I am trying to create an assembly. I need to to go horizontal for 1.5 feet, then down to existing ground at an 8:1 slope. I need a shape the creates from the origin, down vertical to the daylight elevation, then over to the daylight point. In the attached picture, I need to create the orange shape using the green lines as a guide. Any ideas.
You can add a LinkWidthandSlope to the end of Dayliight. Have it target the centerline as its horizontal target. Add a linkVertical to that and have it target (for elevation) the centerline FG profile.
Thanks. That's a great start. Now can I set the horizontal target offset? I need to create the vertical face on the backside (left) and when I target the horizontal alignment, it akes that link vertical so it doesn't trianglulate.
WAARNING c3d TIn does not like to have vertical faces
Go down from the assembly point with a LinkOffsetAndElevation and then over with a LinkOffsetAndSlope reading in the Daylight's End Elevation and End Offset.
Nothing closer than 0.0001 from each other for the Delaunay triangulation in C3D.
A couple things, unless there is quite the vertical exageration to your drawing, that's much steeper than 8:1. More like 1:8.
Second thing, go ahead and use the vertical link despite what the nay sayers might say (said in all kindness and good ribbing). You can simply set your corridor surface to have an overhang correction. In this case I used Top Links and it worked just fine.
In this image, you'll see two surface, one representing the top from the 1.5' link and the daylight to surface (grey). The other is the datum using the link back to center and the vertical link to the profile (green).
And here is teh assembly set up exactly the way Tim Corey recommended:
And here are the corridor targets:
"...that's much steeper than 8:1. More like 1:8...."
If the OP is in a part of the world (as I am) where slopes are quoted in the correct way i.e. V:H then the slope does indeed look like 8V:1H..
I 'm curious why you would insist he does it that way?
The way I suggested I would contend is much more efficient. He would not have the extra overhead of having to set and manage Corridor Targets and Overhang Correction settings.
This thread illustrates the beauty of Civil 3D. There are several ways to accomplish the same thing.
In this case it is how to handle the overhang. I agree with Brian Hailey about using overhang correction, but another poster showed a way to make it work using just the assembly, so you don't have to remember to set the overhang correction. That might be important in a larger organization where the assembly is created by an expert but applied by a less-experienced operator.
Thanks for the help. Still having some problems. Is a shape defined by links? I need the orange shape to calculate volumes. Does piecing together generic links create a shape or does one need to go into subassembly composer...Which would be another topic for me.
When you mention reading in daylight for elevation and offlset, how do you do this? I tried a corridor feature but the message was feature is created from current corridor.
Just seems like a should be able to make a shape and have the back point to be -.1' horizontal from the origin, the = to daylight elevation for the vertical.
I do apologize as I am coming from InRoads where there templates use general contraints like horizontal and vertical. I do hope with more time to be able to create the crazy templates in C3D the same way I can in InRoads now.