18-29-903.1 Main vent required.

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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

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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18-29-903.1 Main vent required.

Every sanitary drainage system receiving the discharge of a water closet shall have a main vent that is either a vent stack or a stack vent. Such vent shall run undiminished in size and as directly as possible from the building drain through to the open air above the roof.

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