Our high-strength rectangular steel tubes (Rectangular Hollow Sections - RHS) are engineered specifically to provide maximum structural integrity for modern steel structure buildings, industrial warehouses, PEB (Pre-Engineered Buildings), and commercial factories. Manufactured using premium-grade steel and advanced high-frequency welding (ERW) or seamless processes, these tubes offer an outstanding strength-to-weight ratio, exceptional durability, and superior resistance to torsional loading.

We provide full customization of dimensions, wall thicknesses, lengths, and surface finishes (including pre-galvanized, hot-dip galvanized, and anti-corrosion painting) to precisely match your architectural blueprints and local building codes.

• Product Type: Rectangular Hollow Section (RHS), Structural Steel Tube
• Standard: ASTM A500 Grade B/C, EN 10219 (S235JRH, S355J2H), GB/T 6728 (Q235B, Q355B), JIS G3466
• Material Grade: Q235B, Q355B, S235, S355, Gr.B, Gr.C
• Outer Diameter (Section Size): 20x30 mm to 400x600 mm (Custom sizes available)
• Wall Thickness: 1.2 mm to 16.0 mm
• Length: 1.0 m to 12.0 m (Standard export lengths: 5.8m, 6.0m, 11.8m, 12.0m for container loading)
• Surface Treatment: Black/Bare, Lightly Oiled, Pre-galvanized (40-200g/m²), Hot-dip Galvanized (200-600g/m²), Anti-rust Primer Painting
• End Processing: Plain ends, square cut, burr removed
• Application: Column and beam frameworks, truss systems, roof purlins, agricultural greenhouses, prefabricated modular housing, industrial platforms

• High Load-Bearing Capacity & Rigidity: Optimized for heavy-duty structural applications, allowing for longer spans and reduced overall steel consumption in industrial buildings.
• Outstanding Corrosion Resistance: Our hot-dip galvanized coating option provides up to 600g/m² of zinc protection, guaranteeing a lifespan of 20+ years in harsh tropical, coastal, or high-humidity environments.
• Engineered for Precise Fitting: Uniform thickness, tight tolerances, and perfectly de-burred square cut ends ensure smooth on-site welding or high-strength bolt connections.
• Flexible Customization (Made-to-Order): We accommodate specialized requests for chemical compositions, mechanical properties, exact cut-to-length requests, and specific bundle packing according to project blueprints.

• Industrial Infrastructure: Primary columns, roof trusses, and mezzanine beams for steel warehouses, commercial factories, and hangars.
• Prefabricated Modular Buildings: Main load-bearing wall frames and base platforms for flat-pack container houses and labor camps.
• Agricultural Frameworks: Heavy-duty structural pillars and long-span framing for commercial modern film/glass greenhouses.

• Seaworthy Packing: Tied firmly with heavy-duty steel strips in hexagonal bundles, wrapped with waterproof PVC woven fabric upon request to prevent salt spray corrosion during ocean transit.
• 20ft GP Container: Best suited for lengths up to 5.8m / 5.9m. Maximum loading capacity is approximately 25-28 metric tons.
• 40ft GP/HQ Container: Best suited for lengths up to 11.8m / 12.0m. Maximizes volume and weight for long structural profiles.