Terms & Concepts for Forest Measurements III
What follows is a guide for
what you are responsible to know. Actual questions on quizzes & tests will
vary - additional terms and questions are possible (likely). Check back often for updates
(indicated in red font).
Scaling
Glossary
Cruising Glossary
Introduction to
Log Scaling
Terms
|
foot board measure (FBM), cunit,
dm3 |
|
piece scaling, weight scaling,
foreign material |
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butt swell, callipering, check,
shake, clear, collar, dryland sort, gross scale, merchantable lumber, peeler
block, "rads", accountant' rounding, slab |
Questions
|
Briefly compare Doyle, Scribner
and 'Decimal C' log rules |
|
Briefly compare log rules vs.
Lumber Cubic Scale vs. Firmwood Cubic Scale |
|
Provide an overview of weight
scaling |
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Briefly describe the layout (what
do the numbers mean) and use of the BC Metric Scale stick (determine gross
and net measures) |
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Provide an outline of log scaling
history in BC (i.e. provide significant dates and methods) |
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Determine the gross volume of a
log using Smalian's formula and the scale stick (or half-volume tables) |
|
Differentiate between common
species of logs found on a dryland sort on the coast of BC and provide the
accepted two-digit code |
Firmwood Calculations
Terms
|
net firmwood volume, decay
(incipient, intermediate, advanced), butt rot, heart rot, sap rot, conk
knot, ring rot, pocket rot, punky |
|
cat face, dead side, missing
wood, (sound wood) collar, end checking, fractures |
|
unit volume, average unit volume
(running volume, 1 metre volume), end deduction, length deduction |
Questions
|
Calculate net measures (end,
length and volumes) of logs with defect |
Log Grading
Terms
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trim allowance, bark seam,
fracture, clear, twist (spiral grain), ring count, displaced centre |
|
knots, knot indicators,
occasional larger knots (OLK), 'otherwise grade', pistol grip/ sweep, peeler
block, quality considerations, worm holes, toredos |
|
schedule of coast timber (log)
grades, shop grades, sorts, side |
Questions
|
Provide the schedule of log
grades in tabular form for common coastal tree species |
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Describe and be able to apply the
correct procedures for determining:
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twist |
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ring count |
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displaced centre |
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grade reduction - a.k.a.
apply trim allowance for various defects (i.e. volume not available for
lumber) |
|
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Using the "cheat sheet", apply
the correct procedures for determining log grades according to the schedule
of coast timber (log) grades |
Practical Sampling & Statistics
Terms
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standard deviation (SD),
coefficient of variation (CV), standard error (SE), sampling error (E),
confidence level, confidence interval |
|
accuracy, precision, bias, random
sampling, systematic sampling, stratification |
Questions
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For any given sample set,
determine E (% or units) at any confidence level |
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Stratify a sample set and
determine the combined E (% or units) at any confidence level |
Call Grade & Net Factor
Terms
Questions
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