Rating for Roof Sheathing When Applying CSA O325 Table 9.23.15.7.B. Forming Part of Sentence 9.23.15.7.(2) Table 9.23.15.7.B. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only. Similar articles Moisture Content (Lumber) End Bearing Length of Joists and Rafters Securing of Tabs Asphalt Shingles on Slopes of 1 in 3 or Greater Starter Strip Asphalt Shingles on Slopes of Less Than 1 in 3