HEDAHeavy Duty Racking
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EnglishEspañolPrecision-fabricated from Q235B cold-rolled structural steel, our heavy-duty and medium-duty longspan solutions provide certified payload safety, modular tier expansion, and space utilization rates reaching up to 85%.
Longspan shelving bridges the mechanical load divide between manual bin shelving and heavy pallet racking. Understanding its material composition, structural deflection limits, and weld physics is vital for procurement longevity.
In industrial warehousing, structural failure is predominantly caused by material fatigue, micro-fracturing along cold-formed radii, or localized buckling under non-uniform loads. Top Chinese export manufacturers eliminate these risks by utilizing premium Q235B grade high-tensile cold-rolled steel, certified to yield strengths exceeding 235 MPa and ultimate tensile resistance up to 470 MPa. Compared to recycled, commercial-grade re-rolled scrap steel commonly found in cut-price markets, certified Q235B carbon steel contains precisely calibrated manganese and silicon proportions. This metallurgy preserves longitudinal ductility during high-speed roll forming, eliminating micro-cracking across beam claw hooks and perforated upright profiles.
The profile geometry of longspan uprights relies on a computerized 12-to-18 station continuous rolling mill that cold-shapes structural steel coils into multi-faceted Omega (Ω) cross-sections. This multi-ribbed geometry yields an exceptional moment of inertia (Ix and Iy), delivering unmatched resistance against horizontal torsional buckling and seismic shear forces while minimizing overall tare weight.
| Engineering Attribute | Longspan Medium Duty (M-Series) | Longspan Heavy Duty (H-Series) | Industrial Pallet-Supported Tier |
|---|---|---|---|
| Uniformly Distributed Load (UDL) | 200 – 400 kg per beam level | 500 – 1,000 kg per beam level | 1,000 – 4,500 kg per beam pair |
| Upright Frame Section | 55 × 47 × 1.5mm / 1.8mm Ω-profile | 60 × 50 × 2.0mm Ω-profile | 80/90/100 × 70 × 2.0 – 2.5mm |
| Step Beam Profile | 50 × 30 × 1.5mm P-beam / Step | 60 × 40 × 1.5 – 2.0mm Step | 80 – 140 × 50 × 1.5 – 2.0mm Box |
| Pitch Adjustment Step | 50 mm pitch laser-slotted | 50 mm / 75 mm dual-slot pitch | 75 mm / 76.2 mm teardrop or hook |
| Decking Panel Selections | Galvanized steel plates (0.6-0.8mm) | Reinforced steel / 18mm Plywood | Heavy wire mesh decking / Bar grating |
| Design Deflection Limit | 1 / 200 of clear span (FEM 10.2.02) | 1 / 250 of clear span (EN 15512) | 1 / 250 to 1 / 300 (RMI MH16.1) |
A major vulnerability for longspan shelving exported across oceanic shipping lanes and installed within high-humidity equatorial or sub-zero refrigeration zones is corrosion. China's leading manufacturing facilities utilize an automated 9-stage surface pre-treatment system, comprising high-temperature chemical degreasing, twin continuous water rinses, zinc phosphating, and deionized neutralization. This chemical passivation creates a nanoscale crystalline barrier that anchors the subsequent electrostatic deposition of lead-free epoxy-polyester thermosetting powders.
Cured inside continuous convection tunnels at 180°C to 200°C for 20 minutes, the resulting polymer coat reaches a uniform 60 to 80-micron thickness. This finish delivers over 500 hours of continuous salt-spray resistance under ASTM B117 standards, a 2H surface pencil hardness rating against manual crate abrasions, and zero heavy-metal leaching, ensuring full food safety compliance in cold-chain logistics operations.
Global supply chain disruptions, rising urban real estate costs, and automated picking ecosystems are drastically changing the engineering specifications required by international longspan shelving purchasers.
