Changing the justification of ducts in Revit

Step-by-step guide

When using Autodesk Revit for ductwork, it may need to be justified (aligned) along the tops, bottoms, or sides of the ductwork in a section of the system. For example, if a building design calls for more space in certain areas, realigning ducts can make room for other conduits or improve floor plan efficiency.

Note: Specify Wireframe for Visual Style before using the Justification Editor.

1. Open a model that contains a duct system.
2. Isolate the area of the duct system to be justified.
3. In the drawing area, activate the 3D view.

4. Select all the ducts you want to justify. (You do NOT need to include the duct reducers as part of your selection.)

In this example, the ducts are currently justified to the center of the smaller duct at the end of this run. The two ducts in this run are highlighted in blue to indicate that they are selected.

5. From the ribbon, Modify | Ducts tab, Edit panel, click Justify.

The Justification Editor contextual ribbon opens.

In the model, note the position of the control point (represented by an arrow) in the center of the smaller duct.

To change the location of the control point:

6. In the Justify panel, click Control Point. This moves the control point to the other end of the run of selected ducts.

7. In the Justify panel, click the top-center square containing the smaller blue square justified to the top and center. Note the control point changes its position to the top and center of the large main duct.

8. In the Justify Editor panel, click Finish.

The smaller ducts are now justified to the top of the larger duct and centered along the direction of the control point:

9. Orbit the 3D view to see how the ducts and reducers have been rearranged.

To justify ducts using the Alignment Line justification tool:

10. Select another run of ducts.
11. From the Justification Editor contextual ribbon, click Alignment Line.

In this example, the duct containing the control point highlights with dashed reference lines along the center of each of its faces and along its corners:

12. Click one of the lines, and the position of the control point changes.

13. Click Finish to justify all selected ducts to the chosen alignment line.
14. Click Cancel to dismiss the Justification Editor without applying any changes.