Sweep Solids
Sweep solids result from ‘sweeping’ a contour along a predefined path. The path can be defined in one of three ways.
· 
Polyline: Produces a sweep solid which is ‘open’ at the start and end, and which can be used to create, for example, baseboards in a room which cannot form a closed solid since they start and end either side of a door frame.
· 
Polygon: Produces a closed solid in which the end points meet and which can be used to create, for example, ceiling moldings at the junction of wall and ceiling.
· 
Contour / Path: Produces a solid which follows a contour or path made up of 2D elements. Several individual 2D elements must first be combined to form a contour. This option is useful for producing, for example, a path consisting of lines and arcs, as would be required to create a drainpipe.
More:
Inputting Sweep Solids
Polylines, Example for Baseboards
Poylgon, Example for Ceiling Moldings
Contour / Path , Example for a Drainpipe