Add Flat Switchback

On the Mining | Pit Design tab, in the Ramp group: Click Add Flat Switchback to automatically switch the direction of the current road  from clockwise to anti-clockwise (or vice versa).

If not already selected, you will be prompted to select a TOE, PSEUDO TOE or CREST line on which a road has been created:

If not already selected, you will be prompted to select the red road point on which to build the switchback:

The following properties are displayed in the Flat Switchback Properties form:

Curve Radius

Specify a radius value that will be used to determine the extent and tightness of the curve of the turning area.

Road Switchback Angle

By default the switchback angle is 180°. To turn the road by a different amount, enter an angle value.

Radius Specified By

The radius is measured from a specified (Inner , Centre, Outer, or Custom ) point on the road, taking into account the road width (which is already defined as part of the properties of the road).

  • Inner curve radius must be greater than 0

  • Outer curve radius must be greater than the road width

  • Centre curve radius must be greater than half of the road width

  • To measure the radius from a specific point on the road, select the Custom option and specify a value which is a factor of the road width.

Inset Radius

If the Inset Radius check box is selected, specify a secondary Curve radius value that will be used with the primary curve radius to determine the tightness of the curve of the turning area.