Join Josh Modglin for an in-depth discussion in this video Offset alignments, part of AutoCAD Civil 3D Essential Training.
- [Instructor] In addition to a regular alignments that define a baseline, we can also have alignments that are associated to that baseline, that are offset. And so we're going to look at creating offset alignments in this exercise. I'm going to go ahead and open up our Align Offset exercise. We have the geometry, or the alignment that we've been working on throughout this chapter. And if I select that alignment, notice in the Launchpad panel, of the Contextual Ribbon, we can create offset alignments.
So I go ahead and do that, it says alignment offset. These are going to be alignments that are created. So they're called offset alignments so of course they're still 3D objects that must be named. The length of the alignment offset. How many to offset to the left or to the right. The distance in the direction to offset. And then of course, what label to apply. Our alignment style, and then label set.
Since these really represent the edge of the road, I don't want to apply any labels to them. So we're going to choose a label set that has no labels added at all. Go ahead and click okay. And notice the new alignments added in the drawing. Now the power of offset alignments really is shown when we begin to add widenings. So I'm going to select the right side offset alignment, and notice there's a little plus sign in one of the grips that we have.
This grip allows us to change the width that's offset, the distance from 12 to something greater or less. But we're going to go ahead and click the Add Widening. It adds another offset, so to speak, built-in. It's when we go from one lane to two lanes, or we can have a bus turnout or something added, and it's all dynamic to the parent baseline. Now obviously this doesn't look exactly the way we want it to. So we can use the grips to slide the location of that widening.
We can change the width of the widening. So I can go ahead and pick this grip. And we can type a number in, something like 25. And then here is where we have the taper. And so I can pick on the middle grip, and then the transition grips come up and we can actually set a taper. Now all of these different things we can do with grips, but often times it's so much easier to do it in in the Offset Parameters. So what am I in? I have a contextual ribbon for the Offset Alignment.
Modify panel, choose Offset Parameters. It opens up and asks us some information such as how do you want to do a transition? We can do a linear transition which is the standard and probably easiest to build. But you can get fancier with your design, having curve then line then curve. And so on. Though we're going to stick with Linear. Our transition length, is going to be 50 feet. Our offset is only going to be 24. Now the offset here is coming from the baseline.
So we've gone 12 to our first lane, another 12 to our second lane. And so we have these different information here that we can adjust as well. And change the location as graphically by gripping these as well. So we can change the start station of the widening and even the legnth of the widening throughout. Go ahead and click okay. And now that looks like we're adding a right turn lane. Again, all of these items are dynamically linked to the parent.
So if I grip edit the parent, notice that the offset alignments follow. So a very powerful way to create some of the geometry. Now there are some drawbacks to it as well versus just regular AutoCAD line work. But very powerful in its dynamic nature, and did you notice in the Alignment Properties, the ability to have additional settings as well. All of these different alignments have alignment properties including masking, which allows us to create a trim-like look in certain situations.
As well as other settings. So make sure you take advantage of the Alignment Properties for the baseline. I'd escape, but there's also alignment properties that will be different for our offset alignment. Such as Offset Parameters that we have as well. A lot of power here in very simple geometry. The simplest, really, within Civil 3D.
This course gets you up and running with AutoCAD Civil 3D. First, instructor Josh Modglin shows how to model a surface, lay out parcels, and design geometry, including the making of horizontal alignments and vertical profiles. Next, Josh demonstrates how to create corridors, cross sections, pipe networks, and pressure networks. Then, he covers working with feature lines and grading objects, and how to share your data. He wraps up by providing an overview of plan production tools.
- Navigating the Civil 3D interface
- Using point groups and description keys
- Importing survey data
- Managing figures
- Creating and analyzing surfaces
- Creating parcels
- Working with alignments
- Working with profiles and profile views
- Working with assemblies and subassemblies
- Creating Basic and Advanced Corridors
- Using an Intersection Object
- Making sample lines, cross sections, and section views
- Creating a pipe network
- Understanding pressure parts
- Creating and editing feature lines
- Creating and editing grading objects
- Sharing and referencing data
Skill Level Beginner
Some of the exercise files do not properly function.
This course was built to work with the latest release of AutoCAD Civil 3D. If you are not running AutoCAD Civil 3D 2018 there are some exercise files that will not work for you.
AutoCAD Civil 3D: Designing Residential Projectswith Eric Chappell3h 11m Intermediate
AutoCAD Civil 3D: Designing Gravity Pipe Systemswith Eric Chappell3h 33m Intermediate
1. What Is Civil 3D?
What is Civil 3D?4m 43s
2. Civil 3D Interface
3. Establishing Existing Conditions
4. Modeling a Surface
5. Layout of Parcels
6. Design Horizontal Geometry: Alignments
7. Designing Vertical Geometry: Profiles
8. Civil 3D Corridors
10. Gravity Pipe Networks
11. Pressure Part Networks
12. Feature Lines
13. Grading Objects
14. Share Your Data
15. Plan Production Tools
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