Mechanical Lock

Architectural Mechanically Seamed Panel System


Mechanical Lock Standing Seam

The Mechanical Lock (ML-100 & ML-150) panel system features structural performance as well as architectural aesthetics. ML-100 and 150 panels can be factory formed and/or fabricated, for all substrates, at project locations. Utilizes concealed fasteners with a fixed and/or floating clip system.

The Mechanical Lock panel system presents a reliable and efficient solution for roofing and wall cladding projects in various construction applications. Known for its secure interlocking seam and durable construction, these panels offer durability and versatility for both commercial and residential buildings.

Featuring a concealed clip system, the Mechanical Lock panel system ensures tight seams and enhanced weather resistance. This design prevents water infiltration and provides reliable protection against adverse weather conditions, making it ideal for regions with extreme climates.

Available in two rib heights—1″ (ML-100) and 1.5″ (ML-150) —the Mechanical Lock panel system offers enhanced versatility to accommodate different design preferences and structural requirements. Whether it’s a sleek and modern look or a more traditional aesthetic, these panels provide flexibility for various architectural styles.

Designed to provide structural integrity, Mechanical Lock panels is suitable for a wide range of construction projects. From commercial warehouses to residential homes, these panels offer reliable protection and long-lasting performance in demanding environments. Mechanically locking panels are built to withstand the test of time. Their durable construction ensures longevity and resilience, reducing the need for frequent maintenance and repairs over the lifespan of the building.

Panel Features

Panel Features Include:

  • 24 gauge steel (standard)
  • 22 gauge steel (optional)
  • 26 gauge steel (optional)
  • Substrate Materials:
    • Galvalume (standard)
    • Galvanized (optional)
  • Colors available on standard, premium and metallic.
  • Rib Spacing: Varies based on panel width chosen
  • Rib Height: 2”

Testing & Performance

Panel Certifications Include:

  •  UL Construction Number: TGKX90, TGKX180, TGKX180, TGKX238, TGKX238A, TGKX238B,TGKX298, TGKX437 TGKX449, TGKX451, TGKX452, TGKX482, TGKX487, TGKX633 and TGKX639.
  • Uplift resistance of prepared roof-covering materials
    • UL 580 Class90.
  • Impact resistance of prepared roof-covering materials
    • UL2218 Class 4.
  • Fire tests of roof coverings
    • UL 790.
    • Class A, B, C. External fire exposure.
  • TDI Texas Approved
  • UL Certified

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Panel Details

Panel Profiles

1″ Mechanical Lock (ML-100)

ml-100 profile


1.5″ Mechanical Lock (ML-150)

ml150 profile

Mechanical Lock is suitable for use on the following environments:

  • Extreme High Temperatures
  • Low Temperatures (Freeze/Thaw)
  • High Wind Environments
  • Hail Prone Regions
  • Fire Prone Regions

Mechanical Lock is suitable for use on the following building locations:

  • Roofing
  • Siding
  • Roof: 12-20″ Finished Coverage
  • Wall: 12-20″ Finished Coverage
    • Smaller panel widths available upon request
  • Standard Thickness: 24 gauge steel
  • Optional Thickness: 26 gauge steel*
  • Optional Thickness: 22 gauge steel*

*Longer lead times may apply

  • Concealed clip system
    • Fixed clips available
    • Floating clips available
    • Stand-off clips available
  • Mechanical Lock can be roll-formed on-site to custom lengths.
  • Max shippable length is determined by the local trailer restrictions.
  • Texas Max Length: 53′

Contact your helpful team member for max lengths in other states.

  • ML-100: 1″ Rib Height
  • ML-150: 1.5″ Rib Height

Minimum slope:

  • 0.5:12 w/ mastic
  • PVDF – 40 year
  • SMP – 40 year
  • Bare Galvalume – 25 year

Panel Documentation

Specification Guide

Installation Guide

Looking for Additional Information?

Still have a question about this or other panels? Check out our range of articles on metal roofing, siding, coils & flats, and other industry information below.