Using Composite Beam Design Extension, you can quickly design and check the behavior of composite beams. You can also design an entire composite floor system on a floor-by-floor basis within a Robot model.

This application lets you select from two methods of calculating internal forces: Internal Engine and Robot Structural Analysis (for advanced users).

All design is based on ANSI/AISC 360-10.

This application works for composite steel beam design, but you can also use it for non-composite design.

The basic functionalities include the interactive and automatic design of composite beams.

Full bidirectional integration with the Robot model is achieved using this application.

Note: Composite Beam Design Extension 2026 will work only with Robot Structural Analysis 2026.

To install the application:

From the website, download zip file and unpack to a selected folder.

Run included executable file.

After the installation is complete, you may need to restart the Autodesk product to activate the add-in.

To uninstall the application:

1. Exit the Autodesk product if you are currently running it.
2. Uninstall it from Control Panel\Programs\Programs and Features (Windows 10/11), just as you would uninstall any other application from your system.

Limitations:

• The Internal Engine method does not support cantilevers and multi-span beams.
• Deck orientation is consistent with the x-x axis of the local coordinate system of the slab. 
• In a Robot model, we recommend using orthotropic slabs composed of trapezoidal steel plates.