Black knots larger than a quarter dollar are not acceptable. Fingers and rabbet ears must be free of knots. Knots with cracks going all the way through, as long as the knot is solid are acceptable. Small knots in the hand hold are acceptable, unless in the thin part of hand hold. Black edge knots or planer skips with ½ (1.27 cm) the thickness or less can be missing from the top or bottom of the board.
With the 5 5/8" Unassembled Super Commercial 10 Frame use 5 3/8" Frames and 4 3/4" Foundation.