Etabs Mass Summary By Story -

Base shear depends directly on the structure's total seismic weight (

I can provide tailored advice or troubleshooting steps based on your model's parameters. Share public link

Look at the bottom story (typically the base or ground floor) in the column. Multiply this final mass by gravity (

Note: To avoid doubling your dead load mass, do not check both "Element Self-Mass" and include the "Dead Load" pattern in the specified multipliers unless your dead load pattern explicitly excludes self-weight. How to Extract the Mass Summary by Story Table etabs mass summary by story

If your Mass Summary looks incorrect, check these common modeling errors:

Converts static loads into mass (e.g., of Dead Load +

: The translational mass in the X and Y directions (usually identical). Base shear depends directly on the structure's total

The table contains several columns that represent different directional forces and mass locations. Understanding these terms ensures correct interpretation of your model. : The specific floor level being reported.

Take five minutes to review this summary before every analysis. It will save you weeks of debugging hidden errors and ensure your building stands strong when the ground shakes.

Once you have successfully run your analysis in ETABS, follow these steps to view the data: Navigate to the on the left-hand side. Go to Tables > Analysis > Results > Structure Results . Double-click on Mass Summary by Story . How to Extract the Mass Summary by Story

| Pitfall | Consequence | Fix | | :--- | :--- | :--- | | | Ignored live load and SDL; unconservative base shear | Define custom mass source (Dead + SDL + % Live) | | Duplicated Mass | Artificially high seismic forces | Check for overlapping shells or duplicate area loads | | Zero Rotational Mass | No torsional periods; inaccurate mode shapes | Assign diaphragm constraints to all floors | | Mass at Pinned Base | Building wants to lift off during analysis | Release base restraints or ignore (static only) |

When you define a in ETABS (typically consisting of the self-weight of structural elements, superimposed dead loads, and a percentage of live loads), the software calculates the volume and material density of everything assigned to a specific story. It then converts this weight into mass ( ) and reports it at each story level. Key Components of the Table

The total mass assigned to that story acting in the global X and Y horizontal directions. In most standard buildings, UX and UY will be identical.

Navigate to the window on the left side of the screen. Expand the Tables tab. Expand Analysis Results в†’right arrow Structure Results .

What (e.g., ASCE 7-22, Eurocode 8, IS 1893) are you designing for?