Scribner Boardfoot Log Volume
The most common diagram rule is the Scribner log rule. The Scribner
was proposed by J. M. Scribner and first published in 1846 (Husch et al.
1993). It assumes a 1/4 inch kerf and 1 inch boards probably not
less that 8 inches wide. (Chapman and Meyer, 1949). The Scribner
log rules are for logs with small end diameters from 12 to 44 inches and
10 to 24 feet in length.
Bruce and Schumacher (1950) fit a regression equation to the original
table an produce the following equation:
$$ V = (0.79D^2 - 2D - 4)\frac{L}{16} $$
where \( V \) is the Scribner board foot volume, \( D \) is the small end diameter n inches and \( L \) is the log length in feet.
Example
- Imperial Units
- dia small = 10 in inches
- L = 16 feet
- Answer = 55 board feet
- dia small = 28 in inches
- L = 16 feet
- Answer = 559.4 board feet
Board feet is a imperial units only system.
Code
This code is stored in my Github.com\larsendr site. These are direct links to the raw code.
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