2⅜” Field-Lok

2⅜” Field-Lok

Panel Details:

Seam Detail
Seam Detail
Triple Lock
Triple Lock

The 2⅜” Field-Lok, FLS Series, standing seam panel features a Triple-Lok design that has been proven to outperform all roof systems in testing for wind uplift resistance. The Field-Lok incorporates a “hooked in” standing seam with a double-folded design to resist seam failure between supports, inhibit sidelap unfurling or unzipping, and add structural integrity to the roof system. Installed with expansion clips, Field-Lok accommodates for expansion and contraction of the roof system. The adjacent panel conceals the fasteners and clips. A power-driven mechanical seamer is used to interlock the panels at the site. Field-Lok has the flat pan/vertical rib profile preferred by architects for superior performance with traditional appearance. Because of its strength, watertightness and aesthetics, Field-Lok meets the new stringent building codes and specifications and is suitable for a wide range of climatic conditions. The extra-high locked standing seam adds structural integrity to the roof system.


Contractors and erectors are now able to rent roof seamers directly from our supplier, Developmental Industries (DI). Renting directly from DI, by visiting atas.diroofseamers.com, will provide an even quicker, more efficient ordering process and allow you to communicate directly with their knowledgeable staff regarding logistics and technical issues.


Florida Building Product Approval: FL 3556.3




.032, .040 aluminum
24, 22* ga. metallic coated steel
24 ga. 55% Al-Zn alloy coated steel with acrylic coating

Panel Coverage:

(Stiffening ribs standard, specify without ribs or with striations)

Minimum Panel Length:


Maximum Panel Length:

Transportation limitations and/or product and project design considerations

Seam Height:



Factory panel pre-notching available.
Contact ATAS for specifics.


Stucco Embossed (available in 24 ga. steel, .032 & .040 aluminum)


70% PVDF


Choice of over 40 stock colors
Custom colors and finishes available*


Clear Satin
Dark Bronze


A complete line of trims available in matching colors, gauge, and finish or as specified.

Minimum Slope:

½” : 12

Florida Building Product Approval:

FL 3556.3

MCA Certification:


Optional sealant is available


*Subject to minimum quantities and extended lead time
Inquire for material and panel coverage availability