To create a graded region in Revit, you select an existing toposolid in the current phase. Revit then marks the original surface as demolished and creates a copy, with a matching boundary, that is new in the current phase.
Here's a more detailed breakdown:
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Ensure you have a Toposolid: You must have an existing toposolid element representing the existing surface in your Revit model. This surface needs to be in the current phase of your project.
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Select the Toposolid: In the Revit view, select the toposolid that you want to grade.
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Use the Graded Region Tool:
- Go to the "Massing & Site" tab.
- Click on the "Graded Region" tool.
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Graded Region Creation Options: After selecting the "Graded Region" tool, you'll have options:
- Create a new toposurface exactly like the existing one: This is the typical workflow. Revit automatically creates a copy of the existing toposolid.
- Create a graded region from points: This option allows you to create the graded region by defining its boundary based on specific points. This is less common than creating a copy.
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Revit's Actions: When you choose the first option, Revit automatically performs the following actions:
- Demolishes the Original: The original toposolid is marked as "demolished" in the current phase. This ensures it reflects the state of the site before grading.
- Creates a New Copy: A new toposolid is created. This new toposolid is an exact copy of the original and is set to the current phase as "new construction." You can now modify this new toposolid to represent the graded region.
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Modify the New Toposolid: Edit the new toposolid to reflect the desired grading. You can add or subtract points, change elevations, and modify the overall shape of the surface.
In summary: Revit handles the demolition of the original surface and creation of the new graded surface automatically, allowing you to focus on defining the desired grading changes.
