The rotation angle in the panel properties is used to control the orientation of the panel span. For reinforced slabs the X direction reinforcement is aligned to the span.
Panels defined by a level
When the rotation angle = 0
- Span direction aligns with global X
When the rotation angle = 90
- Span direction aligns with global Y
Panels defined by a frame
When the rotation angle = 0
- Span direction is horizontal
When the rotation angle = 90
- Span direction is vertical
Panels defined by a sloped plane
Note: In a sloped plane positive Y is always aligned to the up-slope direction, so that positive X is always perpendicular to the slope.
When the rotation angle = 0
- Span direction aligns with X direction of the slope (i.e. perpendicular to the slope, as shown below)
When the rotation angle = 90
- Span direction aligns with Y direction of slope (i.e. parallel to the slope, as shown below)