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RE: braced frames

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snip< These restrictions were also in the 1994 UBC (Section 2211.7.3)
and are not new.  Yes, you are still effectively precluded from using large
sections in high seismic zones.>

Just to clarify, i checked '94.. 2211.7.3 applied to moment frame columns
only, and 2211.9.2.4 applied to special brace frame only. 

The 97 code sec. 2213.8.2.5 is indeed new and applies to all braced frames.
This will affect everyone of us that ever wants to do a braced frame again!
Large size tubes as braced frame elements were are fairly common i think,
but can't be anymore !!

matt jordan