Rib is a special type of extruded
feature created from open or closed sketched contours. It adds material
of a specified thickness in a specified direction between the contour
and an existing part. You can create a rib using single or multiple sketches.
You can also create rib features with draft, or select a reference contour to draft.
of sketches and the resulting rib features.
To create a rib:
the contour to use as the rib feature on a plane that:
Click Rib on the Features toolbar,
or click Insert, Features,
Click OK .