Etabs Mass Summary By Story Better Exclusive Now

Check if superimposed dead loads (SIDL) are applied correctly.

Confirm the inclusion of the appropriate percentage of live loads.

The Center of Mass coordinates; compare these to the Center of Rigidity. How to Improve Your Mass Source Setup etabs mass summary by story better

Architects often provide cladding as a line load. Ensure these are applied to the perimeter beams and that the mass source is set to include "Specified Load Patterns."

💡 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. Check if superimposed dead loads (SIDL) are applied

For better results, your "Mass Source" definition should follow these industry standards:

ETABS automatically lumps mass at the story levels. If you have significant mass between floors, consider adding dummy levels or intermediate joints. Troubleshooting Common Discrepancies How to Improve Your Mass Source Setup Architects

Mass moments of inertia; critical for capturing torsional effects.

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