Using revit 2014. Although the duct is higher than the walls, the walls are overriding the duct. I want the duct to override the walls. Cant seem to make this work and dont understand why. Any suggestions would be greatky appreciated. Please see attachement to understnad what I am looking at. Many thanks.
My guess is your view cut plane is set below your duct height. In order for the duct to override the wall you need to place a plan region over that portion of the wall and set the height of your plan region to the height of the duct.