§ 18-29-902.3 — Sheet lead
Municipal Code of Chicago (2026 S-74, current through Council Journal of June 17, 2026) · Municipal Code of Chicago § 18-29-902.3
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18-29-902.3 Sheet lead.
Sheet lead for vent pipe flashings shall weigh not less than 3 pounds per square foot (15 kg/m 2 ) for field-constructed flashings and not less than 2 1/2 pounds per square foot (12 kg/m 2 ) for prefabricated flashings.