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RE: Allowable Stress

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I had heard a rumor recently that there might be another edition of the ASD
produced.  Up until then all I had heard was that ASD 9th edition was the
last.  So, I am assuming the rumor that I heard was false and the potential
existance of a 10th edition of ASD in nothing but an urban legend, eh?



At 01:20 PM 11/19/99 -0600, you wrote:
>     >""  All new AISC work (Specifications, Manuals, Design Guides and
>other technical products) is based in LRFD as it has been for some time
>now. Availability of the 9th Edition ASD Manual, however, is maintained
>with safety-related changes only for those who choose not to switch.  As
>Michael Valley pointed out, the subject question about strong-axis plate
>bending is treated in LRFD, but not explicitly in ASD. In part, this is so
>because plates in strong-axis bending are generally controlled by the
>lateral-torsional buckling (LTB) limit state. LTB is difficult to address
>in ASD because it does not lend itself to a working-stress-based elastic
>(or psuedo-elastic) solution that is generally taken for the stress at a
>single point in the member. There are provisions in ASD for LTB that cover
>the common cases, but they have been shoe-horned in from a model that is
>based upon the realistic behavior of the whole member (not just the
>supposed point of maximum stress).  Believe it or not, it can be harder to
>do things in ASD. I believe this is one such case.   Charlie