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70%-30% Bracing Load Distribution

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In AISC Seismic-02, 13.2c, up to 70% of the lateral seismic force could be resisted by tension braces.
Does this mean that if I have an X-Bracing I could assign one brace to resist 70% (tension) and the other brace to resist 30% (compression)? I will not get the 70-30 distribution by using Staad which will
have 50-50 distribution assuming the brace members are the same.
 
 
Rainier C. Catubig, S.E.
San Diego, California