Kawneer Co. Inc.’s AA425 Thermal Entrances, AA4325 OptiQ Ultra Thermal Fixed Over Project Out Window and IR501 UT (Ultra Thermal) Framing have been tested to meet Department of Defense (DoD) and Interagency Security Committee (ISC)/General Services Administration (GSA) requirements, as well as ASTM F1642 to protect building occupants from all forms of external force.
Kawneer Co. Inc. Kawneer Blast Portfolio
This Month’s Features

Top Metal Builders 2026 – A year of growth
This year, our list of top metal builders shows a steady industry, with the largest contractors and erectors reporting just a slight drop in...

Top Metal Builders 2026 – Top Metal Building Contractors by Tonnage
No. Company, Location 2025 Ton. 2024 Ton. % Change 2025 SF Affiliated Manufacturer(s) Avg. Project Size 1 Span Construction & Engineering, Inc./Madera, Calif. 39745...

Top Metal Builders 2026 – Top Metal Building Contractors by Square Footage
No. Company, Location 2025 SF 2024 SF % Change 2025 Ton. Affiliated Manufacturer(s) Avg. Project Size 1 Span Construction & Engineering, Inc./Madera, Calif. 6670507...

Top Metal Builders 2026 – Top Metal Building Erectors by Tonnage
No. Company, Location 2025 Ton. 2024 Ton. % Change 2025 SF Affiliated Manufacturer(s) Avg. Project Size 1 Steelworx/Groveland, Fla. 19700 16992 15% 3369570 100000...


