Create side ditch as part of assembly but with a different profile than roadway.

[brianzimmerman]

I am trying to create an assembly with a U channel (side ditch) that's top will follow the sidewalk it is next to but I need the profile of the U channel to be different than that of the roadway. Is there a way to create a custom subassembly part that will do this? Can I create a different allignment/profile for the bottom of the U channel that can then link to the other assembly?

The only other think I can think of is to use a dynamic block to add the U channel to my cross sections, but that will take a lot of time to do.

Any ideas?

Thanks in advance!

[mathewkol]

From the back of sidewalk you can use for example a generic link width and slope. This can target both an alignment and profile of your choice. This will get you a sloped line to the inside bottom of your U ditch. Add more generic links as required to finish the ditch. Complete it with a generic link slope to surface.

Should be very easy.

[sboon]

You shouldn't need a custom sub to do this.  At least one of the OOTB daylight subs can have a ditch that is controlled by a profile.  Check the help files for DaylightBasin, see if that will work for you.