## 3D-MC: How to create a sloping plane surface

Learn how to create a sloping plane surface using 3D-MC.

# 3D-MC: How to create a sloping plane surface

## Sloping Plane Surface

Creating a sloping surface is similar to a flat plane surface with the addition of defining the direction of the slope(s).

Creating a Sloping Plane Surface is a simple process.  The operator will need to enter three elements for the sloping surface.

• Elevation: Will set the elevation of the surface as it did when creating a flat plane surface.  The elevation is typically set after the surface has been defined.
• Main Slope: Will define the direction of orientation of the first slope and set the slope grade.  This step is typically done first.
• Cross Slope: Will define the cross slope of the planar surface.

## Sloping Plane Surface (Setting Direction/Grade)

Setting the Main Slope can be achieved a few different ways.

• Direction/Grade: If a GPS heading of the main slope is known the operator can enter the heading value in the Direction Box and set the grade at the defined heading.

## Sloping Plane Surface (Setting Direction/Grade From Points)

Setting the Main Slope can be achieved a few different ways.

• If the operator has a set of points (pad corners) in the points file they can select the points using the select point button.
• When using the select point option the Direction/Grade will be set from the location and elevation of the points.
• The direction and grade can be edited by simply selecting either the direction or grade and changing the values.
• A positive or negative slope is determined by defining the direction of the points selected.  From A to B a slope heading uphill is positive.

## Sloping Plane Surface (Setting Direction/Grade from Topo Shots)

The operator can use the A/B button to take survey shots using the machine to set the Direction and Grade.

• Survey shots will be taken from the last point of the steering the machine used.

## Example

• In this example two hubs have been provided to set Direction and Main Slope. (A/B)
• Position the blade near the Hub A and touch the topo shot button associated with A.
• Move the machine and position the blade near Hub B and touch the topo shot button associated with B.

The Direction between Hub A/B will be set as will the Grade.

• The Grade will need to be manually set as the hubs were for alignment only.
• The N,E,Z values were set from Hub A.

## Sloping Plane Surface (Setting Elevations)

The operator can set the proper elevation by either:

• Selecting a point from the points file which has the correct elevation
• Take a topo shot on a on a known elevation

When using the topo shot option be sure to position the blade where the last steering point was used and set the blade to match the known elevation.

## Sloping Plane Surface (Crossfall)

The Crossfall can now be entered.

• When looking in the direction from A to B a positive slope will flow up tot the right.

The arrows on the Grid lines are showing the direction of fall.