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Re: strong axis bending of a bar

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>  I think this is an easy one but I haven't found it yet.  I have written 
>in my AISC 9th edition that the allowable bending stress of a plate bent 
>about its strong axis is Fb = 10,000/ (Ld/(t cubed)) <.66Fy.  Anybody know 
>where I got this?  Is it 
This is a stability criterion. I haven't found it in any of my books 
either, but the form is similar to relationships for compression due to 
bending. Except for the t^3 parameter. I think it's should be t^2. You 
can probably figure it out using the ASD commentary.

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