This command modifies 3D curb polylines to fit in a ramp of the
specified dimensions. For input, this command requires three 3D
polylines that define the face of curb (bottom and top) and the
back of curb. There is a dialog to enter the curb dimensions. For
the Pick Method, the Center method places the ramp
centered at the pick point. The Sides method prompts to pick
two points on the curb polylines to define the left and right sides
of the ramp. The Driveway method allows you to create
multiple ramps at once by selecting closed polylines that represent
driveways. These polylines must be closed polylines with two
vertices on the curb polyline. The ramp is fit between these two
vertices. The Separate Pick Position Prompt option prompts
for the curb position point after selecting the curb polyline.
Otherwise, the program uses the position that you select the curb
polyline as the curb position. For the Curb Method, the
Curb Cut Only modifies the three curb polylines and doesn't
draw the ramp polylines. The Elevate Driveway option sets
the elevation of the driveway polyline to match the curb polyline.
For Style, the Taper To End option applies the
Front Taper width to the back of the ramp as well as the
front, the Hold Fixed option uses the full Front
Taper width for the first ramp and then tapers, and the
Taper First Ramp option applies the Front Taper only
to the first ramp. The Separate Curb Taper is the distance
the curb drop before the ramp. Leave this field blank to not use
this curb taper. The Direction Method chooses between making
the ramp perpendicular to the curb or having the program prompt for
picking the ramp direction. The Lip Method controls the
height between the bottom-of-curb and top-of-curb polylines at the
bottom of the ramp. The Ramp Slope method sets the slope
between these polylines to match the ramp slope and the
Height method sets a fixed height. The Slope Method
controls the ramp slope. The Match Curb Height method sets
the slope so that the back of the ramp reaches the original
height of the top-of-curb. The Slope method sets the ramp
slope to the specified value. The Second Ramp and Third
Ramp allow for additional ramps such as for a landing
pad.
After the dialog, the program prompts to pick the curb 3D
polylines to draw the ramp. The existing 3D curb polylines are
modified to lower the curb for the ramp and new 3D polylines are
drawn for the rest of the ramp. Also, the program updates other 3D
linework that crosses the ramp such as sidewalks. These 3D
polylines can then be used for breaklines in surface modeling such
as with the Triangulate & Contour routine.
Curb Ramp dialog
Select curb polyline: pick a polyline
Select curb polyline (Enter to end): press Enter
Pulldown Menu Location: 3D Data > 3D Polyline
Utilities
Keyboard Command:
curb_ramp
Prerequisite: 3D curb polylines
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