@WalterDasTrevas: Thanks for the video However, I'm still not sure what you mean exactly Currently construction elements have a "bounding check", so if they intersect with a wall (while placing), the construction element will be pushed away from the wall (only the preview of course). Do you mean that?
0:19 and 0:34 - Those movements were automatic, I did not spin the beam to the right, but I had to correct rotating to the left.
The movement was soft, did not change much the position of the beam, but I believe that when the rotate velocity is bigger, the involuntary movement becomes larger, and the player needs to rotate to the left to correct.
But it's only happening in legacy mode. As I moved to the "local rotation", I'm no longer having a problem.