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On Nov 14, 2008, at 11:40 AM, Bill Allen wrote:
Why are you being such a trouble maker? You must be bored.
Careful, there. I've kept all my old whiny e-mails on LRFD vs. ASD and I'm not afraid to use them. ;->

The reason that stress trumps load is that yield stress is required to determine the load where plastification begins (in ductile materials anyway). If you don't know the load for the onset of plasticity you can't make use of the plastic reserve to determine the limit load. You also won't know much about suitability for service in situations where the structure remains elastic.

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 1864)

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