To Remove a Mullion Definition From a Curtain Wall Unit Style

Use this procedure to remove a mullion definition from the Mullions definitions list. You cannot remove a mullion definition if it is assigned to a mullion. In addition, you cannot remove the default mullion definition, but you can modify it as needed.

1. Click Manage tab Style & Display panel Style Manager .
2. Expand Architectural Objects, and expand Curtain Wall Unit Styles.
3. Select a curtain wall unit style.
4. Click the Design Rules tab.
5. In the left pane, select Mullions under Element Definitions.
6. Select the unneeded mullion definition from the list.
7. Click the Remove Mullion icon to remove the mullion definition.
8. Click OK.