> For the complete documentation index, see [llms.txt](https://primer2.dynamobim.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://primer2.dynamobim.org/es/dynamo-for-civil-3d/sample-workflows/rail.md).

# Raíl

- [Envolvente libre](https://primer2.dynamobim.org/es/dynamo-for-civil-3d/sample-workflows/rail/clearance-envelope.md)