Principal log scaling rule for western USA softwoods. More accurate than Doyle for large-diameter logs. Scribner Decimal C is the official USFS standard for national forest timber sales.
Diagram-Based Volume Calculator
| Log Rule | BF per Log | Total BF | vs Scribner |
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Developed by J.M. Scribner in 1846 using diagram-based cross-section drawings. The Scribner Decimal C variant is the official US Forest Service standard, rounding volumes to the nearest 10 BF. More accurate than Doyle for large logs and preferred for Pacific Northwest softwoods including Douglas Fir and Redwood.