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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
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
CHAPTER 15-16 FIRE PROTECTION EQUIPMENT
ARTICLE I. FIRE PROTECTION (15-16-010 et seq.)
ARTICLE II. FIRE PROTECTION EQUIPMENT (15-16-170 et seq.)
PART 1. STANDARD SPRINKLER SYSTEMS (15-16-170 et seq.)
15-16-170 Definition of system.
15-16-180 Other definitions.
15-16-190 Permit and fees.
15-16-200 Installation certification.
15-16-210 Inspections.
15-16-220 Notice of defective conditions.
15-16-230 Requirements for light hazard occupancies.
15-16-240 Requirements for extra hazardous occupancies.
15-16-250 Requirements for special systems.
15-16-260 System tests.
15-16-270 Water supply requirements.
15-16-280 Use of pressure tank for other services.
15-16-290 Gravity tanks.
15-16-300 Pressure tanks.
15-16-310 Fire pumps.
15-16-311 Test manifold.
15-16-320 Supply to tanks.
15-16-330 Filling pipe.
15-16-340 Small equipment.
15-16-350 Location and arrangement of sprinklers.
15-16-351 Display booths.
15-16-360 Sprinklers.
15-16-370 Sprinkler piping.
15-16-380 Piping supports.
15-16-390 Siamese connections.
15-16-400 Valves.
15-16-410 System drainage.
15-16-420 Hand hose connections.
15-16-430 Protection against freezing.
15-16-440 Protection against corrosion.
15-16-450 Test pipes.
15-16-451 Test pipes for high-rise buildings.
15-16-460 Dry pipe systems.
15-16-470 Dry pipe system capacity limits.
15-16-480 Quick opening devices.
15-16-490 Non-freezing systems.
15-16-500 Gauges.
15-16-510 Relief valves.
15-16-520 Painting or finishing.
15-16-530 Alarms.
15-16-540 Spare sprinklers.
15-16-550 Reserved.
15-16-560 Reserved.
15-16-570 Reserved.
15-16-580 Reserved.
15-16-590 Reserved.
15-16-600 Hydraulically calculated sprinkler systems.
15-16-601 Residential sprinklers.
15-16-610 Retroactivity.
15-16-611 Carbon dioxide extinguishing systems.
PART 2. STANDARD FIRE EXTINGUISHERS (15-16-620 et seq.)
PART 3. STANDARD INSIDE STANDPIPE SYSTEMS (15-16-710 et seq.)
PART 4. STANDARD FIRE ALARM SYSTEMS (15-16-1200 et seq.)
PART 5. SPRINKLER SYSTEMS - ADDITIONAL PROVISIONS (15-16-1520 et seq.)
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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15-16-550  Reserved.
Editor's note – Coun. J. 10-30-96, p. 31216, § 1, repealed § 15-16-550, pertaining to fire pumps for open sprinkler system.
15-16-560  Reserved.
Editor's note – Coun. J. 10-30-96, p. 31216, § 1, repealed § 15-16-560, pertaining to arrangement of open sprinkler system.
15-16-570  Reserved.
Editor's note – Coun. J. 10-30-96, p. 31216, § 1, repealed § 15-16-570, pertaining to sprinkler heads for open sprinkler system.
15-16-580  Reserved.
Editor's note – Coun. J. 10-30-96, p. 31216, § 1, repealed § 15-16-580, pertaining to piping for open sprinkler system.
15-16-590  Reserved.
Editor's note – Coun. J. 10-30-96, p. 31216, § 1, repealed § 15-16-590, pertaining to siamese connections for open sprinkler system.
15-16-600  Hydraulically calculated sprinkler systems.
   Hydraulically calculated sprinkler systems shall be acceptable. Pipe friction losses shall be determined by the Hazen and Williams friction loss formula. The design area shall be the hydraulically most remote area. All sprinklers shall discharge at a flow rate at least equal to the design density times the area covered per head. The equivalent pipe length method shall be used for all fittings, valves, strainers and any other parts.
   The “C” factor in the Hazen and Williams formula shall be as follows:
 
