Hi @ryan.beisaw, do you want to do that with Civil 3D out of the box subassemblies? or you are trying to create a custom subassembly in Subassembly Composer?
1. With Autodesk subassemblies, I would build my corridor and see the locations where the terrain surface is not enough for the slope to intercept it. Then I would create a polyline along these locations and place them in a separate layer. Then I would create two ConditionalHorizontalConditional, (1 Found, 1 Not Found type) to place the corresponding slope depending on the condition. For both conditionals, the target would be the polyline, which you can assign quickly harnessing the layer.
2. With subassembly composer, I'd be happy to assist you with a little more information about what you are trying to do.
I hope this helps.
Regards!
Camilo Fernández
Civil engineer | Specialist in design, construction, and maintenance of roadways
So, you can see in the first pic where the corridor doesn't intercept the existing grade. In those areas, left and right. What id like to do is set up a conditional assembly where it looks for the surface and if it doesnt find it then continues down to a specific elevation.
the above assembly is what i was using for link to slope. I just dont understand how a cut or fill conditional will work for me. If theres a different conditional to use im not sure where to get it from.
Thanks for your help.
