Square Hollow Sections (SHS) steel are a popular choice in construction and engineering for their strength, clean lines, and versatility. But what exactly is SHS steel, and why is it so commonly used in the modern building industry? In this article, we’ll explore everything you need to know about SHS steel, its properties, applications, and benefits.

Understanding SHS Steel

SHS steel, or Square Hollow Section steel, refers to a type of steel tube with a square cross-section. It is made by cold-forming steel into a square shape, and it can be either welded or seamless. SHS steel is known for its symmetrical profile, smooth surface finish, and high structural strength.

Unlike other steel profiles like RHS (Rectangular Hollow Section) or CHS (Circular Hollow Section), SHS steel offers a balance of strength and aesthetics, making it a favorite for architects and engineers alike.

Common Dimensions of SHS Steel

SHS steel comes in a wide range of sizes, usually defined by:

• Outside width (e.g., 25mm to 400mm)
• Wall thickness (e.g., 1.5mm to 16mm)
• Length (commonly 6 meters, but custom lengths are available)

The dimensions and thickness of square hollow section steel can be customized depending on the application, which adds to its popularity in both residential and commercial projects.

How is SHS Steel Manufactured?

The production process behind Square Hollow Section Steel is both precise and carefully controlled to ensure structural reliability, dimensional accuracy, and surface quality. Whether used in residential fencing or large industrial frameworks, every piece goes through a series of standardized steps designed to meet strict performance requirements.

1. Raw Steel Preparation: Hot rolled coil steel is used as the starting material.
2. Cold Forming: The coil is shaped into a square form through roll forming processes.
3. Welding (for ERW SHS): Edges are joined using Electric Resistance Welding.
4. Sizing and Straightening: The tube is sized to precise dimensions.
5. Surface Finishing: SHS steel can be hot-dip galvanized, powder-coated, or left as raw steel depending on the desired finish.
6. Cutting and Packaging: Final products are cut to length and bundled for delivery.
   

SHS Steel in Construction

SHS steel is a critical component in the modern construction industry. It is widely used in:

• Structural Framing: Ideal for beams, columns, and load-bearing frameworks.
• Fencing and Gates: Strong yet visually appealing.
• Residential Projects: Used in carports, pergolas, and balconies.
• Industrial and Commercial Buildings: Provides support in warehouses, showrooms, and factories.

Its uniform shape and clean lines give architects the ability to design modern and sleek structures without compromising on durability.

Why Choose SHS Steel?

Square hollow sections are widely used in the construction and manufacturing industries for good reason. Their unique shape and structural advantages make them suitable for a variety of applications — from residential fencing and pergolas to large-scale commercial structures.

1. Superior Strength-to-Weight Ratio

One of the most important characteristics of this material is its ability to bear heavy loads without unnecessary bulk. Its symmetrical square design evenly distributes weight and stress, making it ideal for structural applications where stability is a must. Whether used in vertical columns or horizontal beams, it performs reliably under pressure without adding excessive weight to the overall framework.

2. Cost-Effective

From a cost-efficiency perspective, this product offers significant advantages. Its design minimizes waste during fabrication, and its consistent dimensions help reduce installation time. Builders and fabricators appreciate the simplicity it brings to planning and assembly. These benefits contribute to lower overall project costs, especially in large builds where time and budget control are essential.

3. Easy to Work With

Contractors and welders often prefer this material because it’s straightforward to work with. Its flat surfaces allow for accurate and clean cuts, and welding is easier compared to more complex profiles. Pre-cutting, drilling, and surface treatments can be done quickly, making it a go-to option when speed and precision are priorities.

4. Aesthetic Look

In addition to strength and function, square hollow sections also offer visual appeal. Their clean lines and smooth angles complement modern architectural designs, both in exposed structural frames and visible exterior features like railings or balustrades. Whether used in commercial façades or home renovations, this material contributes to a sleek and professional finish.

5. Low Maintenance

When properly treated or coated, these sections are highly resistant to corrosion and environmental wear. Galvanised options, in particular, are favored for outdoor or coastal installations where exposure to moisture and salt is common. With minimal maintenance, the material maintains its integrity and appearance over time, making it a smart choice for long-term investments.

Types of SHS Steel Finishes

Depending on the application, SHS steel can be supplied in different finishes:

• Black Steel (Mill Finish): For internal or non-exposed applications.
• Pre-Galvanised: A zinc coating protects against corrosion.
• Hot-Dip Galvanised SHS: Offers maximum protection in outdoor or coastal environments.
• Powder-Coated SHS Steel: Adds color and additional corrosion resistance.

Each finish has its specific advantages, and the right choice depends on where and how the this steel will be used.

SHS Steel vs RHS and CHS

While SHS steel is square in shape, it’s important to distinguish it from:

• RHS (Rectangular Hollow Section): More suitable for flat joining or when a longer span is needed.
• CHS (Circular Hollow Section): Typically used in architectural elements or piping.

The square profile of SHS steel makes it ideal when equal load distribution is required in both horizontal and vertical planes.

Compliance with Australian Standards

In Australia, SHS steel must comply with AS/NZS 1163 standards. This ensures that the steel used is suitable for structural and mechanical applications, with tight tolerances and excellent performance.

Always check that your supplier provides mill certificates and complies with local regulations to ensure safety and durability.

Where to Buy SHS Steel?

When purchasing SHS steel, it’s essential to choose a reputable supplier that:

• Provides a wide range of sizes and finishes
• Offers custom cutting and fabrication
• Complies with AS/NZS 1163 standards
• Delivers promptly across your region

Look for steel providers that understand your project’s specific needs and offer technical support if needed.

Tips for Choosing the Right SHS Steel

Choosing the right SHS steel involves more than just picking the right size. Here are a few tips:

• Know the Load Requirements: Heavier loads need thicker walls.
• Environment Matters: Use galvanized square section steel for outdoor or coastal applications.
• Consider Welding Needs: Some finishes may require extra surface preparation.
• Think Long-Term: Low-maintenance finishes may save money over time.

Final Thoughts: Is SHS Steel Right for Your Project?

SHS steel is a strong, versatile, and visually pleasing option for a wide range of building applications. Whether you’re constructing a structural frame, fencing, or decorative element, it offers a reliable and long-lasting solution.

Thanks to its square profile, uniform strength, and compatibility with various finishes, SHS steel continues to be a top choice for engineers, architects, and builders across Australia and around the world.

Looking for high-quality SHS steel in Perth, WA?

We are Lintel Steel, your trusted provider of structural steel and steel beams in Western Australia, delivering quality solutions for all your construction needs. We supply a full range of SHS steel sizes and finishes, all compliant with Australian standards. Besides our pre-manufactured steel products, we offer customized solutions tailored to your drawings or specific requirements, ensuring a perfect fit for your construction needs.
Contact us today for a free quote! 

You can find us at our Fanpage Lintel Steel.