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

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Board Foot Log Rules The three most commonly used board foot log rules are: 1. Scribner Decimal C 2. International (saw kerf ¼ inch) Doyle 3. Doyle • The International Rule is most precise, but the Scribner Decimal C is more commonly used • In the Rocky Mountain Region, Doyle’s log rule is only used in eastern Kansas and Nebraska
Log Scaling Assumptions The log is a cylinder • Cylinder diameter equals inside bark diameter at the small end of log • Cylinder length equals log length Logs are cut into boards one inch thick Saw blade thickness (kerf ( kerf) ) varies from 1/8 to 3/8 inches Boards are utilized to the specified minimum width The minimum board length equals log length The log if free of defects
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: Board foot log rules Cubic foot sc
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 and 32: Weight Scale Factors Can use stand
Page 33 and 34: Estimating the Number of Sample Tru
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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