Section 9630.

Cal. Health and Safety Code - HSC § 9630.
in effect
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Floor slabs placed on earth shall be constructed of reinforced concrete designed by a licensed structural or civil engineer to include control joints at appropriate intervals to minimize cracks as well as appropriate vapor and moisture barriers as specified by a licensed geotechnical engineer.
Source: CA Legislative Counsel Bulk DataURL: https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zipFetched: 6/27/2026

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