Apply the Constraints

1. In the tree view, right-click on Constraints and choose New.
2. Rename the constraint to Fixed Beams.
3. Select the lines to fix, as shown in the figure below.

   

4. Be sure that Subcase 1 is selected in the Subcases list.
5. Leave all the defaults in the Constraint dialog.

   

6. Click OK to create the fixed constraint.