Construct Parabolic Fillet

Used to construct a parabolic fillet (curve element) between two lines.

You can access this tool from the following:

Setting	Description
Distance	The distance between the points of tangency.
Type	Sets how the parabola is aligned: Horizontal — aligned with the horizontal view axis. Used in highway design to join intersecting grade lines. All IGDS parabolas are horizontal. Symmetric — aligned with the selected lines.
Truncate	Controls which line(s) are truncated. None — neither line is truncated. Both — both lines are truncated at their point of tangency with the fillet. If a fillet is constructed between two closed elements or an open and a closed element, the closed element(s) are not modified.

Note: In 3D, for two both elements to be filleted, they must be on the same plane.

To place a B-spline curve in the form of a parabola, use the Conic Curve tool.

Key-in: PLACE PARABOLA [ HORIZONTAL | MODIFY | NOMODIFY ] [ MODIFY | NOMODIFY ]