Straighten Previous Ducts

The Straighten Previous Ducts command is used to make duct centerlines straight relative to the other centerlines to which they are connected. The first centerline you select will be treated as straight by the command. All of the centerlines that point to the selected centerline will be moved so that they are either parallel or perpendicular to the selected centerline.

Any centerlines connected to the centerlines that are moved will have their ending points moved to stay connected. Their starting points will not be moved, which can result in centerlines that are no longer straight. Continue using the Straighten Previous Ducts command until all of the centerlines are straight.

To straighten ducts, go to
Ribbon: DM HVAC→Ducts→  Straighten Previous Ducts
Pulldown Menu: DM HVAC→Duct Centerlines→Straighten Previous Ducts

You will be prompted to select the duct centerline that is straight.

Select the duct or label that is currently straight:

The previous centerlines of the selected duct will be made straight.

See the Previous and Next Ducts section for more information