. Lumber recovery from ponderosa pine in the Black Hills, South Dakota. Lumber; Ponderosa pine South Dakota; Ponderosa pine Black Hills (S; D; and Wyo; ). Cubic Recovery Percent Cubic recovery percent can be based on rough-green or surfaced-dry lumber. Both are related to diameter and are shown in table 2 and figure 1. The difference between the recovery of green and dry lumber is the volume lost because of shrinkage and planer shavings. The percentages of lumber, planer shavings, and sawdust increase slightly with increasing log diameter, while the percentage available for chips decreases. Th
. Lumber recovery from ponderosa pine in the Black Hills, South Dakota. Lumber; Ponderosa pine South Dakota; Ponderosa pine Black Hills (S; D; and Wyo; ). Cubic Recovery Percent Cubic recovery percent can be based on rough-green or surfaced-dry lumber. Both are related to diameter and are shown in table 2 and figure 1. The difference between the recovery of green and dry lumber is the volume lost because of shrinkage and planer shavings. The percentages of lumber, planer shavings, and sawdust increase slightly with increasing log diameter, while the percentage available for chips decreases. These recovery percents are based on the gross cubic foot (CF) volume of logs. Table 2—Estimated percent of cubic volume for products manufactured from ponderosa pine logs in the Black Hills Lumber Rough- Surfaced Shrinkage Scaling recovery green dry and planer Chippable diameter factor lumber lumber shaving Sawdust volume Inches BF/CF -- Percent 5 41 25 16 9 50 6 41 25 16 9 50 7 43 26 17 9 48 8 44 28 16 9 47 9 46 29 17 10 44 10 47 30 17 10 43 11 49 31 18 10 41 12 50 32 18 10 40 13 51 33 18 10 39 14 52 34 18 10 38 15 53 35 18 11 36 16 53 35 18 11 36 17 54 36 18 11 35 18 55 37 18 11 34 19 55 37 18 11 34 100 r 0) 80 O o a "D O >» -O 0) E o > 60 40 20. Chippable volume Sawdust Shrinkage and planer shavings Surface-dry lumber Rough-green Number 0 5 10 15 Small-end diameter (inches) Figure 1.—Volume of products recovered expressed as a per- centage of gross cubic foot volume of logs by diameter This represents the combined recovery of mill-length logs from two sawmills cutting 1-inch-thick lumber. 4. 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 Plank, Marlin E. cn; Pacific Northwest Forest and Range Experiment Station (Portland, Or. ) cn
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