Define the support conditions of a structural element. 
  
-  Identify the structural objects to which you want to add boundary conditions. 
		  
- Open a 3D view to see the analytical model. 
		  
- Click Analyze tab Analytical Model panel Analytical Model panel  (Boundary Conditions). (Boundary Conditions).Note: Verify that the boundary condition family types are assigned in the Structural Settings menu (for more information, see 
				 Boundary Conditions Settings). 
			  
 
- Click one of the following from the Place Boundary Conditions tab Boundary Conditions panel: Boundary Conditions panel:
- On the Options bar, select either Fixed, Pinned, Roller, or User from the State drop-down 
		  
- In the drawing area, click one or more structural elements to which you want to add the boundary condition. 
		    
			 Note: The end of the analytical line will highlight when you have correctly placed your cursor over it.