Civil 3D Get Poly Curve from corridor shape or Idea to generate solid from corridor

DesignScript
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1

Hi All,

Can anybody suggest an idea to generate a solid from a corridor? The planned task details are as follows:

I want to generate lofted solid for the corridor shape to assign metadata, such as region details and individual solid details. The main problem I am facing is that I haven’t found any method in the corridor class to extract the corridor or get a polycurve from the corridor shape.

One more thing, in our whole project, we are using Civil 3D 2022.
If any other information is required, please mention it in the comment section.
Thanks.

2

Well, you can’t extract solids directly using API in C3D 2022.
If you are able to upgrade I suggest at least 2023 as this is possible from version 2023.2:

As an alternative option, theoretically, if you create corridor sections you can use the SectionPoints Property to access section points and recreate shapes for Dynamo to loft solids.
https://help.autodesk.com/view/CIV3D/2025/ENU/?guid=ae047b27-4c49-e496-9486-6649e2228764
https://help.autodesk.com/view/CIV3D/2025/ENU/?guid=c19d4bb4-c946-9c3e-34f3-5c1a78903702
I have no idea how complicated this method would be, so if you really need this and you have access to newer versions I advise you to upgrade to 2023 or above.