Fastening of Wood Furring
(1) Furring shall be fastened to the framing or to wood blocks with not less than 51 mm nails.
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Article 9.29.3.2. Ontario Regulation 332/12 Building Code, Information published by oncodes.ca for educational purposes only.
Note : The term furring is used to describe the use of wooden strips or beams to create a true plane on which to attach or strap flat surface materials.