Etabs Mass Summary By Story Jun 2026

The in ETABS is a critical output table used to verify the mass distribution of a structural model, ensuring that seismic and dynamic analyses are based on accurate data. Overview of Mass Summary by Story

to each floor and check the "Calculate Diaphragm Center of Rigidity" option in the analysis settings. etabs mass summary by story

Navigate through: > Mass Data > Mass Summary by Story . Key Components of the Summary The in ETABS is a critical output table

. These represent the inertial mass in the two horizontal directions ( ) and vertical direction ( Often in tonft o n f Key Components of the Summary

to include dead loads and a portion of live loads (standard seismic practice often uses 1.0 for Dead/Super Dead and 0.25 for Live Load). Lump Lateral Mass at Story Levels

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.

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