To obtain a Mass Summary by Story in ETABS, you must first define your mass source and then run the analysis to view the generated tables. This summary is essential for verifying the seismic weight and ensuring the structure's center of mass is correctly captured for lateral analysis. 1. Define the Mass Source
The mass used for dynamic analysis was derived from the following criteria: Element Self Mass: Additional Mass: [e.g., Cladding or Floor Finishes] Lumped Mass: etabs mass summary by story
: Vertical mass (included if "Include Vertical Mass" was selected in the Mass Source). Sum UX / Sum UY : Cumulative mass from the top down to that specific story. : The equivalent weight of the story mass (Mass × Computers and Structures, Inc. 4. Verification Tips Manual Check To obtain a Mass Summary by Story in
The Mass Summary by Story report in ETABS summarizes the mass properties of a building model, including: Define the Mass Source The mass used for
If you'd like to dive deeper into your specific project, tell me: building code you are following (e.g., ASCE 7-22, Eurocode 8). If you need help resolving irregularities (like torsional imbalance). How to export this data for manual base shear calculations.