1. Draw the geometry of a circular ramp in space.
2. Access the Draw > Modeling > Meshes > Ruled Mesh command from the menu and create an AutoCAD polygon mesh surface.
3. Use the "Create a roof" command on the Advance Model toolbar. Select the AutoCAD surface on the command line.
4. Create a slab and select the "Bind elements to the roof or to the ramp" command on the Advance Model toolbar.
Note: On the Advance Tools toolbar, use the "Display the type elements by type" command to turn off the display of the control surface.