Autodesk AUTOCAD PLANT 3D 2011 - SYSTEM REQUIREMENTS, Tutorials Manual

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For more information, see the AutoCAD Civil 3D Help topic Editing Feature
Lines.
Create a stepped offset feature line
1 Open Grading-6.dwg, which is located in the tutorial drawings folder (page
819) .
2 On the command line, enter OffsetGapType. Enter 1 as the value.
The OffsetGapType variable controls how potential gaps between segments
are treated when closed polylines, such as the building pad feature line,
are offset. Setting this variable to 1 fills the gaps with filleted arc segments;
the radius of each arc segment is equal to the offset distance.
3 Click Home tab
➤
Create Design panel
➤
Feature Line
drop-down
➤
Create Feature Line From Stepped Offset .
4 On the command line, enter 1.5 as the offset distance.
5 In the right viewport, click the blue feature line representing the building
pad when prompted to select a feature line.
6 Click outside the building pad when prompted to specify the side to
offset.
7 At the command line, enter G to specify a grade value. Enter -1 as the
grade.
8 Press Enter to end the command.
The stepped offset feature line is displayed. Notice that in the left
viewport, on the left side of the ramp, the curve of the stepped offset
feature line is not well formed. Because it is an independent feature line,
you can use the feature line editing tools to refine the solution.
406 | Chapter 11 Grading Tutorials