This is an example of the graphic representation of a Duct with a parallel orientation in a drawing.
Each duct is labeled with the cross section size from the model.
Horizontal and vertical ducts with Parallel orientations (horizontal and vertical) are dimensioned to each other. The dimensions are placed in white space on each side of the drawing. Horizontal ducts are dimensioned vertically, and vertical ducts are dimensioned horizontally. When the drawing updates, the duct dimensions also dimension to nearby columns, because the columns are anchored.