2.0

Table Of Contents
Defining Templates
305
3 Do one of the following:
n
Press ENTER if the surfaces are symmetrical and you drew only the left side
of the template.
n
Type N for No if the surfaces are asymmetrical and you drew the entire
template.
To view a illustration that shows symmetrical and asymmetrical templates, see
Defining a Template that Only has Normal Surfaces in this chapter.
NOTE
Symmetrical surfaces are not physically mirrored at the centerline during
the Define Template command. The template must be imported in to the
drawing using the Import Template or Edit Template command to see the
right hand side.
4 Select all of the objects that make up the template by picking them from the
drawing.
You can either select each surface individually or use a window or crossing
window to select the template surfaces. Each surface must be made up of a 2D
polyline created with either the AutoCAD PLINE command or the Draw
Template command. When you are finished selecting objects, press ENTER at
the Select objects prompt.
The command highlights the first surface you selected and displays the
following command line prompt:
Surface Type (Normal/Subgrade) <Normal>:
5 Type S and press ENTER to select the subgrade.
The following command prompt is displayed:
Subgrade depth:
6 Type the depth of the subsurface material at the centerline of the template, and
press ENTER.
The following prompt is displayed:
Subgrade match grade percent:
7 Type the grade percent at which the bottom of the subgrade extends to intersect
the ditch slope or design slope, and press ENTER.
The following prompt is displayed:
Subgrade match type (Grade/Vertical) <Grade>:
The subgrade match type defines how the subgrade will match into the
template design slope.
8 Choose the match type option you want:
n
Type Grade to draw the subsurface out to the design slope. The Grade option
is more appropriate in rural road design where you are matching the
subsurface out to where it meets the ditch.
Q
Type Vertical to also draw the subsurface out to the design slope, but use
this option in urban road design situations when you do not want the
subsurface to match out to a ditch. Using this option, you can design the
template so that the subsurface stops at a specified offset from the
connection point out on the template. If you specify the Vertical option,
then you are prompted for a subgrade vertical offset modifier. This offset