At C2, the caller generally restricts Offset FORMATION
calls to easy calls which are not shape-changers.
If the given call is a shape changer (that is, you are
unable to end on the same set of footprints because the original 2 x 4
has rotated by 90°), then retain the Shear Line and the Shift Direction.
See Appendix A
for a discussion on Shape-Changing. EN: 160