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The Blodgett Foot Rule formula to calculate volume is:
\[ \text{V} = \frac{D^2}{16^2} \times L \]
The Blodgett Foot Rule, also known as the New Hampshire cubic foot, calculates the volume of a log in board feet. The diameter is measured mid-length with calipers, and double the bark thickness is deducted.
Let's assume the following values:
Using the formula:
\[ \text{V} = \frac{20^2}{16^2} \times 16 = 25 \text{ Bl ft} \]
| Diameter (inches) | Length (feet) | Blodgett Feet (Bl ft) |
|---|---|---|
| 6 | 16 | 2.25 |
| 8 | 16 | 4.00 |
| 10 | 16 | 6.25 |
| 12 | 16 | 9.00 |
| 14 | 16 | 12.25 |
| 16 | 16 | 16.00 |
| 18 | 16 | 20.25 |
| 20 | 16 | 25.00 |
| 22 | 16 | 30.25 |
| 24 | 16 | 36.00 |
| 26 | 16 | 42.25 |
| 28 | 16 | 49.00 |
| 30 | 16 | 56.25 |
| 32 | 16 | 64.00 |
| 34 | 16 | 72.25 |
| 36 | 16 | 81.00 |
