In the Grids task, create grids as needed for drawing the trench path.
In the Civil task, click Place Trench .
Click Path , and define the path of the bottom of the trench.
Select a cardinal point at the bottom of the trench: Bottom Left , Bottom Center , or Bottom Right .
Select Define start depth and top slope as the placement method.
Select the parent system of the trench run.
Select a trench Type and its respective cross-section.
The start depth is defined by the Catalog during placement. You can modify this after placement.
Type a value for Top Slope.
The trench is created, as shown in the following example trench elevation:
1 - Drawn trench path with varying global Z-coordinates along the path
2 - Defined bottom cardinal point for cross-section
3 - Defined start depth from trench cross-section
4 - Defined top slope
5 - Defined footing thickness from trench cross-section
6, 7, 8 - Trench depths computed by (rim elevation from top slope) - (invert elevation from global Z-coordinate of drawn path)
For more information, see Modify a trench feature.