The number of cutting units available in the cuttings that were visually laid out above is now calculated. To calculate the number of units in each cutting, the width in inches and fractions of an inch is multiplied by the length in feet and fractions of a foot. The number of units for each cutting is totaled. If the total exceeds the number required, the board meets the requirement for the cutting units needed. If it does not, the next lower grade is considered.
Walnut is one of our most valuable species, and it is often purchased in small quantities.
Therefore, every board is likely to be closely scrutinized. The grades for walnut and butternut vary substantially from the standard grades. FAS will admit pieces 6 and 7 feet long, as compared to the standard 8-foot length. The minimum width for FAS is 5 inches, as compared to the standard 6 inches. The minimum size cuttings are also smaller, and the number of cuttings is increased in all of the grades.