Shell

Shell creates a thin-walled solid from another solid. In this example, all the walls of the box are offset to create a rectangular void in the center of the solid.

If you are using a hidden line view or shaded view, results of the shell design feature are not visible, but if you cut the solid, you can see the void.

You can optionally select faces of the solid not to offset. The faces that are not offset create openings into the void.

To create a shell:

1. Select Construct tab > Solids > Modifiers > Shell to display the Shell dialog.
2. Optionally enter a Name for the solid, or leave the default name.
3. Enter the Offset distance. A negative distance offsets the faces into the solid. A positive distance offsets the surfaces out of the solid.
Note: For solids with tight regions or fillets, you cannot offset the faces more than the smallest fillet radius or the smallest gap between faces.
4. Select the name of a solid from the Offset this solid list or click the Pick solid button and select the solid in the graphics window.
5. If you want to exclude any faces, select the name of the face in the Faces to not offset list and click the Add button or click the Pick surface button and pick the faces in the graphics window.
6. Click Preview to preview the results.
7. Click OK.

Note: If the Offset distance is too large, the offset surfaces intersect and cause an error. Your only choice in this situation is to use a smaller Offset distance.