Purlin Bearing Rib (PBR) Metal Panel
Evolution's Purlin Bearing Rib (PBR) panel is engineered for performance on low-slope roofing systems and large-scale wall assemblies. Designed with a 5° overbend and a supportive purlin leg, the PBR panel enhances bearing strength, waterproofing, and fastener reliability.
Whether you're building an agricultural shed, warehouse, or commercial enclosure, PBR delivers an economical solution with high durability. Add Dripstop lining to your PBR configuration for enhanced vapor barrier performance and condensation control under humid conditions.
Technical Specifications
| Feature | Specification |
|---|---|
| Roof Coverage | 36" |
| Wall Coverage | 36" |
| Panel Gauges | 26, 29 |
| Fastener Options | Exposed |
| Panel Length | 3' to 43'+ Longer lengths available upon request |
| Rib Height | 1.25" at 12" centers |
| Roof Slope | 1:12 or greater with mastic |
| Impact Rating | UL 2218 |
| Wind Uplift Rating | ASTM E1592 |
| Warranty | Based on Paint System — CMG / United Steel Supply |
Overlap & Underlayment System
Reinforces overlap to ensure a consistent, tight seal between metal panels.
Built-in moisture defense system that minimizes water intrusion at panel seams.
High Temp Ice & Water shown — essential for valleys and low-pitch roof sections.
Image shows installation over plywood. Compatible with open framing spans up to 60”.