What is Square Tubing (HSS)?
Square tubing, technically known as Hollow Structural Sections (HSS), is a cold-formed, welded steel tube used primarily for structural support. Unlike standard pipe which is measured by its ability to carry fluids (Inside Diameter), square tubing is measured by its Outside Dimensions and wall thickness.
Because of its uniform geometry, square tubing offers a high strength-to-weight ratio and uniform compression strength, making it ideal for columns, frames, and beams where aesthetics and structural integrity are both required.
Standard Specifications
The most common standard for structural square tubing in North America is ASTM A500. It covers cold-formed welded carbon steel tubing in rounds, squares, and rectangles.
| Spec / Grade | Details |
|---|---|
| ASTM A500 Grade B | The industry standard. Min Yield: 46,000 psi. Min Tensile: 58,000 psi. |
| ASTM A500 Grade C | High strength. Min Yield: 50,000 psi. Min Tensile: 62,000 psi. |
| Size Range | Small: 0.500" x 0.500" Large: Up to 22.00" x 22.00" |
| Standard Lengths | 20 ft, 24 ft, 40 ft, 48 ft, and 60 ft. |
Common Applications
Square HSS is versatile and easy to weld, cut, and form. It is widely used in:
- Building Construction: Structural columns and trusses.
- Manufacturing: Machine bases, racks, and conveyor systems.
- Agriculture: Barns, fencing, and equipment frames.
- Trailer Manufacturing: High-strength trailer tongues and frames.
Calculating Weight?
Calculating the weight of square tubing is different than round pipe. Use our specialized calculator to get exact weights per foot.
Weight Calculator