Box profile (commonly known as square and rectangular hollow section) is a versatile structural and manufacturing component engineered to provide high load-bearing capacity and outstanding resistance against bending and torsional stresses. Manufactured from high-grade hot-rolled or cold-rolled steel coils formed and welded on high-precision roll-forming mills.

To help you select the most suitable product for your project requirements, box profile types, material properties, and application areas are detailed below:

Types of Box Profiles by Geometry and Material

• Square Hollow Sections: Equal wall dimensions provide balanced structural resistance in both axes. Widely used for columns, trusses, and machine frames.
• Rectangular Hollow Sections: Different depth-to-width ratios offer superior flexural strength along the major axis, ideal for floor beams, purlins, and chassis rails.
• Galvanized Box Profiles: Protected by a hot-dip zinc coating offering robust barrier protection against rust, moisture, and outdoor weathering.
• Precision Furniture & Industrial Tubes: Formed from cold-rolled (DKP) steel with tight tolerances, clean surfaces, and excellent powder coating adhesion.

Where Is It Used? (Application Areas)

• Structural Steel & Building Construction: Factory frameworks, roof trusses, mezzanine floors, staircases, and primary support columns.
• Solar PV Racking Systems: Ground-mounted and rooftop photovoltaic array mounting structures.
• Automotive & Trailer Manufacturing: Truck bodies, trailer chassis, caravan framing, and agricultural machinery skeletons.
• Warehousing & Storage Systems: Heavy-duty pallet rack columns, cantilever uprights, and automated conveyor frames.
• Architectural Cladding & Railings: Modern curtain wall sub-frames, security fences, guardrails, and decorative gates.

Common Sizes (Examples)

Box profiles are specified as Width x Depth x Wall Thickness (e.g., 40x40x2.0 mm or 50x100x3.0 mm):

• For Light Duty / Furniture & Fitout: 10x10 mm, 20x20 mm, 25x25 mm, 20x30 mm, 20x40 mm (0.80 mm to 1.50 mm wall thickness).
• For General Industrial / Fences & Gates: 40x40 mm, 50x50 mm, 40x60 mm, 40x80 mm (1.50 mm to 2.50 mm wall thickness).
• For Heavy Structural / Construction: 80x80 mm, 100x100 mm, 150x150 mm, 200x200 mm, 100x200 mm, 200x300 mm (3.00 mm to 12.00 mm wall thickness, 6m and 12m standard lengths).

Key Advantages & Technical Features

• High Strength-to-Weight Ratio: Closed geometry achieves maximum structural performance with reduced steel weight.
• Superior Weldability: Low carbon equivalent grades (S235, S275, S355) ensure crack-free welding using standard MIG/MAG processes.
• Ease of Fabrication: Compatible with 3D CNC tube laser cutting, miter sawing, punching, and roll bending.