Grade panel - TNC3

13.4 Grade Panel

Below the CAD viewer a panel is displayed with the node data of the grade:

Insert: Displays the Edit Grade Node dialog to insert a new node at the end of the grade.

Node list:

For each node the following information is shown in the list, from left to right:

Station: The station of the node.

Height: The height of the node.

Kv: The vertical curve radius at the node. If zero, the node is a simple break point with no vertical curve.

Tangent: The tangent length of the vertical curve at the node. Calculated automatically from the Kv value and the adjacent slopes.

Arrow: The arrow (sag or crest) of the vertical curve at the node. Calculated automatically.

Slope: The slope of the grade segment starting at this node, expressed as a percentage.

Edit: Displays the Edit Grade Node dialog to modify the node.

Delete: Removes the node from the grade.

Whenever a node is deleted or modified, the grade will be recalculated.

Grade tools:

In the lower right of the panel there are some tools for performing specific operations on the grade:

Shift Stations: Allows one to apply an offset to all node stations, shifting the entire grade along the station axis.

Shift Heights: Allows one to apply a vertical offset to all node heights, shifting the entire grade vertically.

Invert: Inverts the direction of the grade, so that the first node becomes the last.

If the active grade has been modified, when attempting to load a different grade or closing the application, a dialog will appear allowing one to save the changes to the original file or a new file, discard the changes, or cancel the close/file change.