Planks with spike knots should be rejected. On the edges there should be no knots larger than 10 mm or 3⁄ 8” in the middle third of the plank. For 2” x 12” planks the maximum is 60 mm or 2 3⁄ 8”. The maximum allowable size for the wide face of a 2” x 10” plank is 50 mm or 1 7⁄ 8”.
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