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Adjustment Factor in NDS Appendix N (resistance factor)

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See NDS Commentary sections C2.3.5, C2.3.6, and C2.3.7 for background on the LRFD Adjustment factors. These adjustments are based on ASTM D5457. Here's a link to the NDS Commentary:

John "Buddy" Showalter, P.E.
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AF&PA/American Wood Council
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The American Wood Council (AWC) is the wood products division of the American Forest & Paper Association (AF&PA). AWC develops internationally recognized standards for wood design and construction. Its efforts with building codes and standards, engineering and research, and technology transfer ensure proper application for engineered and traditional wood products.

The guidance provided herein is not a formal interpretation of any AF&PA standard.  Interpretations of AF&PA standards are only available through a formal process outlined in AF&PA's standards development procedures.


I took SEAOC's recommendation to prepare wood design in LRFD. It maybe the way to do wood design eventually like or not.So I got to the NDS Table N1 on page 170 for KsubF to covert ASD values to LRFD.Why are the Ф (resistance factor) in the devision part of the adjustment?For connections the multiplier is already 2.16. If a resistancefactor 1/0.65 (connections) is also applied, it will become 2.16/0.65= 3.32.What is going on? ThanksSzuchuan