Hollow Section

Hollow sections are widely used materials in modern construction and manufacturing. Hollow sections—also known as Hollow Structural Sections (HSS)—are steel tubes with hollow cross-sections and distinctive structural profiles. They are used in a broad range of applications, including building construction, industrial equipment, and machine manufacturing.

Hollow sections are available in square, round, and rectangular cross-sectional shapes. Their hollow-core design provides flexible connection options for structural framing while maintaining an excellent strength-to-weight ratio.

Types of Hollow Structural Sections

Square Hollow Section (SHS)

A Square Hollow Section is a steel tube with a hollow interior and a square outer cross-section. It is manufactured through advanced processes such as cold drawing or hot rolling, resulting in excellent mechanical performance. Due to its high strength and uniform shape, SHS is widely used in bridge construction as a primary load-bearing element, offering both structural stability and visual appeal.

Circular Hollow Section (CHS)

Circular Hollow Section (CHS) features a cylindrical profile with a smooth surface. It is commonly used for railings and barriers in public spaces and is also suitable for applications involving fluid transport, as its shape minimizes friction loss.

Rectangular Hollow Section (RHS)

Rectangular Hollow Sections offer the benefits of Square Hollow Sections while providing additional flexibility through adjustable aspect ratios. They are commonly used in truss systems, conveyor frames, storage racks, and shelving systems that require customized structural solutions.

Advantages of Hollow Sections

Ease of Construction

The flat surfaces of square and rectangular hollow sections allow direct welding to other metal components, reducing edge preparation time by up to 40%.

Aesthetically Pleasing Structures

The clean geometric shapes align well with modern architectural design. Many designers incorporate exposed SHS and RHS elements into façades and interior structures.

High Adaptability

Protective plating and surface treatments enable hollow sections to withstand extreme temperatures ranging from –40°C to 120°C, making them suitable for coastal and high-salt environments.

Long Life Cycle

Hollow sections can achieve a service life of 50 years or more and offer up to 90% recyclability, supporting sustainable construction and green building certification standards.

Customization Options

Manufacturers can provide customized specifications, with sizes ranging from 10 mm to 600 mm. Additional finishes such as powder coating and hot-dip galvanizing enhance corrosion resistance for outdoor applications.

Efficiency and Cost-Effectiveness

Compared to solid bars, hollow sections can reduce material usage by 20–40% while maintaining equivalent strength. This also lowers transportation costs for large-scale projects by at least 15%.

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