Lumber Yields by the New Timber Cruising Log Grades for Old-Growth Coast Douglas-Fir

摘要

Lumber grades yields and recovery ratios obtained for old-growth Coast Douglas-fir logs are presented for the new timber cruising log grades. Lumber yield information is based on nearly 5,000 logs processed through 10 sawmills in Washington, Oregon, and California. Curve relationships are shown for lumber grade recovery over diameter, scale recovery ratio over diameter, lumber recovery factor over diameter, and net Scribner and gross cubic scale defect over diameter for the four log grades.