The Mass Summary by Story table in ETABS is often considered "better" or more reliable than other mass tables because it provides a comprehensive accounting of all structural mass assigned to a level, regardless of whether a diaphragm is present. Why "Mass Summary by Story" is Often Preferred
: When defining the Mass Source from "Specified Load Patterns," ensure "Element Self Mass" etabs mass summary by story better
Detect "ghost mass" from accidental double-counting or modeling errors. Accessing the Data To find this specific table after running an analysis: Navigate to the Model Explorer. Expand Tables > Analysis Results > Structure Results. Right-click Mass Summary by Story and select Show Table. Key Columns to Analyze Significance UX / UY The total translational mass in the X and Y directions. Sum UX / Sum UY The Mass Summary by Story table in ETABS
2. The "Ghost" Check (Zero Values)