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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
DIVISION 10 - MEANS OF EGRESS
CHAPTER 13-160 EXIT REQUIREMENTS
13-160-010 General provisions.
13-160-020 Definitions.
13-160-030 Exit types - Requirements.
13-160-040 Exit types - Above or below grade.
13-160-050 Minimum number of exits.
13-160-060 Arrangement and location of exits.
13-160-070 Obstructions prohibited.
13-160-080 Exits - Distance requirements.
13-160-090 Exits in certain units to discharge in line of travel.
13-160-100 Continuous means of exit required.
13-160-110 Travel distance to exits.
13-160-120 Travel distance - Defined.
13-160-130 Travel distance - Measurement.
13-160-140 Maximum travel distances.
13-160-150 Maximum travel distances - Permitted increases.
13-160-160 Maximum distance from end of corridor.
13-160-170 Width of exits.
13-160-180 Occupancy content.
13-160-190 Unit of exit width.
13-160-200 Measurement of width.
13-160-210 Capacity of exits.
13-160-220 Minimum width of exits.
13-160-230 Outside exits.
13-160-240 Doors.
13-160-250 Swing of doors - Exceptions.
13-160-260 Hardware.
13-160-261 External exit doors - Electronic locking system.
13-160-269 Electromagnetic locking devices.
13-160-270 Revolving doors.
13-160-280 Entrance and vestibule doors for handicapped.
13-160-290 Stairways.
13-160-300 Stairways - Treads and risers.
13-160-310 Stairways - Landings.
13-160-320 Stairways - Handrails.
13-160-330 Stairways - Construction.
13-160-340 Stairways - Enclosures.
13-160-350 Stairways - Headroom.
13-160-360 Smokeproof towers.
13-160-370 Smokeproof towers - Stairway enclosures.
13-160-380 Smokeproof towers - Vestibules and balconies.
13-160-390 Smokeproof towers - Fire shields.
13-160-400 Smokeproof towers - Opening protectives.
13-160-410 Smokeproof towers - Exterior exits.
13-160-420 Smokeproof towers - Interior smoke shafts.
13-160-430 Ramps.
13-160-440 Ramps - Grades.
13-160-450 Ramps - Handrails.
13-160-460 Ramps - Nonslip surfaces.
13-160-470 Exterior and interior ramps for handicapped.
13-160-480 Horizontal exits.
13-160-490 Horizontal exits - Floor area.
13-160-500 Horizontal exits - Doors.
13-160-510 Horizontal exits - Bridges and balconies.
13-160-520 Escalators.
13-160-530 Escalators - Compliance with interior stairway requirements.
13-160-540 Escalators - Type.
13-160-550 Escalators - Rise.
13-160-560 Escalators - Angle of inclination.
13-160-570 Escalators - Protection.
13-160-580 Exterior stairs.
13-160-590 Exterior stairs - Treads and risers.
13-160-600 Exterior stairs - Opening protectives.
13-160-610 Exterior stairs - Permanent.
13-160-620 Exterior stairs - Construction.
13-160-630 Fire escapes.
13-160-640 Fire escapes - Stairways.
13-160-650 Fire escapes - Other exits.
13-160-660 Exit lighting.
13-160-670 Exit lighting - Intensity.
13-160-680 Lighting during performances.
13-160-690 Emergency lighting.
13-160-700 Exit, stairway, fire escape and directional signs.
13-160-710 Directional signs - Where required.
13-160-720 Directional signs - Fixture requirements.
13-160-730 Directional signs - Illumination.
13-160-740 Directional signs - Location.
13-160-750 Directional signs - Lettering.
13-160-760 Reserved.
13-160-770 Directional signs - Normal illumination defined.
13-160-780 Enforcement of Sections 13-160-710 through 13-160-770.
13-160-790 Reserved.
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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13-160-610  Exterior stairs – Permanent.
   Exterior stairs shall be built permanently to the ground without counter-balanced or movable sections.
(Prior code § 67-15.3)
13-160-620  Exterior stairs – Construction.
   Exterior stairs shall be constructed entirely of non-combustible materials in the following buildings:
   (a)   Buildings of Types I-A, I-B, I-C and II construction;
   (b)   Institutional units.
(Prior code § 67-15.4)
13-160-630  Fire escapes.
   Fire escapes, when permitted, shall comply with the provisions of Sections 13-160-640 and 13-160-650.
   Fire escapes shall not be permitted except where such exits now serve existing buildings and except as approved by the building commissioner for existing buildings where additional exits are necessary and conditions do not permit the use of more adequate exit facilities.
(Prior code § 67-16; Amend Coun. J. 9-13-89, p. 4604; Amend Coun. J. 3-5-03, p. 104990, § 34; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1)
13-160-640  Fire escapes – Stairways.
   Fire escape stairways shall conform, insofar as possible, with the requirements for interior stairways in Section 13-160-290, except as otherwise required in this section.
   (a)   The width of a fire escape stairway shall be not less than 24 inches. The maximum riser shall be eight inches, and the minimum width of tread, exclusive of nosing, shall be nine inches.
   (b)   Location.
      (1)   Every fire escape stairway shall be located outside the building on a wall facing a public way or an open space having an unobstructed exit to a public way at grade.
   (c)   Counterbalanced sections. A counterbalanced section may be used for the bottom flight of any fire escape stairway and shall be used when such fire escape stairway projects over a public way. The vertical height of a counterbalanced section shall not exceed 14 feet and have a minimum of 12 feet except when a counterbalanced section is used over any public way where the loading, unloading or passage of trucks or large semitrailers is necessary, the minimum height shall be not less than 14 feet.
   (d)   Access to a fire escape stairway from the interior of a building shall be through a doorway flush with the floor and not less than 30 inches wide, except that access to a fire escape stairway serving not more than 20 persons may be through a window having an openable area not less than 30 inches wide by 36 inches high, located not more than 24 inches above the floor.
   (e)   Construction.
      (1)   Fire escape stairways shall be constructed entirely of noncombustible materials.
      (2)   Fire escape stairways shall be designed to support a live load of not less than 100 pounds per square foot.
      (3)   Stair treads and landings shall be so constructed as to prevent accumulation of snow or ice, but the maximum dimension of any opening, through such treads, landings or floors shall not exceed one and one-fourth inches.
      (4)   Metal mesh or guard rails not less than 42 inches high shall be provided on all unenclosed sides of fire escape stairways.
      (5)   All metal structural members shall be adequately protected against corrosion and shall be scraped and painted at least once every three years.
   (f)   Protection. All exterior wall openings within ten feet of a fire escape stairway shall be protected as provided in Section 15-8-070.
(Prior code § 67-16.1)
13-160-650  Fire escapes – Other exits.
   Other means of fire escape exit, including ladders or other devices, shall comply with such requirements as the building commissioner shall prescribe. All metal structural members shall be adequately protected against corrosion and shall be scraped and painted at least once every three years.
(Prior code § 67-16.2; Amend Coun. J. 9-13-89, p. 4604; Amend Coun. J. 3-5-03, p. 104990, § 34; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1)
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