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Structural lumber grading

Standard rules for grading of structural lumber are established by organizations that have been certified by:
A. NELMA
B. NSLB
C. WWPA
D. ALSC
E. WCLIB
Answer"D. American Lumber Standards Committee certifies the other agencies listed, administering the American Lumber Standard (ALS) system; more info at http://www.alsc.org/geninfo_summary_mod.htm

ARE 4.0 exam prep: SS

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