With industrial land premiums escalating globally, standalone floor-standing longspan shelving is giving way to multi-level, rack-supported mezzanine walkways. Buyers are capitalizing on vertical clear heights of up to 10 meters, tripling usable cubic square footage without requiring new warehouse construction.
Volatile international ocean container rates demand maximum volumetric packing density. Advanced manufacturers engineer uprights and stepped beams to nested flat-pack standards, increasing 40HQ container volumetric utilization from 62% to over 94% and lowering per-unit freight overhead.
Import authorities in regions across Latin America, New Zealand, and Southern Europe now enforce mandatory FEA (Finite Element Analysis) stress simulations and expanded heavy footplate anchorage, requiring suppliers to guarantee seismic zone class compliance under active seismic loads.
Longspan shelving is rapidly adapting to modern robotic fulfillment. Racks now feature integrated low-level pick tunnels for Autonomous Mobile Robots (AMRs), along with overhead shelf levels optimized for high-density carton storage and pick-to-light sorting sensors.
Based in Pazhou, Guangzhou—adjacent to the Canton Fair Complex—Guangzhou Heda Shelves Co., Ltd. provides direct manufacturing precision, turnkey engineering designs, and comprehensive export guarantees.
Over two decades of excellence since 2001, executing 5,000+ complex industrial racking installations for commercial giants across 5 continents.
One-stop procurement spanning heavy longspan racks, pallet shuttles, cantilever racking, multi-tier mezzanines, and full retail gondola shelving systems.
Parametric flexibility: exact bay widths, upright column depths, tier load ratings, and custom corporate powder coating formulations matched to RAL standards.
100% full-process QA auditing: raw steel spectral testing, automatic continuous weld inspection, 50-micron powder testing, and destructive batch loading tests.
Global engineering sales desks deliver complete AutoCAD floor plan drawings, 3D visualizations, and itemized proforma quotes within 8 working hours.
Direct answers to the structural calculations, international shipping logistics, and customization options most frequently addressed by our senior export engineers.
Our longspan shelving lines are categorized into Medium Duty (300 to 500 kg per beam level) and Heavy Duty (up to 1,000 kg per level uniformly distributed). For multi-tier mezzanine floor installations, our platforms support deck loads from 500 to 1,200 kg/m², engineered with a minimum safety factor of 1.5 under EN 15512 standards.
All longspan and pallet uprights can be supplied with heavy-gauge steel column protectors, wrap-around base guards, or continuous aisle-end crash barriers. Furthermore, base footplates are enlarged to 100 × 100 × 4mm or 120 × 120 × 6mm, anchored into structural concrete with mechanical or chemical wedge anchor studs.
Galvanized steel panels offer the greatest hygienic longevity and non-combustible fire ratings. Wire mesh decking is required by modern overhead ESFR fire sprinkler codes as it allows water penetration, while 18mm high-density melamine or structural plywood is a cost-effective, high-grip solution for non-hazardous boxed carton picking.
Yes. Our engineering department provides full turnkey engineering services. By supplying your building AutoCAD dimensions, clear ceiling heights, column locations, and target cargo dimensions, we deliver complete 2D layout plans and high-resolution 3D virtual renderings within 8 hours, completely free of charge.
Upright frames and horizontal beams are systematically bundle-strapped with heavy plastic banding, protected with corrugated corner guards, and wrapped in heavy stretch film. Small hardware accessories, connector safety lock pins, and levelling shims are packed in reinforced five-ply export cartons and timber crates to eliminate transit friction.
Standard export orders of 1 to 3 forty-foot high-cube containers (40HQ) are fabricated within 15 to 20 working days. Customized roll-formed profiles or specialized RAL colors take 25 days. Payment terms are commonly managed via T/T or confirmed, irrevocable Letter of Credit (L/C at sight) with full documentation.
Consult directly with our senior racking structural engineers. Send your warehouse floor plan, SKU load requirements, or commercial project blueprints to receive full 2D/3D engineering layouts and factory-direct pricing within 8 hours.
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