This is an A653 Galvanized Steel Gauge 16, 1-1/4" x 1-1/4’’x 20' Square tubing.
This is an ERW tubing (Electric Resistance Welded) easily welded, rolled or punched, Steel and Pipes stocks ASTM A653.
Galvanized steel Tubing is compliant with ASTM A653 specifications. ASTM A653 Steel is a standard specification for Hot-Dip Process Galvanized steel structural tubing in square and rectangular shapes. It is suitable for welding and for forming operations involving coiling, bending, and flanging, subject to certain qualifications. Suitable for structural supports, building columns, highway signs, oil field services, communication towers and much more. They offer versatility, simply cut to a custom measurement for your specific project needs with a metal saw.