Section 7103 Of Article 1. Floors And Walls From California Labor Code >> Division 5. >> Part 3. >> Chapter 1. >> Article 1.

. Every building having wooden floors other than a steel frame building shall have the underflooring, if double flooring is to be used, laid on each floor within the time prescribed above for reinforced concrete floors. Where single wooden floors are to be used, each floor shall be planked over within the time prescribed above for reinforced concrete floors.