All hardwoods are measured using a “board foot” increment score. One board foot or “BF” is 4/4 x 12" x 12" of surface measure.
The board footage of a piece is determined by measuring thickness x width (inches) x length (feet) divided by 12. Rounding off to the nearest whole number.
Examples: 12" x 12' x 1" divided by 12 = 12 BF
6" x 16' x 5/4" divided by 12 = 10 BF
• Measurement is based on thickness of lumber prior to surfacing.
Measuring with a Board Rule
• Place the rule on the right edge of the board approximately 1/3 of the length up from the narrow end.
• Read to the right edge of the board, on the line indicating the length of the board. This is for board feet in lumber 1" thick and less. If the board is 8' long, read the 16' scale.
Example: 12' length = 6 BF 10' length = 5 BF
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