Rectangular HSS Tubing: Versatile Structural Solutions for Multi-Axial Load-Bearing Systems
Rectangular Hollow Structural Sections (HSS) deliver unmatched versatility in modern construction, combining high torsional rigidity with sleek aesthetics. Certified to ASTM A500 (Gr. B/C) and ASTM A1085, these cold-formed or electric-resistance welded tubes achieve 20–35% higher bending resistance than I-beams of equivalent weight. With sizes ranging from 1.5″×0.75″ to 16″×8″ and wall thicknesses up to 0.5″, they excel in seismic-resistant frames, cantilevered signage, and modular building systems.
Key Technical Specifications & Compliance
Material Properties by Standard:
| Standard | Yield Strength (MPa) | Tensile Strength (MPa) | Tolerances |
|---|---|---|---|
| ASTM A500 Gr. B | ≥315 | 400–550 | ±1% width, ±10% wall thickness |
| ASTM A1085 | ≥365 | 455–620 | ±0.75% width, ±5% wall |
| EN 10219 S355J2H | ≥355 | 510–680 | ±1.2% width, ±8% wall |
Dimensional Range & Weight:
| Size (inches/mm) | Thickness (inches/mm) | Weight (lbs/ft/kg/m) | Section Modulus (in³/cm³) |
|---|---|---|---|
| 2×1 / 50.8×25.4mm | 0.125″ / 3.18mm | 2.21 / 3.29 | 0.32 / 5.24 |
| 6×4 / 152.4×101.6mm | 0.375″ / 9.53mm | 22.37 / 33.29 | 15.7 / 257.3 |
| 10×8 / 254×203.2mm | 0.500″ / 12.7mm | 55.64 / 82.78 | 47.8 / 783.2 |
Certifications: ISO 9001:2015, CE Marking, AWS D1.1 welding compliance, and LEED v4.1 recyclability credits.
Engineering Advantages Over Competing Profiles
- Multi-Directional Load Capacity: 45° fillet welds distribute stresses evenly, increasing joint efficiency by 18–25%.
- Architectural Flexibility: Flat surfaces simplify cladding attachment (≤0.8mm surface roughness).
- Corrosion Resistance: Optional hot-dip galvanizing (610 g/m²) or powder coating (80μm DFT).
- Cost Efficiency: 12–15% material savings vs. built-up box sections in truss systems.
Critical Applications & Project Case Studies
Rectangular HSS is ideal for these demanding scenarios:
- Commercial: Atrium roof trusses (8″×4″, ASTM A1085, 0.313″ wall).
- Transportation: Bridge guardrail posts (6″×3″, S355J2H, galvanized).
- Energy: Solar tracker frames (3″×2″, ASTM A500 Gr. C).
- Industrial: Conveyor system supports (10″×6″, 0.375″ wall).
Project Highlight: In Seattle’s Climate Pledge Arena, 12″×8″ HSS (Grade K460) achieved 65-meter clear spans while reducing steel tonnage by 22% versus tubular alternatives.
Customization & Quality Assurance
Processing Options:
- Ends: Mitred (45°/90°), coped, or drilled (ANSI/ASME B16.25).
- Coatings: Interior epoxy lining (250μm) for chemical exposure.
- Lengths: Standard 20’–40’; custom-extruded up to 80’ (24.4m).
Testing Protocols:
- Eddy Current Inspection: Detects surface flaws ≥0.5mm deep.
- Hardness Testing: 160–220 HBW (Brinell scale).
- Dimensional Checks: Laser-scanned width/height (±0.15mm).
Why Choose Our Rectangular HSS?
Our tubes provide 1,800–5,500 MPa·mm³ torsional rigidity and 0.92–1.08 rectangularity ratios for precision fabrication. The EN 10219-compliant mill ensures ±0.2mm wall uniformity, while AISC 360-16 certification guarantees North American code compliance.
Download our free HSS load table to compare moment capacities (Mn) and shear values (Vn) across sizes. Request a corrosion protection guide tailored to your environment (C2 inland to C5 offshore).
Packaging: Plastic end caps + steel strapping; 40ft container holds 20–25 tons.
Lead Time: 30–45 days for stock sizes; 60–75 days for custom-coated orders.
Packing And Delivery
