Picture Framing Perforation vs. Cross-Seam Perf
Picture-framing refers to a perforated metal system in which each panel has a "picture frame" or an unperforated border around the edges of each panel.
Cross-Seam Perforation provides a parametric fabrication solution. Panels are perforated across the brake-lines, and when the panel is formed, these perforation will continue parametrically across the surface.
Before Zahner began providing this solution, many designers were left with two choices: either settle for "picture-framing" or settle for thicker metal plates with face-fasteners. Systems with face-fasteners are unsightly from a close distance, and will sometimes be more expensive. This is because these will require a thicker metal to stay rigid, while Zahner panel systems are rigidized by interlocking folded edges.