With this option, the required direction (e.g. the local y’ axis of a beam/column profile) will be perpendicular to a defined plane/line. The plane can be given with three points and the line with two points (start and end points). In case of the perpendicular plane, the third point defines the final orthogonal direction, which the new direction will be parallel with. The new direction is set for all objects till   stops the repetition of object insertion and restarts with another direction definition.

Figure: The local y’ axis of beam profiles is perpendicular to the defined plane

Figure: The local y’ axis of column profiles is perpendicular to the defined line