Sourcing Hollow Structural Sections (HSS)
Square and Rectangular tubing (often called HSS) is the backbone of modern steel construction. Unlike standard pipe, HSS is rolled to specific structural grades like ASTM A500 Grade B & C.
Distributors in this category specialize in storing indoor material (to prevent rust) and often carry "Jumbo" sizes (up to 20" square) that standard service centers do not stock.
Featured HSS Distributors
Chicago Tube & Iron
Midwest / National
The industry leader in structural tubing. Massive inventory of square and rectangular HSS across multiple Midwest locations. Advanced laser cutting services available.
Totten Tubes
West Coast (CA, WA, AZ)
Specialized HSS distributor serving the Pacific West. They stock difficult sizes, including 20" squares and heavy wall thicknesses not found elsewhere.
Infra-Metals
East Coast
One of the largest structural steel service centers on the East Coast. Ideal for buying HSS bundles mixed with Wide Flange beams and channel.
Marmon/Keystone
National
The tubular experts. While known for mechanical tubing, they maintain a massive inventory of square and rectangular structural tubing across the USA.
Technical Data
Need to calculate the weight of HSS or check wall thickness tolerances? View the Square Tubing Spec Guide.