^^Further to Readhead's comments above^^
"SSR" is actually a trademarked name for Varco Pruden's 3" trapezoidal standing seam roof. Similar 3" deep x 24" wide 22-24-gauge trapezoidal SSR is offered by many other manufacturers and is designed to for metal building purlin spans. Most of these panels are UL/FM/Miami-Dade tested and rated accordingly. All the major PEB manufacturers offer some version of this panel, Ultra Dek is MBCI's house brand. Butler's MR-24 panel has probably been around the longest. Nucor Buildings, American Buildings, and others all offer similar SSR panels. Some are proprietary, some are produced under license from BRS, the leading designer of industrial roofing panels in the US. All perform very well when installed correctly. . These panels require a field seamer, special clips, end dams, ridge caps, etc. It's a very well engineered but expensive roof system, produced with factory injected mastic to help seal the panel seams. The narrower widths, shallower pan depth panels are architectural, designed to be installed over solid sheathing. Many of these panels are not performance tested or rated, can be produced inexpensively on site like continuous gutters, often in as light as 29-30 gauge material. When it comes to standing seam roofing, you generally get what you pay for.
