You can't directly rotate a ceiling grid in Revit. The grid lines are generated automatically based on the ceiling's dimensions and the chosen grid pattern. However, you can achieve the desired rotation by adjusting the ceiling's orientation or using other workarounds:
1. Rotate the Ceiling Element:
- Select the ceiling element.
- Use the Rotate tool (found under the Modify tab) to rotate the ceiling to the desired angle.
- This will rotate the entire ceiling, including the generated grid lines.
2. Modify the Ceiling Shape:
- Create a new ceiling with the desired shape and dimensions.
- Use the Edit Profile tool to modify the shape of the ceiling.
- This approach allows you to create a ceiling with a non-rectangular shape, which can indirectly affect the appearance of the grid lines.
3. Adjust Grid Settings:
- While you can't directly rotate the grid lines, you can change their spacing, direction, and visibility.
- Access the Grid and Datum settings under the Manage tab.
- Modify the grid properties to achieve the desired visual effect.
4. Use a Different Grid Pattern:
- Choose a different grid pattern from the Grid Type dropdown menu in the Ceiling properties.
- Experiment with different patterns until you find one that aligns with your design requirements.
5. Create a Custom Grid:
- If you need a specific grid layout, you can create a custom grid using the Grid tool.
- This allows you to define the grid lines manually, offering greater control over their placement and orientation.
These methods offer various ways to manipulate the appearance of the ceiling grid in Revit, even though direct rotation is not possible. By adjusting the ceiling's orientation, shape, grid settings, and pattern, you can achieve the desired visual effect for your project.