Etabs Mass Summary By Story Better ((top)) Page

. When viewed floor-by-floor, this allows the engineer to track the alignment of the building’s inertial center. If the COM shifts drastically from one floor to the next, it indicates a potential for high eccentricity and torsional shear, prompting a redesign of the lateral force-resisting system before the project advances too far. 4. Efficiency in Base Shear Calibration

💡 Always compare the Total Mass in the summary table to the Base Reaction for a dead load case. They should be identical. If they aren't, your mass source is likely missing a specific load pattern. etabs mass summary by story better