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).

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

The Create Grade Limits from Pad dialog box opens. Select the grade limit 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
Max. Slope	For Batter Slope offset control, specifies the maximum allowable slope (in degrees)
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”)

Creating Grade Limits Automatically

Parameter

Description