138T and 238T Standing Seam Metal Roofing System

Symmetrical Standing Seam Systems

Great for:

WALLS

ROOFS

RESIDENTIAL

COMMERCIAL

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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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
- 238T Steel - 24’ radius
- 138T Alum - 10’ 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
138T/238T panels can be curved for either Convex or Candy Cane radius applications
Equipment for Curving & Candy Cane style panels is based in Houston, TX but is mobile for jobsite production

See more standing seam curved panels here.

Standing Seam Roofing System Installed on Fire Station

Standing Seam Roofing System on Commercial Building

Standing Seam Roofing System on Industrial Building

138T & 238T Wall Systems

Need a concealed fastener wall panel option with design flexibility and decades-long curb appeal? We have you covered with our 138T & 238T profile.

With panel widths from 16-24”, in-seam sealant, and several different pan conditions, this system can be used to create stunning applications.

Additional Benefits:

Mechanically seamed system offers greatly reduced air infiltration
Symmetrical panel allows for easy panel replacement if necessary for building modifications/repair

Contact a McElroy representative for more information about 138T and 238T wall applications.

Mechanically seamed system offers greatly reduced air infiltration

Symmetrical panel allows for easy panel replacement if necessary for building modificationsrepair

McElroy Metal 138T Plank & Pencil Rib Rendering

McElroy Metal 238T Plank & Pencil Rib Rendering

Specifications & Details

Details

138T Minimum Slope

1:12

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

- 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 (Inquire. Possible minimum order and longer lead time may apply.)

- Optional 16 oz and 20 oz copper (Houston Plant Only) (Inquire. Possible minimum order and longer lead time may apply.)

Details and Components Gallery

138T/238T Seam Cap

138T Clip Standard

238T Clip Standard

138T Multi-Span Clip

238T Multi-Span Clip

238T Retrofit Clip

138T Shingle Recover Clip

138T Before Seaming

138T After Seaming

238T Before Seaming

238T After Seaming