You can use this as a template or a direct submission for a course or technical report.
Master the mass summary, and you master the seismic response of your structure in ETABS. etabs mass summary by story
Below is a drafted report structure for presenting this data. Structural Mass Summary Report 1. Project Overview ETABS 2026 Model Status: Analysis Completed Mass Source: Defined as [e.g., Self Mass + 25% Live Load] 2. Mass Source Definition You can use this as a template or
What does this tell you?
Once you have the summary, perform these three critical checks: Structural Mass Summary Report 1
Center of Mass (CM) and Center of Rigidity (CR): Documentation of these coordinates to demonstrate any inherent torsion or eccentricity in the building.
Warning: If you forget to define the mass source, ETABS uses the default (self-weight only). You will underestimate mass by 30–50%, leading to an unconservative design.