CORRIDOR BOUNDARIES/SURFACES

[pwoods238]

Im designing a trench which was created with subassemblies that will be under an existing ditch.

The problem is that I need the excavation shown. When I paste the surfaces the ditch grades up to the top of the trench. I attached some photos of how it looks pasted. It should look like photo 1, but the ditch should be graded like photo 2 continuously so it just drops off into the trench. Both of these are corridors. If i could use a portion of one corridor as a boundary to another that would probably help but im not sure.

I have pasted surfaces

played with the regions

created a tin volume surface and used it as the boundary

[ToddRogers-WPM]

The paste order is important.  Did you happen to try and paste it the opposite way you did?  

[pwoods238]

Yes, Ive also tried the TIN volume surfaces both ways

[ToddRogers-WPM]

I thought you said you were pasting the surfaces?  Pasting surfaces and created TIN volumes are very different.

[pwoods238]

First I tried to paste them, I pasted them both ways.
I also tried to achieve my task with creating a TIN volume surface in which the order matters as well and I tried that both ways and still so solution

[ToddRogers-WPM]

See if this helps...

http://beingcivil.typepad.com/my_weblog/2012/04/autocad-civil-3d-2013-new-features-surface-as-a-hide...