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• 01:17, 16 September 2025 Peter wood talk contribs created page Knot Area Ratio (Created page with "Knot Area Ratio (KAR) is a term used to describe the cross sectional area of a knot relative to the area surrounding, as a percentage. For grading purposes it is an estimate, calculated by adding the width of a knot on the top surface of a piece of timber, added to the width that knot on the bottom of the surface and then divided by 2.") Tag: Visual edit