The physical weight of structural elements and permanent finishes. Live Load Reduction:
To get a clear picture of how your building’s weight is distributed, follow these steps in ETABS. This summary is essential for verifying your seismic mass and ensuring your model’s gravity loads make sense. How to Find the Mass Summary
Once you have the summary, perform these three critical checks: etabs mass summary by story
A quick glance at the cumulative mass helps verify if you are working in kips, tons, or kilograms. C. Calculating Eccentricity
: Confirm that the mass decreases or changes logically from the roof down to the base. The physical weight of structural elements and permanent
You can access this summary in three ways:
Next she compared imposed loads used to compute masses. The mass summary reminded her of the live load reduction she’d applied per code: residential floors used a reduced live load factor, but the rooftop mechanical area still used full live load. That explained a spike at Story 11 where the plant room sat. She adjusted the live load assignment—moving some equipment to a lower floor—and watched the mass numbers settle into a more uniform gradient. How to Find the Mass Summary Once you
Lateral mass lumped at story levels for accurate seismic response. 3. Mass Summary Table