Wood Furring Size and Spacing Wood furring for the attachment of wall and ceiling finishes shall conform to Table 9.29.3.1. Table 9.29.3.1.Size and Spacing of Furring Forming Part of Sentence 9.29.3.1.(1) Article and Table 9.29.3.1 Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only