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Purlin Bearing Rib

Structural R Panel Roofing and Siding Systems

Bridger Steel's Purlin Bearing Rib (PBR) Panel is an exposed fastener R steel panel suitable for residential, commercial and agricultural applications. This steel panel can be used in both interior and exterior applications, including R Panel Roofing. It works well as a steel panel for roofing or siding on the exterior of a building or home, and as an accent wall on the interior.

The PBR steel panel features a 5 degree overbend on overlap combined with an anti-siphon groove on underlap for superior weather tightness. Steel R panel roofing will stand up to harsh weather environments with ease. Its strength and adaptability make it a highly sought after steel panel for homeowners, contractors, and architects alike. Whether you're using R panel roofing or siding, you'll love the longevity of these metal sheets.

Examples of Use

For the architect, builder, or general information regarding building examples shown with this steel panel, please contact marketing@bridgersteel.com. Bridger Steel does not release personal information or locations of projects due to owner privacy.

Panel Color Options

26 Gauge Colors

Panel Profile

PBR cropped


Product Applications

Metal Roofing, Siding and Accents

Suitable for regions prone to hail.
Suitable for regions prone to high snow volume.
Suitable for regions prone to high winds.
Suitable for regions prone to extreme temperatures.
Suitable for low pitch conditions.
Suitable for Solar Panel mounting.
Available in Cool Roof certified colors.
Suitable for Rainwater Harvesting.
Can be installed over an open purlin system or a solid substrate.
If used for a roofing application, use bead mastic on the overlap.
A quality high temperature, ice and water underlayment on all roofing applications is recommended.

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Product Details
Panel Overlap

PBR Install

Anti-Siphon Groove: Creates an internal air gap at panel overlap to help prevent water intrusion. 

Underlayment: High Temp Ice & Water shown. For use at eaves and valleys.

Substrate: Plywood substrate material shown. Can be installed over open framing. 

Recommended Environments
  • High Wind Environments (ASTM E1592)
  • High Snow Volume
  • Extreme Temperatures (Select Colors)
Finished Coverage
  • 36"
Panel Gauges
Fastener Options
Panel Length
  • 3' to 50'
Rib Height
  • 1.25" at 12" Centers
Recommended Roof Slope
  • Minimum 1:12 or Greater with Mastic
Available Paint Warranties

Warranties are based on paint systems. Contact a Bridger Steel team member for warranty options. 


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