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Re: Request for feedback

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Charlie,

Here is a list of items I would like AISC to include:

1.  Moment connections in the column week direction.  Currently only strong
axis connections are pre-qualified.

2.  Bracing connection guidelines for fixed end bracing especially for
SCBFs.  AISC seismic provisions say that fixed end bracing "have been shown
to dissipate more energy than those that are pin connected....",  however
all the recommendations such as the 2t yield line are for pinned
connections.

3.  Clarification of seismic requirements for non-building structures in
high seismic zones with R valves less than 3.  That is, when using R values
less than 3 to what degree do the"irregular structure" and omega provisions
apply.  This may be more a UBC issue than AISC.

4.  Clarification and commentary examples for "The maximum force, indicated
by analysis, that can be transferred to the brace by the system".  There
are several ways to qualify for this which have been discussed on this list
which should be included in the commentary.

5.  More liberal use of Ordinary Moments Frames for building and
non-building structures two stories and less.

6.  Exception of the Class A faying surface for newly galvanized steel in
bolted connections.

Thomas Hunt, S.E.
Duke/Fluor Daniel





                    "Carter,
                    Charlie"             To:     "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
                    <carter@aisc.o       cc:
                    rg>                  Subject:     Request for feedback

                    02/16/02 10:54
                    AM
                    Please respond
                    to seaint






We are in the process of developing the AISC Seismic Design Manual to cover
moment-frame systems, braced-frame systems and other aspects of
high-seismic
steel building design. It will be based upon the AISC Seismic Provisions
and
incorporate the results of the FEMA 35x series documents.

As currently conceived, it will be a companion to AISC Manual of Steel
Construction with information on:

   Dimensions and Properties (Seismic Restricted Shapes Only)
   Normal Ductility Systems
      Ordinary Concentrically Braced Frames
      Ordinary Moment Frames
      Drag Strut and Chord Design)
   High Ductility Systems
      Special Moment Frames
      Intermediate Moment Frames
      Special Concentrically Braced Frames
      Eccentrically Braced Frames
   Other Seismic Systems
      Special Truss Moment Frames
      Buckling Restrained Braced Frames
      Steel Plate Shearwalls

I would appreciate any constructive suggestions you would like to make
regarding content, design aids, tables, and other information you would
like
to see included in this Manual. You can reply to this list if you wish or
to
me pivately at carter(--nospam--at)aisc.org.

Thank you in advance for any help you are able to provide.

Charlie

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