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Fire-resistive separation.

Municipal Code of Chicago § 15-28-620
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15-28-620 Fire-resistive separation. When the quantity of loose highly flammable materials stored exceeds 100 cubic feet, rooms separating such area from every other part of the building shall be required. Such rooms shall have separations providing the following fire-resistive ratings: Quantity of Highly Flammable Materials | Fire-resistive Rating 100.1 to 500 cubic feet | 1-hour 500.1 to 2,500 cubic feet | 2-hour Exceeding 2,500 cubic feet | 4-hour Baled storage rooms shall comply with the following: Quantity of Highly Flammable Materials | Fire-resistive Rating 500 to 2,500 cubic feet | 1-hour 2,500.1 to 5,000 cubic feet | 2-hour Exceeding 5,000 cubic feet | 4-hour (Prior code § 92-51)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2679886Fetched: 10/24/2026

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15-28-620 | Corpus