. Veneer recovery from second-growth Douglas-fir. Veneers and veneering; Douglas fir. the percent of A through C grade veneer was consistently higher than for blocks peeled l/6-inch, regardless of diameter. The difference was 9. 9 percent for block grade No. 2 Sawmill and 14. 2 percent for block grade No. 3 Sawmill. Statisti- cally, these differences were highly sig- nificant. Appendix 3 contains the summary by diameter on which this analysis was based. Block recovery Recov- ery ratio is square feet of veneer on a 3/8-inch basis per board foot of net Scrib- ner scale. The recovery ra
. Veneer recovery from second-growth Douglas-fir. Veneers and veneering; Douglas fir. the percent of A through C grade veneer was consistently higher than for blocks peeled l/6-inch, regardless of diameter. The difference was 9. 9 percent for block grade No. 2 Sawmill and 14. 2 percent for block grade No. 3 Sawmill. Statisti- cally, these differences were highly sig- nificant. Appendix 3 contains the summary by diameter on which this analysis was based. Block recovery Recov- ery ratio is square feet of veneer on a 3/8-inch basis per board foot of net Scrib- ner scale. The recovery ratio of all non- cull blocks (table 4) is lower for l/10-inch veneer () than for 1/6-inch veneer (). Regression analysis showed there was a significant correlation between diameter and recovery ratio (fig. 3) and that the 1/10-inch recovery ratio was lower for all diameters. This difference is highly significant. Appendix 4 contains the basic data by grade and diameter class. Cubic volumes of veneer, reject veneer, core, and residual were analyzed as a percent of block cubic volume for both peeling thicknesses (figs. 4 and 5). The percent of the block cubic volume (table 4) varied with diameter for veneer, reject veneer, and core. The residual component stayed constant for all diameters. RECOVERY PERCENT BO GRADE D AND BETTER VENEER BLOCKS PEELED BOTH THICKNESSES BLOCKS PEELED 1/10-INCH 5 10 15 20 25 30 DIAMETER (INCHES) Figure cubic recovery as a percent of cubic volume. RECOVERY RATIO 3 , BLOCKS PEELED 1/6-INCH. _i I i i i i I i i i i I i i i i I 5 10 15 20 25 30 DIAMETER (INCHES) Figure 3.—Recovery ratio, square feet of veneer (3/8-inch basis) per board foot of net Scribner block scale by diameter. PERCENT 40 r- RESIDUAL \\ 30 - 10. 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
Size: 2626px × 952px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectdouglasfir
