Hardwood log grades and lumber grade yields for factory lumber
Figure 2 illustrates the results of the option afforded the graders by producing lumber that can be graded tinder either the Dimension or Selects and Factory Lumber (e.
Conversely, appearance-grade Selects and Factory lumber do not permit the presence of worms, wormholes, and stain, so flitches that contain these defects should not be used to manufacture appearance-grade products.
Both dimension and Factory lumber were produced in this study.
A large volume of random width and random length hardwood factory lumber
produced in Quebec is used in furniture, cabinetry, and flooring industries.
Because of the three-dimensional similarities between a cant and a log, a simple cant grading technique is proposed that draws on log grading criteria used by the Forest Service Standard Grades for Hardwood Factory Lumber Logs (Rast et al.
Estimate interior unsound wood volume deductions present at the ends of the cant (CED) using the methods for interior deductions described in the Forest Service Standard Grades for Hardwood Factory Lumber Logs (Rast 1973).
A large volume of random width and standard length hardwood factory lumber
produced in Quebec is used in the furniture, cabinetry, and flooring industries.
Log grade estimates were based on the Factory Lumber
Log Grading Rules (grade 1 = highest grade; grade 2 = middle grade; and grade 3 = lowest grade) (Kenna 1981).