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Hollow Structural Section (HSS): Why Modern Construction and Infrastructure Projects Are Choosing Hollow Steel Sections

With the increasing worldwide need for more durable, lightweight, and sustainable construction materials, Hollow Structural Section (HSS) products have emerged as one of the most commonly specified types of structural steel in commercial buildings, industrial plants, bridges, warehouses, and civil works. Engineers appreciate HSS for its great strength-to-weight ratio, clean lines, and predictable structural behavior.

In this article, we respond to a few of the most asked what is HSS questions related to hollow structural sections and look into applications, materials, and benefits in modern steel building.

RHS tube rectangular steel tubing (1) (1) (1)
Square steel tube hollow section pipe (1)_1 (1)

What Is a Hollow Structural Section?

HSS is available in these three shape:

Square Hollow Section (SHS)
Rectangular Hollow Section (RHS)
Circular Hollow Section (CHS)

HSS goods are usually produced using Electric Resistance Welding (ERW) or seamless methods and meet global standards including ASTM A500, ASTM A1085, EN 10210 , EN 10219, and JIS G3466.

In contrast to the traditional open steel sections, hollow structural sections offer high torsional resistance, evenly-strength distribution and more efficient structures, which result in the mobilization of less steel material in the overall sense.

What Is the Difference Between HSS and SHS?

The buyers sound HSS and SHS up but they are not the right words to be confused or exchanged.

HSS (Hollow Structural Section) is a generic term that refers to (square, rectangular and circular) hollow steel sections.

SHS (Square Hollow Section) is a individual type of HSS which has equal width and height.

In short, all SHS are HSS but not all HSS is SHS.

If you need symmetrical loading, clean lines of architecture, or balanced performance in the structure, SHS will be your best bet.

For longer spans or directional loading loadings, Rectangular Hollow Section (RHS) might be more structurally efficient.

What Is a Hollow Structural Section Material?

The majority of hollow structural sections are made from high-strength carbon steel or low alloy structural steel. Common grades of materials are as follows:
ASTM A500 Grade B
ASTM A500 Grade C
ASTM A1085
S235JR
S275JR
S355JR
Q235B
Q355B

These materials provide close to the best of all worlds:
Yield strength
Weldability
Formability
Protection from an environment that causes steel to rust and corrode.
Long service life
 
HSS products are available with the following finishes, depending on application:
Raw/black steel finish
Hot-dip galvanized coating
Zinc coating
Anti-rust oil treatment
Powder coating
Special protective coatings

What Are Hollow Sections Used For?

The versatility of hollow structural sections allows for use in many industries.

Typical applications include:

Steel structure buildings
Industrial workshop
Logistics warehouses
Commercial building
Airport terminal
Stadium
Solar mounting systems
Transmission tower
Bridge construction
Oil and gas facilities
Mechanical Equipment Frames
Agricultural Buildings
Infrastructure Engineering

Architects like HSS, too – its smooth, consistent appearance means there are fewer exposed welds and that clean, modern architectural finishes are more easily achieved.

Because hollow steel sections have high strength, good load-bearing capacity, and good design plasticity, more and more hollow steel sections are applied in prefab steel building, modular construction and green building application around the world.

Are Hollow Sections Good for Columns?

Yes. Hollow structural sections are considered to be one of the best options for structural columns.

HSS columns, unlike traditional I-beams or channels, are able to distribute loads uniformly around the full cross-section. This leads to:

Increased compression capacity
Improved buckling behavior
Increasing the torsional stiffness
More sleek architectural look
Reducing the need for maintenance

Square and circular hollow sections are particularly effective for:

Multi-story buildings
High-rise structures
Steel warehouses
Industrial plants
Public infrastructure

Engineers frequently specify HSS columns where both structural performance and aesthetics are important.

Costa Rica Industrial Steel Structure Project Royal Steel Group (4)

Advantages of Hollow Structural Sections

The growing global HSS demand is attributed to a few key benefits:

High strength to weight ratio
Good structural stability
Exceptional torsional resistance
Simple fabrication and welding
Faster construction
Less steel used
Less money for transport
Improved seismie performance
Attractive with right architectural design
It can be easily used with galvanized and painted finishes

These advantages allow contractors to increase the efficiency of building projects and reduce total costs.

Royal Steel Group: the Right Hollow Structural Section Supplier

Royal Steel Group is a recommended source for Hollow Structural Sections (HSS), supporting building, infrastructure, energy and industrial applications globally.

Key Advantages

Complete range of SHS, RHS and CHS under ASTM, EN, JIS and GB specifications.
In stock in ASTM A500 Grade B/C, ASTM A1085, S235, S355, Q235B, and Q355B.

Customized cutting, drilling, welding and galvanizing service.

Strict quality control involved with complete material inspection prior to shipment.

Good production capacity, fast delivery, and dependable service on worldwide export.

Specialized technical support to identify the appropriate HSS solutions for your projects.

Royal Steel Group makes it easy for contractors and distributors to obtain structural steel products to meet the demands of today’s construction projects thanks to its unwavering commitment to quality, competitive prices, and reliable service.

ROYAL GROUP

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Kangsheng development industry zone,
Wuqing district, Tianjin city, China.

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admin@royalsteelgroup.com

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Cherry Yang - CEO : +8613652091506
Wendy Wu -Business Director : +8615222747108

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Post time: Jun-30-2026
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