|Select a path and two profiles with nested loops|
|Extremely unhelpful error message when you try to create a form|
How to create a hollow section sweep in the CMEThe first step is to create an adaptive component profile that only has a single chain of lines/arcs - this is by nature a flat 3D family.
- Then the profile can be loaded into another adaptive or mass family (external or in-place)
- Host the adaptive profile on the sweep (preferably using points to get maximum control). Refer to the post on swept blends for more detail.
- In this example I have only hosted one profile at each end of the sweep, and they are the same size, but you could have different sizes and intermediate profiles to create a lofted form.
- Select the path and two profiles
- Create Form - it should create a solid sweep form providing the path is not too tortuous for Revit to handle.
- Place two more profiles (smaller this time), preferably hosted on the same points
- Select the same path plus the two smaller profiles
- This time create a void (use the drop down arrow on the Create Form icon)
- Revit should then carve out the inside of the sweep to create a hollow form
Voila - a hollow steel section sweep. Both the solid and void forms are hosted on the same sweep path so they will move when it changes.