Prefabricated elements - beams

Using the Autodesk AutoCAD Structural Detailing - Formwork Drawings module, you can define and modify prefabricated beams with a rectangular cross-section (tapered section):

You can also define positions of the cross-section at the beginning and end of a beam (how the cross-section defined at the beam beginning is positioned at the beam end):

Some characteristic positions of cross-sections at the beginning / end of a beam

An arbitrary position of the cross-section determined by specifying values for parameters A and B.