. Veneer recovery from old-growth coast Douglas-fir. Lumber Mensuration; Douglas fir; Veneers and veneering. 50. 0 I I I I I I 1 0 10 20 30 40 50 60 DIAMETER (INCHES) Figure 4.—Relationship of percent defect to diameter for woods-length logs and veneer blocks. Average scaling defect percentage was and , respectively, for woods- length logs and peeler blocks. Defect percentage was highest for No. 3 Sawmill grade of the woods-length logs and for No. 1 Peeler grade of the individual blocks. VENEER RECOVERY RATIO The range in veneer recovery vol- umes and ratios^./ can be compared by log
. Veneer recovery from old-growth coast Douglas-fir. Lumber Mensuration; Douglas fir; Veneers and veneering. 50. 0 I I I I I I 1 0 10 20 30 40 50 60 DIAMETER (INCHES) Figure 4.—Relationship of percent defect to diameter for woods-length logs and veneer blocks. Average scaling defect percentage was and , respectively, for woods- length logs and peeler blocks. Defect percentage was highest for No. 3 Sawmill grade of the woods-length logs and for No. 1 Peeler grade of the individual blocks. VENEER RECOVERY RATIO The range in veneer recovery vol- umes and ratios^./ can be compared by log =J The reader should note that veneer recovery ratio is based on the net Scribner board- foot scale of the log or block and the volume in square feet, 3/8-inch basis, of dry, untrimmed veneer produced from the log or block. The ply- wood industry normally expresses recovery ratio based on the trimmed panel basis. A further reduction of 16 percent of untrimmed (Hunt and Woodfin 1970) will approximate the trimmed basis. grade and diameter class using Appendix A, tables 13 to 19, and Appendix B, tables 34 to 40. Also, figure 5 shows the relationship of the recovery ratios to scaling diameter for all log grades com- bined. The prediction equations developed by regression analysis are shown with the curves. CUBIC RECOVERY PERCENTAGE The relationship of the cubic re- covery ratio to block and log scaling diameter for all data combined is shown in figure 6. Figure 7 shows the number of square feet of veneer (3/8-inch basis) that are produced per cubic foot of log or block volume. There is no significant difference between the curves for block and woods-length logs. A mill having a cubic estimate of log input would use figure 6 to estimate recovery volume. 7. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lane, P
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