Rating for Subfloor when Applying CSA O325 Table 9.23.14.5.B. Forming Part of Sentences 9.23.14.5.(1) and 9.23.15.7.(1) Table 9.23.14.5.B Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only. Similar articles Subflooring Required Subflooring Material Standards Subflooring Edge Support Floor Performance