Takeoffs enable you to position a fitting at any location on a duct segment. You attach the takeoff to the center line or curve of the segment, and then rotate the takeoff to a specified angle around the segment.
You can also position the takeoff off center from the center line or curve of the segment, referred to as an off-center takeoff. For example, you can attach the takeoff to the side of a duct segment above the center line. The offset distance is defined as the distance from the center line of the duct segment to the center line of the takeoff fitting.