Pipe
“C” Factor
Unlimited cast or ductile iron
100
Black steel (dry and pre-action systems)
100
Black steel (wet and deluge systems)
120
Galvanized
120
Cement lined cast or ductile iron
140
Copper
150
 
   The design densities and area shall not be less than the following:
 
Occupancy
Density
Area
Class A and B
.10 GPM square feet
1,500 square feet
Class C, D and E
.12
1,500 square feet
Class F, G and H with ceiling heights to 14 feet
.20
2,000 square feet
Class F, G and H with ceiling heights over 14 feet
.25
2,500 square feet
Class I and those occupancies listed in Section 15-16-240
.30
2,500 square feet
 
   For dry pipe sprinkler systems the area of application shall be increased 30 percent.
   In buildings with mixed occupancies the design density and area of application for the different occupancies shall be applied to each occupancy. In buildings of Class A, B, C, D, or E occupancy class those areas used for storage or building maintenance shop purposes shall be sprinkled on the basis of an industrial occupancy. Spaces used for heating, ventilation, and air conditioning equipment shall have a density of .15 GPM/square feet over an area of 1,500 square feet.
   Sprinkler systems using sprinklers with discharge orifices other than one-half inch in diameter shall be hydraulically calculated.
   A safety factor, not less than five pounds per square inch, shall be provided between the calculated pressure requirement of a system and the water pressure available in the city water main supplying a hydraulically calculated system. The available city water pressure shall be determined by a water flow test at the site of the building conducted within the previous 12 months. The factor of safety shall be applied to the city pressure which is available at a flow of 1,000 gallons per minute or the calculated flow required for the sprinkler system whichever is greater.
(Prior code §  91-44; Amend Coun. J. 10-30-96, p. 31216, § 1)
15-16-601  Residential sprinklers.
   Sprinkler systems installed in residential units pursuant to Section 13-160-050(m)(3) shall be installed as follows:
   (A)   Sprinklers shall be installed in all rooms of each dwelling unit except in bathrooms less than 55 square feet in area, closets less than 24 square feet open, carports and porches, and attics, crawl spaces or other concealed spaces not used or intended for storage or living spaces.
   Sprinklers shall be installed in entrance foyers and enclosed attached garages.
   (B)   Only sprinklers listed for residential occupancy shall be used.
   (C)   When the sprinkler system serves more than one dwelling unit and is equipped with a fire pump, the fire pump and all associated controls shall be located in a room which is accessible without passing through an individual dwelling unit. The room shall be identified as the fire pump room.
   A fire pump supplying a system which serves more than one dwelling unit shall be equipped with a bypass not less than one and one-half inches in diameter consisting of two control valves positioned on either side of a check valve.
   Each sprinkler system which serves more than one dwelling unit shall be equipped with a siamese connection conspicuously located on the street frontage. Such siamese connection may have one hose connection.
   A fire pump which supplies a sprinkler system which serves more than one dwelling unit shall be equipped with a test valve located on the discharge side of the pump.
   (D)   Pipe shall comply with Section 15-16-370.
(Added Coun. J. 10-30-96, p. 31216, § 1)
15-16-610  Retroactivity.
   The provisions of Sections 15-16-170 to 15-16-600, both inclusive, shall apply to all automatic sprinkler systems hereafter installed in any preordinance buildings, existing buildings and buildings hereafter constructed and shall also apply to any automatic sprinkler systems installed prior to the passage of this ordinance which were not installed in accordance with approved plans and permits; provided, however, that existing high-rise buildings subject to the requirements of Sections 13-196-205 or 13-196-206 may deviate from these provisions to the extent permitted by Section 13-196-207.
(Prior code §  91-44.1; Amend Coun. J. 10-30-96, p. 31216, § 1; Amend Coun. J. 12-15-04, p. 39962, § 8)
15-16-611  Carbon dioxide extinguishing systems.
   Carbon dioxide extinguishing systems required by this code shall be installed in accordance with N.F.P.A. Standard Number 12, Standard on Carbon Dioxide Extinguishing Systems (1993 edition). A local application of carbon dioxide system may be used to protect individual generators, transformers or equipment enclosures.
(Added Coun. J. 11-2-94, p. 58476; Amend Coun. J. 10-30-96, p. 31216, § 1)
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