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CBC Title 24 Part 8: Interior Finishes

Updated Apr 3, 2026

Interior finish requirements and flame spread ratings.

This section covers technical requirements and specifications for CBC Title 24 Part 8: Interior Finishes. The standards establish minimum requirements for materials, construction methods, and design practices to ensure safety, structural integrity, and compliance with local jurisdictions. Compliance with these requirements is mandatory for all construction projects within the applicable jurisdiction. Designers, contractors, and inspectors must be thoroughly familiar with all applicable sections and amendments.

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RELATED KNOWLEDGE

IBC 903.2.1 — Group A Occupancies (Sprinkler Requirements)

Automatic sprinkler system required throughout buildings with Group A occupancy where fire area exceeds 5,000 square feet, or overall building area exceeds 12,000 square feet, or occupant load of the fire area exceeds 300.

IBC 903.2.7 — Group M Occupancies (Retail Sprinkler Requirements)

Automatic sprinkler system required in Group M (mercantile) occupancies where fire area exceeds 12,000 square feet or building is more than three stories above grade.

IBC 903.2.11.3 — Buildings 55 Feet or More in Height

Automatic sprinkler system required throughout buildings with a floor level having an occupant load of 30 or more that is located 55 feet or more above the lowest level of fire department vehicle access.

IBC 1015.1 — Exit and Exit Access Doorways Required

Two exits or exit access doorways required from any space where occupant load exceeds the table values. Spaces with occupant load exceeding 500 require a minimum of 3 exits. Spaces exceeding 1,000 require 4 exits.

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IBC Table 601 — Fire-Resistance Rating Requirements

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