(under subclass 596) Subject matter wherein the web or sheet or a component thereof, has one or more portions which project or protrude from a nonthickness surface of the component and form at least a part of the periphery of a through opening therein.
SEE OR SEARCH THIS CLASS, SUBCLASS:
132+, for a corresponding nonmetallic* sheet, web or component.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings),
740.6+, for a rigid elongated structure with struck out projections.
