Use the following guidelines to determine how to classify a check that occurs within a knot:
- A check in a knot is considered a defect if it extends outside the knot, OR if it is open more than 1/16”.
- If a check extends outside of a Spike Knot and into the board face, it is evaluated as an edge break, see para. 810 in the General Definitions and Instructions.
- If a check within any knot is open more than 1/16”, it is evaluated as a hole.
- For checks extending outside of knots that are located away from the edge (Typically Round and Oval Knots), check provisions for the corresponding grade of the piece would apply. For example, in the grade of Premium a check extending outside of a knot could be 10″ long, provided the opening of the check is open no greater than a medium check (1/32″), and the check does not extend through the edge of the board.