Compare the total weight (multiply mass by ( g )) against your hand calculation. If the ETABS total is 5,000 kN but your Excel sheet says 7,500 kN, you likely forgot to include cladding, finishes, or the live load percentage in the Mass Source.
: The translational mass along the global X and Y axes. These values are used to calculate the inertial forces during seismic events. etabs mass summary by story
The values in the summary table are derived directly from the definition ( Define > Mass Source ). ETABS calculates mass based on three primary settings: Compare the total weight (multiply mass by (