By Story |verified|: Etabs Mass Summary

. Double-check that your Mass Source definition reflects your local code.

Whether you are checking for modeling errors or prepping data for base shear calculations, here is everything you need to know about the Mass Summary by Story table. 1. How to Access the Mass Summary Table

Analysis Results > Structure Results > Mass Summary > Mass Summary by Story 2. Understanding the Columns etabs mass summary by story

If your "Mass Source" (Define > Mass Source) is set to include "Element Self Mass" AND "Loads," but you’ve also manually assigned mass, you might be double-counting.

By comparing the from this table to the Center of Rigidity (CR) (found in a separate table), you can determine the structural eccentricity. High eccentricity leads to significant torsional (twisting) effects during an earthquake. 4. Tips for Accurate Mass Results By comparing the from this table to the

Once you have run your analysis, follow this path to find the data: Display > Show Tables

For professional design reports, you can right-click the table and select . This allows you to create charts showing the mass distribution over the building height, which is a great visual aid for client presentations or calculation packages. 5. Exporting for Documentation

Ensure your Dead Load pattern has a self-weight multiplier of 1, so the program automatically includes the weight of beams, columns, and slabs. 5. Exporting for Documentation