US lawCaliforniaStatutesCode hscDivision 8Part 5Chapter 5Article 29646Cal. HSC § 9646Cal. HSC § 9646Last amended: 1993Year: 2025Length: 25 wordsOfficial source Roofs shall be constructed of cast-in-place reinforced concrete, and any roof covering shall be “Fire Retardant” in conformity with the requirements of type I construction.PreviousCal. HSC § 9645NextCal. HSC § 9647