PBR (Purlin Bearing Rib) panels and R-Panels are both commonly used in the construction and roofing industries, particularly for metal buildings. While they appear similar, there are some key differences that set them apart. Here's a breakdown:
1. Design and Structure:
PBR Panels: Include an extra purlin-bearing leg (hence the name) that provides additional support and overlap where panels meet. This feature enhances the strength and reduces the likelihood of panel sagging at the purlin connections.
R-Panels: Lack the purlin-bearing leg, which makes them slightly less rigid at overlaps compared to PBR panels.
2. Overlap and Installation:
PBR Panels: Easier to install on purlins due to the purlin-bearing leg. The overlap ensures a tighter, more secure connection and improves water resistance.
R-Panels: Typically installed with a simple overlap that doesn’t have the additional bearing support. This makes them slightly more prone to water infiltration at the seams in less-than-ideal conditions.
3. Strength and Durability:
PBR Panels: Offer superior strength due to the extra purlin-bearing support, making them better suited for heavy-duty applications and longer spans.
R-Panels: Generally strong but may require additional purlins for equivalent performance, particularly in areas with heavy snow or wind loads.
4. Applications:
PBR Panels: Commonly used for both roofing and wall applications on commercial, agricultural, and industrial buildings. Their enhanced strength makes them ideal for projects requiring high durability.
R-Panels: Often used in less demanding applications, such as for walls, light-duty roofing, or temporary structures.
5. Cost:
PBR Panels: Slightly more expensive than R-Panels due to the added material in the purlin-bearing leg.
R-Panels: Lower cost makes them an economical choice for projects where the added strength of PBR is not required.
6. Appearance:
Both panels look very similar with trapezoidal ribs, but upon close inspection, the additional purlin-bearing leg on PBR panels becomes noticeable.
Summary:
If you’re working on a project that requires maximum durability and reliability, especially for roofing, PBR panels are the better choice. For lighter-duty or more cost-sensitive projects, R-Panels can be a good option. Both panels are widely used in the industry and perform well in various applications when installed correctly.