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Hollow Structural Sections (HSS)

Looking for the best HSS on the market? You’ve come to the right place. Our high-quality, American-made HSS steel can help you build beautiful, cost-effective structures that are efficient, sustainable and resilient. 

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Why choose HSS?

A higher load capacity than wide-flange sections means more strength with less material.
Our HSS are made with recycled EAF steel and manufactured in some of the cleanest, greenest facilities on Earth.
Fewer HSS result in lighter frame weight, reduced foundation sizes and cost savings.

All the shapes. All the sizes. All the specs.

Our HSS come in a wide range of shapes, sizes and specs, ensuring you have exactly what you need for your next project.


Up to 22" with 1" wall



Up to 28" with 1" wall



Up to 34 x 10” with 1” wall

ASTM A500 & A1085 HSS

ASTM A500 and A1085 HSS are cold-formed, welded carbon steel structural tubing products that offer excellent compression and torsional resistance.

ASTM A500, Grade C is the standard specification used in North America and is readily available from North American HSS producers as well as steel service centers.

ASTM A1085 HSS are higher performing and well suited for applications that demand more, such as seismic or bridge applications.

Applications include:

  • Buildings
  • Manufacturing and industrial facilities
  • Bridges
  • Towers and cranes
  • Sign supports and poles
  • Off-shore production and drilling platforms
  • Roll-over protective structures (ROPS)
  • Falling object protective structures (FOPS)
  • Amusement rides
  • Manufacturing facilities

ASTM A500 Resources:

ASTM A1085 Resources:

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CSA G40.21 HSS

CSA G40.21 HSS are cold-formed, welded carbon steel structural tubing products produced to the Canadian steel standard. We offer Class C and Class H in accordance with this specification.

Class C HSS are cold-formed and welded similar to ASTM A500 HSS.

Class H HSS are also cold-formed and welded, but then heat-treated in a furnace to stress relieve the product. Class H can be designed to a higher axial capacity in accordance with CSA S16, which may lead to weight savings in column applications.


CSA G40 Imperial Section Properties

CSA G40 Metric Section Properties

Class H Fact Sheet

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The largest HSS in North American can help you build bigger, wider and taller than ever before. See how Jumbo HSS are changing the structural steel game.

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Steel HSS support sustainability goals.

Not only is steel the strongest building material on Earth, it’s also the greenest. Atlas Tube structural steel includes steel made in electric arc furnaces that emit 75% less CO2 than traditional steelmaking. Each new HSS can contain up to 70% recycled content and is 100% recyclable.

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Now you can field bolt HSS with Shuriken®.

Meet Shuriken — the Better Bolted Connection that’s about to change your building game. Shuriken is a simple yet revolutionary way to field bolt HSS, eliminating the amount of field welds needed, increasing in-shop prefabrication, and saving you time, hassle and money. Go ahead — field bolt HSS like never before!

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Axial load calculator

It takes fewer HSS to do more.

Excellent strength-to-weight ratios mean you’ll need less steel to do the job, making it a cost-comparative option to wide-flange sections. Use our Axial Load Calculator to see what your project needs.


Work with our expert

Learn how to incorporate the benefits of HSS into your next project! Work with our expert, Brad Fletcher.

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