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Another Timber Connection Questio

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The answer depends on which Hankinson equation you use from NDS(r)
Appendix J. If you choose J-2, which uses Fe in the Hankinson equation,
then you would apply the Cdelta adjustments after you calculate Ztheta
to come up with Z'theta.

If you choose equation J-3, which uses Zparl and Zperp in the Hankinson,
then you would apply the Cdelta adjustment before you calculate Ztheta.
In this case you would adjust Zparl to come up with Z'parl and you
adjust Zperp to come up with Z'perp before calculating Z'theta. 

If you look closely at the definitions in Appendix J, you will see that
Z'parl and Z'perp are defined as "adjusted lateral design values..."



John "Buddy" Showalter, P.E. 
Director, Technical Media 
AF&PA/American Wood Council 
1111 19th Street, NW, Suite 800 
Washington, DC 20036 
P: 202-463-2769 
F: 202-463-2791 

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.


From: "Joseph R. Grill" <jrgrill(--nospam--at)>
To: seaint(--nospam--at)
Subject: Another Timber Connection Question

If you have a bolted connection near the end of a timber member. There =
are bolts, loaded at an angle to the grain which are close enough to the
= end and close enough to the edge to require C delta reductions to both
= end distance and edge distance. Are those reductions applied to Z
parr. = and Z perp. before entering into the Hankinson Formula, or are
they both = applied to the value of Z theta after the Hankinson Formula?
I believe = before, but I can't find anything to substantiate this.
Joe Grill

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