Uploaded April 2014 | Updated September 2026, 3 hours ago

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Louvers are created when the sheet metal is cut ("lanced") and formed simultaneously. Closed end louvers are cut on one side and the material adjacent to the cut edge is raised to create the opening in the sheet. Louvers can vary in width and length, and may have an angled or radius form profile.

Closed end louvers offer a high strength configuration with no exposed corners. With their smooth edges and round, enclosed corners, closed end louvers serve best on exposed panel surfaces.