representing different occupancy classifications, except in the case of auxiliary uses as described in Section 13-56-250, shall be classified as a mixed occupancy.
(Prior code § 48-12)
13-56-250  Auxiliary uses.
   Rooms and spaces normally provided and incidental to the principal use of a building and under the same management and control shall be classified as auxiliary uses and shall not be considered as constituting a mixed occupancy.
   Auxiliary uses shall not introduce any unusual hazard or danger unless in the judgment of the building commissioner such auxiliary use is indispensable to the principal use.
   Auxiliary uses, other than legal home occupations licensed under Section 4-6-270, shall be limited to a maximum of five percent of the area occupied by the principal use, provided however, that the building commissioner and the fire commissioner may jointly approve auxiliary uses exceeding said five percent of the area of the principal use when in their opinion such auxiliary uses do not unduly increase the hazards. A legal home occupation licensed in accordance with Section 4-6-270 shall not permanently occupy more than ten percent of the floor area of any single-family residence or 15 percent of the floor area of any unit in a multiple dwelling building; provided, however, that in no instance may one or more home occupations in any single dwelling unit permanently occupy more than 300 square feet of the dwelling unit.
   Loading spaces and appurtenant driveways extending more than five feet into a building or structure when used by vehicles with internal combustion engines on any street level floor within industrial units and storage units one story in height, shall be limited to 20 percent of the floor area of the principal use, and shall be separated from the principal use by a loading platform, curb, railing or other fixed barricade. The vehicles with internal combustion engines using such loading spaces and appurtenant driveways shall not remain inside the building for a longer period than necessary for loading or unloading and while inside the building shall at all times be under control of the driver.
   Spaces classified as auxiliary uses shall comply with the applicable requirements of this Code pertaining to the specific use but not require the special separations as established in Section 13-56-280 and shall not govern height or area limitations as established for the principal occupancy of the building.
(Prior code § 48-12.2; Amend Coun. J. 9-13-89, p. 4604; Amend Coun. J. 4-1-98, p. 65910 § 6; Amend Coun. J. 3-5-03, p. 104990, § 21; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1; Amend Coun. J. 5-9-12, p. 27485, § 174)

 

Notes

4-6-270
The hyper-linked material is not part of the Chicago Building Code infobase and therefore is not included herein.  The material is included in other provisions of the Chicago Municipal Code.  The complete Chicago Municipal Code is available for purchase from American Legal Publishing in both print and Folio® versions.  Please click here for the appropriate American Legal order form in printable Adobe® PDF format.  For additional information, you may visit American Legal's website by clicking here.
13-56-260  Mixed occupancy – Applicable provisions.
   When a building is occupied by two or more occupancies not included in one classification, the provisions of this Code applying to each use shall apply to such parts of the building as come within that classification.
(Prior code § 48-12.3)
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