2.0

Table Of Contents
Defining a Ditch or Transition by Offsetting an Existing Vertical Alignment
233
can be the finished ground centerline or any left or right ditch or transition.
The alignment that is created can be any left or right ditch or transition.
To create a vertical alignment at a uniform offset from the reference vertical
alignment
1 Define the vertical alignment that is to be used as the reference definition.
2 From the Profiles menu, choose DT Vertical Alignments ä Define by
Offset/Grade.
The following prompt is displayed:
Select offset type (Uniform/Alignment) <Alignment>:
3 Type U to select the Uniform offset type.
The following prompt is displayed:
Profile to reference (Center/Left/Right) <Center>:
4 Select the vertical alignment to offset by doing one of the following:
n
Type Center to offset the finished ground centerline alignment.
n
Type Left or Right to offset a left or right profile. You must specify which left
or right profile (or ditch) you want to offset. The following prompt is
displayed:
Select left profile (Ditch/1/2/3/4/5/6/7/8):
n
Type D for Ditch or a number from 1 to 8.
When you have selected the vertical alignment to offset, the following
prompt is displayed:
Profile to create (Left/Right):
5 Type Left to create a left profile, or Right to create a right profile.
A prompt similar to the following is displayed:
Select left profile (1/2/3/4/5/6/7/8):
6 Define the number of the profile to create by typing a number from 1 to 8. This
number is assigned to the new offset alignment. Typically, 1 is used as the first
offset from the centerline, 2 is used as the second offset from the centerline, and
so on.
The following prompt is displayed:
Offset distance:
7 Type an offset distance or pick two points in the drawing to define the distance.
The following prompt is displayed:
Enter grade %:
8 Type the grade for the offset (as a percentage). This value is the grade between
the existing alignment and the offset that will be created. Type a minus sign for
a negative grade.
The command then determines the offsets to the alignment.
9 Import the offset alignment into the drawing profile in order to view it.