Review data on geometry, load cases and combinations, and static analysis results.
The extension reads geometry data, simple load cases, and results of static calculations from a Robot model. Before you start the design, review this data. If modifications are necessary, close the Composite Beam Design Extension dialog, and modify the data in Robot.
After you modify the model data, click Analysis 
Calculations to perform static calculations of the model. Next, start Composite Beam Design Extension.
Units
Units for design data are read from the Robot model. To access unit settings in Robot, click Tools Job Preferences Units and Formats.