3′ Delta Rib (Special Order Panel)

The Delta Rib Panel offers a conventional metal roofing experience. Based on older design styles,the 3’ Delta Rib, has a trapezoidal shaped major rib that is, 9” on center, ¾” height, and 36” wide after overlap. This panel is very economical, can be cut to length, and usually available in 5-10 business days.

3' Delta Rib Panel


Economical, Easy to Install, Traditional Design, Versatile, For Use on Open Purlins or Solid Substrate.

  • 1 ½” Bearing Length
  • Load Span Tables Based on Working Stress
  • Flexural Design analysis according to AISI “Specification for the Design of Light Gauge Cold
  • Formed Steel
  • Structural Members” May 1981
  • Continuous Span Loading applies to sheets continuous over 3 or more spans
  • Weight of sheet has not been allowed for when calculating live loads and uplift.
  • Deflection (L/180) limiting live loads based on deflection of span
  • Metal thickness based on minimum ASTM specifications for allowable load calculations
  • Loads may be increased by ⅓ for wind loads

Application Details

Slope Requirements

Screw Application

Roof Application

Minimum Slope Requirements


Screw Application

#10 Wood grip fasteners are designed for use with dimensional lumber,  #14 Wood grip fasteners are designed for use with plywood sheeting, OSB, and wafer wood (7/16” minimum thickness). #12 Tek screws are designed to be used with structural steel up to 3/16” in thickness.

Roof Application

Fasteners to be applied along side every rib and attached to each purlin, 2’ on center.  Please note that it is the responsibility of the builder to ensure that purlins are adequately spaced to meet specific engineering requirements.

EPIC Steel is neither partially nor solely responsible for improper installation or defects as a result of installation. *Epic Steel recommends obtaining a color chip prior to placing an order. Please contact your Epic Steel representative to learn more.

Areas of discontinuity are subject to higher spikes in wind pressure, therefore a different coefficient in wind pressure will need to be considered and multiplied by a factor of 1.5

Data From: 1994 UBC Table 16-F

Note: The load tables have been compiled for the design of steel roofing and siding used in conjunction with either wood or steel-framed structures.  EPIC Steel assumes no responsibility, either expressed or implied, for its use.

Technical Specifications

3 Tuff Rib Specs

Span (ft.)Three or More Span Conditions
28 Gauge & 80 ksi

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