By Story | Etabs Mass Summary

The mass summary by story is a vital tool for structural engineers, as it helps them understand the distribution of mass within the building. This information is essential for several reasons:

Ensure your Mass Source includes 100% of the Dead Load and the code-specified percentage of the Live Load (usually 25% for storage or per local IBC/ASCE codes).

Finally, the summation at the base of the table acts as the ground truth for the . The total building mass reported in the summary must match the "Total Weight" used in the calculation of the base shear ($V$). etabs mass summary by story

The specific level (e.g., "Story1," "Roof," "Terrace").

The ETABS Mass Summary by Story is not merely an output table—it is a diagnostic tool. Before interpreting any period, mode shape, or base shear, engineers must: The mass summary by story is a vital

If you are meshing walls extensively between stories without using the correct point labels or story-level constraints, masses may not be lumped perfectly to the diaphragm level.

The mass moment of inertia about the global X, Y, and Z axes. The total building mass reported in the summary

Generating the mass summary by story in ETABS is a straightforward process:

Double-click to open the interactive data table.