+Build Surfaces in Style
Four part boundary made up in parts as shown.

+Merge
The surfaces are in separate parts and now need to be merged. Do so upon exiting from the Style feature.

+Note
The surfaces by default try to remain tangent as they are built.

+Mirror the thing
Use 'Mirror Geom' to duplicate the entire product about the 'FRONT' DTM

+Merge
The two halves need merging.

+Next
Extrude or Sweep the surface as shown. Consider this choice carefully since one is more limiting while the other may leave the designer more options later down the design cycle.

+Merge
Merge the remaining surfaces.

+Solidify the thing
Feature Create Solid Use Quilt.

+Next
The next features for shelling. In many cases, surfaces like this will not shell and the designer will be forced to offset the surfaces that will offset and patch the surfaces that fill the gaps. See 'Shelling by Offset' tutorial

+Shelling
The completed shell and rounds.

+Next
Build the Master Model or Skeleton or Publish Geometry. You may choose to delete the solid and shell for building after the piece parts are split using Master or Skeleton, or Publish Geometry.

+Typical
The next features are a combination of Pro/SURFACE trims and Superfeatures for offsetting nominal wall and publish geometry. Most is a bit out of scope for this workshop. We do However, offer a three day workshop in offset surfaces for shelling called our Pro/SURFACE level 5 workshop. Primarily dealing in import geometry, these tutorials focuses on offsetting geometry to create nominal wall instead of Shelling.

+END