Etabs Mass Summary By Story [better] Jun 2026

In ETABS, the is a critical report for verifying your seismic weight and ensuring your mass source is defined correctly. It provides a floor-by-floor breakdown of masses and their locations (centers of mass) used during analysis. 1. Verify Mass Source Settings

If you use Rigid Diaphragms, your Mass Summary will show a single point mass at the CM. This is fine for simple boxes. But if you have a podium slab or a building with a hole (an atrium), using a rigid diaphragm will overestimate torsion because mass is artificially concentrated.

ETABS offers three options:

Have you ever found a major mistake just by looking at the Mass Summary? Share your war story in the comments below!

Master these steps, and you will never fail a seismic peer review again. The is your first and best friend in dynamic analysis—treat it with respect, verify it relentlessly, and it will guide you to a safe, economical design. etabs mass summary by story

Self-weight assignment.

The table will break these down into columns such as: In ETABS, the is a critical report for

: It allows you to cross-check the "Mass Source" definition (Dead Load + partial Live Load) against manual calculations. Dynamic Analysis

The table typically includes the following columns for each story: Mass X & Mass Y Verify Mass Source Settings If you use Rigid