Select all of the edges of the solid beam.
Copy the edges to curves.
Delete the solid.
Go through the curves one by one, testing the start points and the end points, testing for non-zero x coordinate.
Delete any curves that have such a non-zero x coordinate in such points.
Join the remaining curves.
Rotate the profile, about the origin, 90 degrees in the top Frame.
Rotate the profile, about the origin, -90 degrees in the right Frame.
This places the "tips" of the beam profile in the +y direction.
Save file.
Process next file.
- Brian