Creating Grade Limits Automatically

Because grade limits are often associated with a pad or other type of site modifier, the Vectorworks Landmark product can create grade limits automatically around a site modifier, based on specific parameters. Grade limits can be created with a gradual sloping transition from the existing site contours to the modifier, placed at a variable or fixed distance from the modifier. The grade limits cut and fill the site model to create a constant slope (batter slope).

To create grade limits automatically around one or more site modifiers:

1. Select the site modifiers which require the grade limits. Valid modifiers include pads, road objects, massing models, and landscape walls.

2. Select the Create Grade Limits from Pad command from the appropriate menu:

●    Designer workspace: AEC > Terrain > Create Grade Limits from Pad

●    Landmark workspace: Landmark > Create Grade Limits from Pad

The Create Grade Limits from Pad dialog box opens. Select the grade limit parameters.

►    Click to show/hide the parameters.

Parameter	Description
Grade Limits Offset Control
Distance	Creates the grade limits at a fixed offset distance
Batter Slope	Creates variable offset grade limits based on slope (the slope variation determines the offset; the grade limits are located at the intersection of the slope and the existing terrain)
Max. Offset	Sets the fixed offset distance for Distance offset control, or specifies the maximum offset distance allowed for Batter Slope offset control
Slope Definition	For Batter Slope offset control, select the method of specifying the slope value: ●    Angular: specifies the slope in degrees, radians, or gradians (example: 26.7°) ●    Rise-over-run: specifies the slope as a ratio of vertical change to horizontal change (example: 1:3) ●    Percent: specifies the slope as a grade percentage (example: 50%)
Max. Slope	For Batter Slope offset control, specifies the maximum allowable slope (in the selected units)
Slope Control Options
Use Midpoints	Enables additional testing points for a more uniform slope
Test Increment	Specifies the number of midpoints to test; a smaller increment distance increases the accuracy of the slope calculations, but can also increase the time to create the grade limits (the minimum increment is 12”)

3. Click OK to create the grade limits.

4. To reflect the grade limit modification, select the site model and click Update from the Object Info palette.

~~~~~~~~~~~~~~~~~~~~~~~~~

Creating a Pad or Pad with Retaining Edge

Updating a Site Model

Site Model Modification Overview

Was this page helpful?