Seismic codes (like ASCE 7 or Eurocode 8) calculate the base shear based on the total "Seismic Weight" (
. Double-check that your Mass Source definition reflects your local code. etabs mass summary by story
When you open the table, you will see several key headings. Understanding these is vital for an accurate peer review or design check: The specific level of the building. Seismic codes (like ASCE 7 or Eurocode 8)
If a story shows a mass significantly higher or lower than expected, it’s a red flag. Common culprits include: Understanding these is vital for an accurate peer
The geometric coordinates where the story mass is concentrated.
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.
In ETABS, the is one of the most critical outputs for structural engineers. It provides a concise breakdown of how weight is distributed across the height of a building—a factor that directly dictates seismic forces and dynamic behavior.