Create Grading Criteria in Civil 3D 2021

In this exercise, you will create a grading criteria set for a ditch grading, then create three criteria in the set.

Each grading criteria provides a standard formula for creating a graded slope. Individual criteria values can be locked so that they cannot be changed for individual gradings.

This exercise continues from Reviewing Grading Settings.

Create a criteria set

Note:
This exercise uses Grading-1.dwg with the modifications you made in the previous exercise.

1. In Toolspace, on the Settings tab, expand the Grading collection.
2. Expand the Grading Criteria Sets collection.
   The Grading Criteria Sets collection displays the existing grading sets for the drawing. You will create a new grading criteria set then create two new criteria within the new set.
3. Right-click Grading Criteria Sets. Click New.
4. In the Grading Criteria Set Properties dialog box, enter Ditch Criteria Set in the Name field, and optionally enter a description.
5. Click OK.
   The new criteria set is displayed in the Grading Criteria Sets collection.

Create a grading criteria

1. Right-click Ditch Criteria Set. Click New.
2. In the Grading Criteria dialog box, click the Information tab.
3. In the Name field, enter Distance @ -6%.
   This criteria creates a grade to a distance of 10 feet at -6% grade.
4. Click the Criteria tab and specify the following parameters:
   • Target: Distance
   • Distance: 10.000’
   • Projection: Slope
   • Format: Grade
   • Grade: -6.000%
5. For the Grade parameter, click to change it to . When you lock a grade value in a grading criteria, you are not prompted to specify its value each time you use the criteria.
6. Click OK.

Create a second grading criteria

1. Create a second criteria by repeating the previous procedure. However, use the name Surface @ 4-1 Slope and set the following values for the criteria:
   • Target: Surface
   • Projection: Cut/Fill Slope
   • Search Order: Cut First
2. Set the following values for both the Cut Slope Projection and Fill Slope Projection property groups:
   • Format: Slope
   • Slope: 4:1
     This criteria creates a grade to an existing surface at a 4-to-1 slope.
3. Click OK to close the Grading Criteria dialog box.

Create a third grading criteria

1. Create a third criteria by repeating the previous procedure. However, use the name Relative Elevation @ 3-1 Slope and set the following values for the criteria:
   • Target: Relative Elevation
   • Relative Elevation: -3.0’
   • Projection: Slope
   • Format: Slope
   • Slope: 3:1
     This criteria creates a grade to a relative elevation of –3 feet at a 3-to-1 slope.

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