Etabs Mass Summary By Story

Understanding Mass Summary by Story in ETABS In structural engineering, the Mass Summary by Story

Check the Mass Source: Ensure "Self-Weight" and "Specified Load Patterns" are correctly toggled. etabs mass summary by story

1. Sanity Check: Does the total weight make sense? (e.g., a 5-story office building typically weighs between 80–100 psf. If the total implies 300 psf, something is wrong).
2. Distribution: Does the mass decrease as you go up the building? (It usually should, as column and wall weights reduce with height).
3. Location: Is the Center of Mass roughly in the geometric center of the floor plate? If it is near the edge, verify your loading pattern or rigidity distribution.

Whether you are performing a seismic analysis (Response Spectrum or Time History) or simply checking vertical load distribution, understanding the Mass Summary is non-negotiable. This article breaks down what this summary tells you, where to find it, and how to use it to validate your model. Understanding Mass Summary by Story in ETABS In