Winders.
Municipal Code of Chicago § 14X-5-505.9.1.2
in effect14X-5-505.9.1.2 Winders.
Winders must have a minimum tread depth of 9 inches (229 mm) at a point 18 inches (457 mm) from the narrowest edge.
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2675960Fetched: 10/24/2026
