How Do You Measure A Square Tube?
How Do You Measure A Square Tube? The Steel Tube Institute of North America specifies the measurement of square tubing by its outside width. For example, a tube with 2-inch wide sides calls out as 2 by 2 inches. Sizes range from 1-1/4 by 1-1/4 inch to 32 by 32 inch. What are the sizes