Scribner decimal log rule
The total scale is obtained by multiplying the figures in this table by 10. Thus the contents of a 6-inch 8-foot log are given as 0.5, so the total scale is 5 board feet. A 30-inch 16-foot log is given as 66, or a total scale of 660 board feet.
U. S. Forest Service Log-Scaling Directions
Unless timber is sold on the basis of an estimate, it must be scaled, counted, or measured before it is removed from the cutting area, or from the place agreed upon for the scaling, the counting, or the measuring.