. Veneer recovery from old-growth coast Douglas-fir. Lumber Mensuration; Douglas fir; Veneers and veneering. O O o o o LL LU a ^ m d 3o QC LU O °- o z LU > LL. o cr < o CO 25 20 15 10 _ For blocks: = + diameter - diameter Block volume. For logs: = + - diameter' 10 20 30 40 DIAMETER (INCHES) 50 60 Figure 7.—The relationship of square-foot volume (3/8-inch basis) to cubic block and log volumes. The following example illustrates use of the data to estimate total production of dry, untrimmed veneer on a 3/8-inch basis: Assu
. Veneer recovery from old-growth coast Douglas-fir. Lumber Mensuration; Douglas fir; Veneers and veneering. O O o o o LL LU a ^ m d 3o QC LU O °- o z LU > LL. o cr < o CO 25 20 15 10 _ For blocks: = + diameter - diameter Block volume. For logs: = + - diameter' 10 20 30 40 DIAMETER (INCHES) 50 60 Figure 7.—The relationship of square-foot volume (3/8-inch basis) to cubic block and log volumes. The following example illustrates use of the data to estimate total production of dry, untrimmed veneer on a 3/8-inch basis: Assume the daily veneer block input to a mill is sorted into two diameter classes without regard to grade. Any number of sortings by size and grade could be used and the method of calculation would not change. Further, it is known that size class 1 of 300 blocks has an average di- ameter of 15 inches. Next, determine from Appendix B, table 33, that the aver- age cubic volume per 15-inch block is 17. 2 cubic feet (2, cubic feet t 132 blocks). From figure 7, note that the 15-inch blocks yielded 14. 1 square feet of veneer, 3/8-inch basis, per cubic foot of block volume. Three hundred blocks times cubic feet per block = 5,160 cubic feet; this volume times the square feet per cubic foot = an estimated yield of 72,756 square feet of dry, untrimmed veneer, 3/8-inch basis, from the blocks. Size class 2 of 75 blocks has an aver- age diameter of 45 inches. From Appendix B, table 33, the average cubic volume per 45-inch block was calculated to be cubic feet (1, 518. 55 cubic feet v 15 blocks). The 45-inch blocks in figure 7 yielded 16. 1 square feet of veneer, 3/8- inch basis, per cubic foot of volume. 9. 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, Paul H; Pacific Northwest Forest and Ra
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Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectdouglasfir
