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The number of defects found on a log, very much like lumber determines the grade of the log.
Veneer logs are as close to perfect as you'll find. They must be clear and straight, as the veneer mill will spin the veneer off the log much like paper towels coming off a roll. The more defects the log has, the lower the grade and consequently, its value. The footage of the log is determined using a Doyle Log Rule. This is sort of a special yardstick that allows the log grader to quickly and accurately calculate the footage of the log. This is important because logs are bought by the "thousand board feet" or MBF. Logs are always scaled from the narrow end, inside the bark.
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