Use Semi-Rigid diaphragms for irregular buildings. Then check the Mass Summary again—you’ll see mass distributed across nodes.
In ETABS, the Mass Summary by Story is a critical output used to verify the distribution of mass across different levels of a building for seismic analysis. This table summarizes the total mass at each story level, which the software uses to calculate inertial forces. E-Construct Design & Build Pvt LTD How to Access the Mass Summary To view this data in ETABS, follow these steps: Run the Analysis : Ensure your model has been successfully analyzed. Open Tables : Go to the Display menu and select Show Tables Navigate to Mass Results Structure Results Select Table : Check the box for Mass Summary by Story CSI Knowledge Base Key Components of the Table etabs mass summary by story
Before generating the report, ensure your mass is calculated based on the correct load patterns. : Go to Define > Mass Source . Typical Settings : Select Specified Load Patterns and add: Dead/Super Dead : Multiplier of 1.0 . Use Semi-Rigid diaphragms for irregular buildings
Ensure you have assigned a Mass Source (Define > Mass Source) and that you have checked the box "Include Lateral Mass." This table summarizes the total mass at each
Before you send that ETABS model to your senior engineer or client, open the Mass Summary by Story and verify: