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Scribner Log Rule Calculator

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J. M. Scribner developed the Scribner log rule in 1846.

The Scribner Rule is a diagram rule because the original numbers were derived by fitting boards into perfect circles representing the ends of logs.

Length of Log in Feet ft
DIB Log Small End in Inches inch
Diameter Measured Inside Bark = DIB

Results:

Board Feet: bf

Calculation

  1. the length of the log in measured in feet
  2. small end diameter of the log measured in inches

Result

  1. the volume of the log in board feet


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