The Benefits of Using Square Tube in Construction

With the introduction of new materials, the construction industry has undergone a revolutionary change, making construction processes faster, more efficient, and more economical. In recent years, square tube (SHS steel) has become increasingly popular. It is versatile and durable, offering numerous benefits for construction projects of all sizes.

In this article, we will explore the benefits of using square tube in construction and why it is becoming an increasingly popular choice for builders and contractors.

Square Tubing for Construction

Square tube is a hollow steel material with a square cross-section, processed from steel strip through cold bending, welding, or hot rolling. It features high load-bearing capacity, structural stability, and a neat and aesthetically pleasing appearance. It can be used as a load-bearing component or as a decorative material.

 

Square tube is a versatile material suitable for various construction applications, including:

Building framing and support structures;

Fences and safety barriers;

Shelving systems;

Furniture and decorative features;

Agricultural and industrial machinery;

Automotive and transportation equipment.

                                       Square tubes ready for loading in warehouse

Advantages of Using Square Tubing in Construction

1. Strength and Durability

One of the main advantages of square tube in construction is its strength and durability. Square tube is made from high-quality steel (such as Q235, Q355, S275, S355, etc.), a steel renowned for its strength and toughness.

Its square cross-section structure allows for:

Good bending resistance and torsional strength higher than round tube and rectangular tube

Even stress distribution, enabling it to bear more loads;

High stability, suitable for frame structures.

Square tube has good weather resistance; with galvanizing or powder coating, it can maintain a service life of 20–50 years in outdoor environments, suitable for:

Bridge railings;

Industrial plant structures;

Outdoor awnings;

Parking lot frames.

2. Versatility

Another advantage of square tube in construction is its versatility. Square tube can be used for a variety of purposes, from building frames and supporting structures to making furniture and decorative elements.

Square tube can be cut, drilled, welded, punched, and bent according to different project requirements; Adapted to different sizes and structural designs; Suitable for light-duty structures to heavy-duty industrial structures.

3. Economic and Efficient

High material utilization per unit weight (hollow structure yet high strength); convenient transportation (stackable); can replace some solid steel, reducing structural weight; fast on-site processing speed, saving labor costs.

4. Sustainability

Sustainability is becoming increasingly important in the construction industry, and square tube offers numerous sustainability advantages. Made of steel, a highly recyclable material, square tube means it can be recycled at the end of its lifespan, reducing waste and protecting natural resources.

5. Aesthetics

Square tube also brings aesthetic advantages to building projects. Its square shape creates a clean, modern look, making it ideal for contemporary designs.

It can also be painted or coated to match any color or style, allowing builders and contractors to customize the appearance of their projects.

Different Sizes Square Tubing in Construction

1. 1×1 Square Tubing (25×25 mm)

1-inch square tubing, also known as 1×1 square tube or 1-inch square tube, is a popular choice for many projects.

Features: Lightweight and easy to process.

Typical Applications: Furniture framing; light-duty fencing; DIY projects; decorative support structures.

2. 2×2 Square Tube (50×50 mm)

For projects requiring stronger support, 2×2-inch tubing is an excellent choice. It offers greater strength and durability compared to 1-inch tubing.

Features: Significantly increased strength, suitable for structural support.

Typical Applications: Medium-duty framing structures; stair railings; fence railings; scaffolding main frames.

3. 3×3 Square Tube (75×75 mm or 100×100 mm)

For more demanding applications, 3×3 tubing offers maximum strength and stability.

Features: Suitable for heavy-duty structures, high load-bearing capacity.

Typical Applications: Industrial plant columns; heavy-duty steel structures; carport main beams; large billboard support.

Comparison of Commonly Used Square Tube Materials

Material	Yield Strength (MPa)	Tensile Strength (MPa)	Applicable Environment	Application Industry
Q235	235	375–460	Conventional Environment	Buildings, Light Structures
Q355	355	450–630	Medium Strength Conditions	Factory Buildings, Steel Structure Projects
S275	275	430–580	European Standard Buildings	Building Frames
S355	355	490–630	High Strength Requirements	Bridges, Industrial Structures

FAQ

1. Which is stronger, square tube (SHS) or rectangular tube (RHS)?

Generally speaking, rectangular tube (RHS) has stronger bending resistance in a certain direction because its high cross-section results in a higher bending modulus;

Square tube (SHS) is more evenly stressed in multiple directions, making it suitable for structures requiring uniform load-bearing capacity.

2. Can square tubes be used in load-bearing structures?

Yes.

Many factory buildings use high-strength square tube (such as Q355 and S355) for columns, beams, and trusses. However, the specifications and wall thickness must be selected according to design standards.

3. What are the surface treatments for square tube?

Black tubing (untreated), hot-dip galvanizing, electro-galvanizing, powder coating, and baking paint.

Conclusion

In summary, the use of square tube in construction offers numerous advantages, including high strength, durability, versatility, cost-effectiveness, sustainability, and aesthetics. Its versatility and durability make it an ideal material for a wide range of construction projects, from large industrial buildings to small DIY projects.

Read more: SHS steel meaning or What is the difference between square tube and rectangular tube?