Need a New Roof? How Building Owners Reduce Cost with a Metal Roof

138T and 238T Standing Seam Roofing Systems

While standing seam roofing systems have been used for generations, 138T and 238T panels feature technological advances in roofing that set a new standard for standing seam performance. 138T and 238T systems are classified as symmetrical standing seam systems that feature mechanically seamed caps.  This product family offers many advantages including patented recover solutions featuring the industry's best method to recover existing metal or shingle roofs. The most important advantage of the 238T and 138T systems are that they are easy to repair or alter after installation. Unlike asymmetrical standing seam systems, individual 138T and 238T panels can be removed and replaced. With Galvalume roof life expectancy approaching 60 years, this ability to replace individual panels is very important.  Mechanical seamers and hand crimpers are available for rent through Developmental Industries (DI) at mcelroyseamers.com.

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View a video showing seam cap and panel removal

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Great for

Walls

Walls

Roofs

Roofs

Residential

Residential

Commercial

Commercial

138T and 238T advantages include:

138T & 238T Wall Systems

Although designed for roof systems, 138T and 238T panels can be utilized as a wall system. This award winning Champions Hall project at the University of Arkansas demonstrates the aesthetic appeal of a 238T wall panel system.

Contact a McElroy representative for more information about 238T wall applications.

Specifications & Details

Details
138T Minimum slope 2:12
238T Minimum slope 1/2:12
1/4:12 considered with prior approval
Installation - 138T must be installed over solid deck
- 238T can be installed over solid deck or open framing
Manufacturing Facilities -Panels can be factory or jobsite formed
-Factory forming at Clinton, IL; Peachtree City, GA; Adelanto, CA; Houston, TX;
Note 138T & 238T are mechanically seamed profiles
Note Oil Canning is a natural occurrence in metal panels and is not a cause for panel rejection
Testing
138T/238T - Uplift test: UL 580 Class 90; ASTM E 1592
- Fire Rating: UL Class A
- Impact Resistance: UL Class 4
238T Only - Uplift: FM4471
- Air Infiltration: ASTM E1680
- Water Infiltration: ASTM E1646
- Static Water: FM 4471 Appendix G, ASTM E2140
- Texas Department of Insurance: RC-270
- Florida State Approval: FBC #16606.1; #16606.2; #16606.3
- Miami Dade Approval: NOA #15-1216.03
- ICC-ES Approval: ESL-1082
- FM Class: 1-SH
Testing Data For available Test Data, Section Properties or Load Tables, please visit our downloads section.
Panel Options
Panel Height & Width 138T: 1 3/8" x 12", 16", 18"
238T: 2 3/8" x 16", 18", 24"
238T: 24" Panel formed on-site only
Panel Configurations - 138T (16" & 18"): Flat, Striated, Plank & Pencil Ribs, Plank, Minor ribs (Plank & Pencil Rib recommended)
138T (12"): Flat, Striated, Minor Ribs, Plank (Plank recommended)
- 238T: Flat (16" & 18" only), Striated, Plank & Pencil Ribs, Plank, Minor Ribs (Plank & Pencil Rib recommended)
Coating Kynar 500® (PVDF)
Substrate - Standard 24 GA Galvalume®
- Optional 22 GA Galvalume
- Optional .032 and .040 aluminum
- Optional 16 oz and 20 oz copper (Houston Plant Only)

Curving Information

  • 138T panels can be curved (16”, 18" width only)
  • 238T panels can be curved (16”, 18” widths only)
  • 138T, 238T and Multi-Span Clips are curved onsite by McElroy curving technicians
  • Minimum Radius:
    138T Steel - 10’ radius
    138T Alum - 10' radius
    238T Steel – 24’ radius
    238T Alum - 14' radius
  • Multi-Span Clips - 35’ radius
  • Maximum length on Multi-Span clips is 30’
  • 138T flat panels will curve naturally on a radius of 150’ or greater
  • 238T flat panels will curve naturally on a radius of 225’ or greater

Curving Photos

Related Files

Brochures

Information Flyers

Product Approval Report / ICC-ES Approvals

Get A Submittal Package

138T - 12"
Customize (Recommended)

Customize your submittal package 138T - 12"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

138T - 16"
Customize (Recommended)

Customize your submittal package 138T - 16"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

138T - 18"
Customize (Recommended)

Customize your submittal package 138T - 18"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets

238T - 16"
Customize (Recommended)

Customize your submittal package 238T - 16"

Click on your desired documents below to select them for your package.

General Product and Warranty Information

Panel Load Tables w/Section Properties and Testing

Safety Data and Material Safety Data Sheets