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Municipal Code of Chicago
MUNICIPAL CODE OF CHICAGO
TITLE 1 GENERAL PROVISIONS
TITLE 2 CITY GOVERNMENT AND ADMINISTRATION
TITLE 3 REVENUE AND FINANCE
TITLE 4 BUSINESSES, OCCUPATIONS AND CONSUMER PROTECTION
TITLE 5 HOUSING AND ECONOMIC DEVELOPMENT
TITLE 6 HUMAN RIGHTS*
TITLE 7 HEALTH AND SAFETY
TITLE 8 OFFENSES AFFECTING PUBLIC PEACE, MORALS AND WELFARE
TITLE 9 VEHICLES, TRAFFIC AND RAIL TRANSPORTATION
TITLE 10 STREETS, PUBLIC WAYS, PARKS, AIRPORTS AND HARBORS
TITLE 11 UTILITIES AND ENVIRONMENTAL PROTECTION
TITLE 12 RESERVED
TITLE 13 BUILDINGS AND CONSTRUCTION
TITLE 14 RESERVED*
TITLE 14A ADMINISTRATIVE PROVISIONS OF THE CHICAGO CONSTRUCTION CODES*
TITLE 14B BUILDING CODE*
TITLE 14C CONVEYANCE DEVICE CODE*
TITLE 14E ELECTRICAL CODE*
TITLE 14F FIRE PREVENTION CODE*
TITLE 14G FUEL GAS CODE*
TITLE 14M MECHANICAL CODE*
TITLE 14N 2022 ENERGY TRANSFORMATION CODE*
TITLE 14P PLUMBING CODE*
TITLE 14R BUILDING REHABILITATION CODE*
TITLE 14X MINIMUM REQUIREMENTS FOR EXISTING BUILDINGS*
TITLE 15 FIRE PREVENTION
TITLE 16 LAND USE
TITLE 17 CHICAGO ZONING ORDINANCE
TITLE 18 BUILDING INFRASTRUCTURE
APPENDIX TO THE MUNICIPAL CODE OF CHICAGO (RESERVED)*
TABLES
Chicago Zoning Ordinance and Land Use Ordinance
CHICAGO ZONING ORDINANCE AND LAND USE ORDINANCE
TITLE 16 LAND USE
TITLE 17 CHICAGO ZONING ORDINANCE
18-28-803.9 Chimney connector construction.
   Chimney connectors for low-heat appliances shall be made of sheet steel pipe that is resistant to corrosion and heat not less than that required for galvanized steel as specified in Table 18-28-803.9(1). Connectors for medium-heat appliances and high-heat appliances shall be of sheet steel not less than the thickness specified in Table 18-28-803.9(2).
Table 18-28-803.9(1)
Minimum Chimney Connector Thickness for Low- Heat Appliances
 
Diameter of Connector (inches)
Minimum Nominal Thickness (Galvanized) (inches)
5 and smaller
0.022 (No. 26 Gauge)
Larger than 5 and up to 10
0.028 (No. 24 Gauge)
Larger than 10 and up to 16
0.034 (No. 22 Gauge)
Larger than 16
0.064 (No. 16 Gauge)
 
For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm 2 .
Table 18-28-803.9(2)
Minimum Chimney Connector Thickness for Medium- and High-Heat Appliances
 
Area
(square inches)
Equivalent Round Diameter
(inches)
Minimum Nominal Thickness
(inches)
0 – 154
0 – 14
0.060
(No. 16 Gauge)
155 – 201
15 – 16
0.075
(No. 14 Gauge)
202 – 254
17 – 18
0.105
(No. 12 Gauge)
Greater than 254
Greater than 18
0.135
(No. 10 Gauge)
 
For SI: 1 inch = 25.4 mm, 1 square inch = 645.16 mm 2 .

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