Twin-Bend Breeches, Round to Rectangle
A round trunk dividing into two segmented bends that turn opposite ways and change to rectangular duct as they turn: a bullhead at 90°, or any angle you give. A round trunk dividing into two segmented bends that turn opposite ways and change from round to rectangular as they turn; with both at 90 degrees, a bullhead. One plate per piece.
How the twin-bend breeches, round to rectangle is developed, with a worked example · Branches