Frequent question: How do you grade a surface in Civil 3D?

How do you create a grading surface in Civil 3D?

To Create a Detached Surface From a Grading Group

  1. Click Home tab Create Ground Data panel Surfaces drop-down Create Surface From Grading Find.
  2. In the Select Grading Group dialog box, specify the site and the grading group.
  3. Click OK. The detached surface is created.

What is a grading surface in Civil 3D?

The objective in grading is to build a proposed surface using points, feature lines, polylines, and gradings. Then you may calculate volumes comparing it to the existing surface. … Complicated grading projects can cause slowness and possible crashing.

How do you calculate surface area in Civil 3D?


  1. Select the required surface.
  2. Select Surface Properties (from the ribbon, Prospector or right mouse button)
  3. Select the Statistics tab.
  4. Open the ‘Extended’ group.
  5. The 2D and 3D surface area are displayed as shown.

What is graded surface?

Graded surfaces can be created from an existing surface. Defining a graded area can be accomplished using a polyline as an entity. … Slope to surface needs an input entity (e.g. polyline, line, arc, circle), surface, and slope to grade the surface. Offset to slope needs an input entity, offset, and slope.

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What are feature lines in Civil 3D?

Feature lines are 3D objects which can be used as grading footprints, surface breaklines, and as corridor baselines. About the Feature Lines Collection (Prospector Tab) Use the Feature Lines collection in the Prospector tree to manage feature line styles and layers.

Where will be grading sites are applied in Civil 3D software?

The list of grading objects defined in the drawing appears in Toolspace, within the Sites collection on the Prospector tab. Grading styles and Grading Criteria Sets appear in Toolspace on the Settings tab.

How do you find the area of a sloped surface?

Multiply the hypotenuse by the length of the roof. The result is the surface area of the sloping roof. For example, if the sloping surface is 11.18 feet wide, and the roof is 30 feet long, the sloping area is 335.4 square feet — 11.18 x 30 = 335.4.

What is a 20% grade?

Slopes vs. gradients vs. % grades

Angle (degrees) Gradient Grade (%)
18 1 32.5
19 1 34.4
20 1 36.4

What is a 2% grade?

Table of Common Slopes in Architecture

Degrees Gradient Percent
0.6° 1 : 95.49 1.0%
1 : 57.29 1.7%
1.15° 1 : 50 2%
1.19° 1 : 48 2.08%

What is a 100% grade slope?

o Degree of slope is measured in degrees from horizontal (0 – 90) ▪ A 45-degree slope is a 100 percent grade.