Heavy/Medium Duty
Precision Factory Lineup
High-Performance Medium & Heavy Duty Industrial Storage Series
Explore our core engineering catalog engineered for distribution centers, third-party logistics (3PL) hubs, retail stockrooms, and automated production facilities. Manufactured from premium structural cold-rolled steel with electrostatic scratch-resistant coating.
Logistics Components
Specialized Racking
Dynamic Gravity Flow
Custom Selective
Stackable Post Racks
Tire & Specialized
Light/Medium Shelving
Engineering Whitepaper
Structural Mechanics, Profile Geometries & Load Rating Architectures
Medium duty racking constitutes the crucial operational layer bridging light-duty commercial shelving and heavy-duty structural selective pallet systems. Operating predominantly within the 200 kg to 800 kg per level (440 to 1,760 lbs/shelf) threshold, these systems demand rigorous cold-roll forming, finite element analysis (FEA), and strict deflection compliance.
The Metallurgy of High-Strength Medium-Duty Storage: Q235B vs. SPCC
Industrial racking systems installed across North America, Europe, and Australasia rely fundamentally on the yield strength and ductile integrity of cold-rolled carbon steel. At our automated manufacturing center, our upright frames and horizontal step beams are fabricated from certified Grade Q235B structural carbon steel (equivalent to ASTM A36), featuring a minimum yield strength ($\sigma_y$) of 235 MPa and ultimate tensile strength ($\sigma_u$) exceeding 370–500 MPa.
For high-precision punched components, including butterfly connector holes, teardrop slots, and diamond upright perforations, we deploy cold-rolled SPCC steel sheets that undergo automated uncoiling, multi-station continuous roll-forming, and computerized high-speed punching. This guarantees a punch-pitch tolerance within $\pm0.1\text{ mm}$, preventing post-assembly beam sagging or lateral skewing under full Uniform Distributed Load (UDL) conditions.
- Deflection Integrity Standard: Engineered strictly to $L/200$ deflection thresholds under full rated capacity, with critical automated picking zones tightened to $L/250$ to avoid roller interference.
- Multi-Stage Pre-Treatment: Full 10-step surface preparation including degreasing, acid pickling, zinc phosphating, and electrostatic epoxy-polyester powder baking (60–90 $\mu\text{m}$ film thickness).
- Positive-Interlock Beam Connectors: Proprietary 3-claw or 4-claw cold-stamped connector hooks equipped with spring-steel safety pins preventing accidental dislodgement from lift-truck forks or heavy manual picking impact.
Custom OEM Engineering Tolerances
Our engineering division designs directly around your specific logistics parameters, providing imperial (lbs/in) and metric (kg/mm) CAD layouts ready for local Engineer of Record (EOR) stamping.
50 mm / 75 mm
Vertical Pitch Step
200–800 kg
UDL Capacity/Shelf
1.5 – 2.0 mm
Upright Profile Gauge
ASTM B117
500+ Hr Salt Spray Pass
| Racking Category | Standard Steel Grade | Typical Beam Profile | Load Rating (UDL) | