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Type II hood materials.

Municipal Code of Chicago § 18-28-507.5
in effect
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18-28-507.5 Type II hood materials. Type II hoods shall be constructed of steel not less than 0.030 inch (0.76 mm) (No. 22 Gauge) in thickness, stainless steel not less than 0.024 inch (0.61 mm) (No. 24 Gauge) in thickness, copper sheets weighing not less than 24 ounces per square foot (7.3 kg/m 2 ), or of other approved material and gauge.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2687360Fetched: 10/24/2026

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18-28-507.5 | Corpus