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weight_volume_relationships
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weight_volume_relationships [2012/04/04 19:47] ddrummond created |
weight_volume_relationships [2012/05/23 14:42] (current) 128.192.48.37 |
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| ====== Weight - Volume Relationships ====== | ====== Weight - Volume Relationships ====== | ||
| + | ====(1) Volume/Weight Relationship for Loblolly Sawlogs==== | ||
| + | ^Log Scaling Diam. Inches ^Weight/MBF International 1/4" Rule | | ||
| + | |6 |13,040 | | ||
| + | |7 |12,220 | | ||
| + | |8 |11,470 | | ||
| + | |9 |10,760 | | ||
| + | |10 |10,320 | | ||
| + | |11 |10,110 | | ||
| + | |12 |9,880 | | ||
| + | |13 |9,540 | | ||
| + | |14 |8,910 | | ||
| + | |15 |9,930 | | ||
| + | |16 |9,240 | | ||
| + | |||
| + | (Average pine = 12,666 lbs/MBF) | ||
| + | (Koppers, Inc.) | ||
| + | |||
| + | (2) | ||
| + | Cubic foot volume of cordwood (D = average diameter) | ||
| + | Solid volume of rough wood in Cu. Ft. = 4(D-6) | ||
| + | Stacked volume of rough wood in Cords = 4(D-6)/100 | ||
| + | Pulpwood stumpage value per tree = (4(D-6)/100) * price/cord | ||
| + | Number of Trees/Standard Cord = 90/4(D-6) | ||
| + | | ||
| + | ====Weight-Cord-Cubic Foot Relationships==== | ||
| + | |||
| + | Pine weight - volume conversion factors vary with species, age of stand, and distance from the coast. | ||
| + | Thus local conversion factors should be developed for each procurement area. Illustrative of the | ||
| + | variations existing are the average estimated weights per 128-cubic foot cord for the major pine type | ||
| + | groups: | ||
| + | |||
| + | ^Type ^Green weight per cord Lbs. | | ||
| + | |Loblolly Shortleaf: |::: | | ||
| + | |Texas to W. Louisiana |4700 | | ||
| + | |Central Louisiana through the Southeast |5200 | | ||
| + | |Longleaf-slash |5550 | | ||
| + | |||
| + | A cord of pulpwood from the Midsouth contains more wood now than it did 15 years ago. | ||
| + | |||
| + | ===Volume of wood per cord of pulpwood in the Midsouth=== | ||
| + | ^Region ^Year ^All Species ^Pine ^Hardwood | | ||
| + | ^Cubic feet per standard cord ^^^^| | ||
| + | |Midsouth |1950 |-- |75 |78 | | ||
| + | |Midsouth(1) |1965 |81 |81 |80 | | ||
| + | |East Gulf |1964 |80 |80 |79 | | ||
| + | |West Gulf |1965 |82 |82 |81 | | ||
| + | |||
| + | <sup>1</sup> East and West Gulf factors are combined in proportion to annual pulpwood production. | ||
| + | |||
| + | In a pile of wood made up of perfectly smooth cylinders of identical diameter, the solid-wood content | ||
| + | would be the same regardless of whether the diameter was large or small. But if diameters vary, the | ||
| + | solid-wood content increases, because small sticks fill up some of the space between large ones. On | ||
| + | the other hand, anything that causes deviation from the cylindrical (crook or roughness, for example) | ||
| + | will lessen the solid wood content. | ||
| + | |||
| + | When average diameter of bolts in creases, both these causes of variation operate to raise the | ||
| + | solid-wood content. This is because the range in diameters in a pile usually becomes greater as | ||
| + | average diameter of bolts in the pile increases, and also because large bolts tend to be less | ||
| + | crooked and rough than small ones. | ||
weight_volume_relationships.1333568872.txt.gz · Last modified: 2012/04/04 19:47 by ddrummond
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