§ 18-29-402.3 — Sheet copper
Municipal Code of Chicago (2026 S-74, current through Council Journal of June 17, 2026) · Municipal Code of Chicago § 18-29-402.3
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18-29-402.3 Sheet copper.
Sheet copper for general applications, shower pans or flashing of fixtures shall conform to ASTM B152 and shall weigh not less than 12 ounces per square foot (3.7 kg/m 2 ).