Sawmill Short Course Log Inputs – Measurement & Conversion ...

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Example: Weight Scaling Factor Ponderosa pine: Assume: Specific gravity = 0.38 Moisture content = 80% 1 cunit = Approximately 1.117 cords 1 MBF (log scale) = Approximately 2 cords 4268 pounds or 2.13 tons per cunit of solid wood 3821 pounds or 1.91 tons per cord wood 7642 pounds or 3.82 tons per MBF
Estimating the Number of Sample Truckloads Needed to Achieve a Specified Precision of Sale-wide Sale wide Estimates n = 1 (PE/CV) 2 (1/t 2 )+1/N Where: n = Number of truckloads in sample N = Estimated truckloads in sale PE = (E/x) x 100% CV = (S/x) x = Mean of ratio in cubic feet of wood per pound of wood and bark bark t = Student’s t ratio, for n larger than 25, t is approximately equal to 2 E = One-half One half the width of the desired confidence interval (The precision of the sample estimate of the mean of ratio ratio in cubic feet of wood per pound of wood and bark) From USFS Research Paper RM 311 by Markstrom & King
Page 1 and 2: Sawmill Short Course Log Inputs - M
Page 3 and 4: Common Log Measurements Board Foot
Page 5 and 6: Cubic Foot of Wood Defined as a so
Page 7 and 8: Linear Foot of Wood A wood member
Page 9 and 10: Board foot log rules Cubic foot sc
Page 11 and 12: Log Scaling Assumptions The log is
Page 13 and 14: Merchantability Guidelines Guidelin
Page 15 and 16: Defect Classifications (Region 2) 1
Page 17 and 18: Squared Defect Method Defective ar
Page 19 and 20: Length Deduction Method Used when
Page 21 and 22: Bucking Logs for Scale (Value) Buck
Page 23 and 24: Cubic Foot Measure Cubic foot rule
Page 25 and 26: Two-end Two end Conic Rule The log
Page 27 and 28: Is there a best system? - The case
Page 29 and 30: Benefits of Weight Scaling Reduced
Page 31: Weight Scale Factors Can use stand
Page 35 and 36: Conversion Factors for Log/Lumber M
Page 37 and 38: Conversion Factors for Log/Lumber M
Page 39 and 40: Log Grading Definition: Classifying
Page 41 and 42: Log Grades (Example)
Page 43 and 44: Grading strategies for small mills

Sawmill Short Course Log Inputs – Measurement & Conversion ...

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