Ultra-seam-roof-panels, ultra seam has profiles that are suitable for spanning over open framing purlins on typical spacing, or laid directly over rigid insulation and / or solid decking. many combinations of panel widths, rib heights, and seam profiles provide extensive application and design flexibility. curved panel options are available.. The ultra seam us-200 panel has been extensively tested in both steel and aluminum,and meets the stringent requirements of the “standard test method for structural performance of ssmrs by uniform static air pressure difference,” which has been adopted as astm e-1592.