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Board feet - Definition |
| Related Words: Areopagus, L, R, Sanhedrin, Accommodation, Allotment, Ambo, Apron, Assembly, Association, Back, Backstage |
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The board foot is a specialized unit of volume for measuring lumber in the United States. It is the amount of wood in a 12-inch long 1-inch-by-12-inch board, or the equivalent. Unfortunately, it is not truly a measure of volume, due to nominal and actual measures used in the lumber business. In addition, the definition is different for hardwood and softwood.
To be exact, for hardwood, the board footage is defined as:
BF = SM × T
where
- SM = L × W / 12, rounded to the nearest whole number
- L is nominal length in feet, truncated (rounded down) to the nearest foot
- W is actual width in inches
- T is the nominal thickness in inches
For softwood:
BF = L × W × T / 12, rounded to the nearest hundredth of a board foot
where
- L is nominal length in feet, truncated to the nearest even foot
- W is nominal length in inches
- T is nominal thickness in inches
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