Incorrect mass source is a leading cause of erroneous dynamic results.
In ETABS, the is a critical output table used to verify the total weight and mass distribution of a building for seismic and dynamic analysis. How to Access the Mass Summary Table To view the story mass data after running your analysis: Navigate to the Display menu. Select Show Tables . etabs mass summary by story
) of a structure, which directly dictates the base shear calculation ( Incorrect mass source is a leading cause of
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. you likely forgot to include cladding