In-forest assessment of veneer grade Douglas-fir logs based on acoustic measurement of wood stiffness

Acoustic technology has proven to be a well-established nondestructive technique for assessing potential product performance by identifying logs with high stiffness. In an ongoing endeavor to optimize merchandizing and enhance timber value recovery, 7 second growth Douglas-fir stands of similar age...

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Bibliographic Details
Published in:Forest products journal 2008-11, Vol.58 (11), p.42-47
Main Authors: Amishev, Dzhamal, Murphy, Glen E
Format: Article
Language:English
Subjects:
acoustic properties
Acoustics
Analysis
bark
bending strength
branches
density
Elasticity
Forest products
Forest products industry
Impact analysis
length
Lumber
Materials durability
Mechanical properties
modulus of elasticity
nondestructive methods
Nondestructive testing
Pseudotsuga menziesii
regression analysis
spatial distribution
statistical models
Studies
testing
Timber
Trees
Velocity
veneer logs
Wood products
wood quality
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Summary:Acoustic technology has proven to be a well-established nondestructive technique for assessing potential product performance by identifying logs with high stiffness. In an ongoing endeavor to optimize merchandizing and enhance timber value recovery, 7 second growth Douglas-fir stands of similar age class in western Oregon were sampled, totaling 1,400 trees and more than 3,000 logs. This research investigated the effects of spatial as well as internal and external log characteristics on Douglas-fir wood stiffness. Stand-level in-forest log acoustic measurements, as well as dynamic modulus of elasticity values correlated well with the actual G1/G2 veneer grade.
ISSN:0015-7473
2376-9637