For AI agents: read the machine-readable documentation index at /llms.txt or the single-file full reference at /llms-full.txt.

§ 18-28-506.3.12 — Fire-resistive access opening

Municipal Code of Chicago (2026 S-74, current through Council Journal of June 17, 2026) · Municipal Code of Chicago § 18-28-506.3.12

Corpus is an independent public-information project, not the official City of Chicago website. Stable reference URL

18-28-506.3.12 Fire-resistive access opening.

Where cleanout openings are located in ducts within a fireresistance-rated enclosure, access openings shall be provided in the enclosure at each cleanout point. Access openings shall be equipped with tight-fitting sliding or hinged doors that are equal in fire-resistive protection to that of the shaft or enclosure. An approved sign shall be placed on access opening panels with wording as follows: "ACCESS PANEL. DO NOT OBSTRUCT."