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    Description

    Including character marks in dimension parts of the furniture, cabinet, and dimension industries offers an opportunity to increase lumber yield substantially. However, little quantitative knowledge exists as to how the incorporation of character marks in parts influences yield when processing lumber in a crosscut-first rough mill. Using computer simulation, this study researched the theoretical attainable yield increases in a crosscut first rough mill due to the incorporation of character marks in furniture parts. Also, the performance of the crosscut-first system was compared to the performance of a rip-first system studied earlier. When character marks up to 2 inches in diameter (3.1 in. Z) are allowed in dimension parts produced in a crosscut-first rough mill, yield increased by 11.0 percent (52.7% to 63.7%) and 5.1 percent (63.8% to 68.9%) for 2A Common lumber and 1 Common lumber, respectively. Compared to the previous rip-first mill study, crosscut-first yield trends were only found to be significantly different than rip-firs when allowing character mark sizes of less than 1 inch in diameter for 1 Common lumber, with rip-first showing greater yield improvements.

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    Citation

    Buehlmann, Urs; Wiedenbeck, Janice K.; Kline, E. Earl. 1999. Character-marked furniture: potential for lumber yield increase in crosscut-first rough mills. Forest Products Journal. 49(2): 65-72.

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https://www.fs.usda.gov/treesearch/pubs/22181