Etabs Mass Summary By Story Better May 2026

Ensure you haven't modeled a slab over a slab, which doubles the mass in that specific story.

If you'd like to dive deeper into the technical side, I can help you with: The for mass source. How to export this data to Excel for faster reporting.

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 . 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 etabs mass summary by story better

Seismic forces are calculated based on mass. If your story mass is off, your base shear and lateral forces will be incorrect. This table allows you to: Verify the self-weight of slabs, beams, and columns.

Understanding the mass distribution of a building is the foundation of accurate seismic analysis. In ETABS, the "Mass Summary by Story" table is your primary diagnostic tool for verifying that your mathematical model reflects physical reality. Ensure you haven't modeled a slab over a

Confirm the inclusion of the appropriate percentage of live loads.

Check if superimposed dead loads (SIDL) are applied correctly. Right-click Mass Summary by Story and select Show Table

Check if you applied property modifiers (like 0.0 weight) to certain elements.

Interpreting between the Center of Mass and Center of Rigidity.