friend of mine who is a grad student at a local University
that one of his professors has stated that "AISC is
to ASD and away from LRFD."
that he referred to the upcoming AISC Manual of Steel
>Construction which will,
reportedly, have ASD side-by-side with
much the same way that the AISI CFS manual does.
there something in the works that I don't know about?
ASD and LRFD have
been combined into a single approach that is truly the best of both. Cliff
Schwinger did an excellent job of explaining how it will work in the 2005 AISC
Specification. I'll just add that the breadth of coverage currently found in
LRFD will be extended to allow its use in ASD as well. And there is one set of
equations no matter which method you choose (which really just means which set
of ASCE 7 load combinations you choose). If you want more detailed information
about this, read here:
I'd also like to whet
your appetite for something we've been developing over the past few months as
the specification has begun to gel. With a series of arbitrary limitations and
simplifying assumptions, we have created two 5x8 cards that contain all design
equations needed to cover typical applications. One card has all typical
design equations needed for W-shapes, M, S and HSP shapes, and channels on one
side and HSS and steel pipe on the other. The second card has all typical
design equations for connections, including bolts, welds and connecting
elements, on one side and analysis requirements on the
There is not a single
equation on these cards that is longer than the front half of your thumb.
Additionally these cards will be equally useful to the engineer who thinks in
stress and the engineer who thinks in strength, regardless of whether you use
ASD or LRFD.
One final thought,
these cards will be made available for free download to AISC members through