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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
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Title: Chapter 3:Sorting red maple logs for structural quality

Source: Undervalued hardwoods for engineering materials and components. Madison, WI : Forest Products Society ; Marquette, MI : Northern Initiative, [c2005]: pages 21-29.

Author(s)Wang, Xiping

Publication Year: 2005  View PDF »

Category: Book Chapter

Abstract: Nondestructive evaluation (NDE) of wood materials has a long history of application in the wood products industry. Visual grading of lumber is perhaps one of the earliest NDE forms. Visual assessment of a piece of lumber requires the grader to estimate a strength ratio on the basis of observed external defects (USDA 1999). The ratio is used to estimate the strength of lumber relative to a similar piece without defects. The estimation is based on standard lumber grading rules; however, it is entirely subjective and governed by the judgment of the grader. Furthermore, the value assigned to clear lumber of comparable size is only an estimated minimum based on tests of small, clear specimens (Bodig and Jayne 1982).

Keywords: Stress waves, red maple, grading, nondestructive testing, lumber, elasticity, modulus of elasticity, logs, wood quality

File size: 275 kb(s)

Date posted: 12/18/2008

This publication is also viewable on Treesearch:  view
RITS Product ID: 28584
Current FPL Scientist associated with this product
Wang, Xiping
Research Forest Products Technologist

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