Build a foundation of strength with the Armstrong Main Tee 3600. This 15/16″ galvanized steel suspension system is designed to provide maximum structural integrity in commercial environments, particularly in spaces where overhead clearance is limited. The Peakform profile is specifically designed to increase strength and stability, preventing twisting and improving performance during the installation process. For added durability, each beam is rotary-stitched during manufacture using a patented method that provides exceptional torsional strength.