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How do you read a Doyle log scale?

Read the right side of the log scale ruler at the highest point at which the trunk is approximately 6 to 10 inches in diameter. The numbered lines represent full logs, 16 feet long, while the dashes without numbers between the numerals represent 8-feet-long half logs.

How many board feet are in a tree?

For the sake of discussion, consider an average mature fir or pine tree with a height of 80' and a diameter of 2'. Using the calculation detailed above, you will find that its lumber yield is about 754 board feet.

How do you calculate log wood?

Volume of Wood The cubic feet, or volume, of a cylindrical log is given by the volume of a cylinder V=\u03c0hr2. A log with radius of 2 feet and height of 10 feet would have a volume of about 125.66 cubic feet (or ft3).

What is the Doyle scale?

The Doyle scale is the standard by which hardwood lumber is bought and sold. It estimates large or medium logs very close to the actual number but underestimates in smaller logs. Because it comes in below the price, this is the scale most log buyers want to use.

What is the International 1/4 log rule?

The international 1/4-inch log rule determines the volume of lumber from a log, accounting for the taper that exists in all logs, saw kerf (or the loss of wood as sawdust) and wood removed on the outside of the logs for slabs.

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What is the formula for Doyle log scale?

The Doyle Rule (Table 1) is the most widely used rule, especially on private timber in the east and south. The formula is simple and easy to remember. This formula says to subtract four inches from the diameter for slabs and edgings, square the result, and adjust for log length.

How do you determine board feet in a log?

The board-foot content of any board may be determined by multiplying the length by the width by the thickness, all expressed in inches, and dividing by 144 cubic inches. The board foot is also the most common volume measure for trees and logs to be used for lumber and veneer.

What is Doyle log rule?

Doyle Log Rule This rule estimates the volume based on log length, diameter, slabs, edgings, shrinkage and production of sawdust. The allowance for slabs and edgings is too large for small logs and is too small for large logs.

How do you use a Doyle scale?

0:18 5:33 With the numbers on the farthest end of your stick most scaling sticks use the small end of the logMoreWith the numbers on the farthest end of your stick most scaling sticks use the small end of the log as the diameter. This log is eight feet long so she's going to find the eight on her scaling stick.

How is Scribner calculated?

The Scribner Decimal C is used in the Midwestern and Northern regions of North America. It was published in 1945 in the University of Minnesota and uses the help of a table. Formula: (0.79*D² \u2013 2D \u2013 4) * L/16 = FBM, rounded to the nearest 10 FBM (313 ~ 310, 317 ~ 320 etc.)

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