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Weight in Etabs?

Weight in Etabs?

Weight in Etabs?

(OP)
Why the weight used in the seismic calculation of lateral loads differ from the weight calculated from the supports reactions if I am taking into account the same mass source? I have a difference from 2557.09 t to 2453.81 t.

RE: Weight in Etabs?

(OP)
I already found my answer, in the top level etabs divide the column weight by 2.  

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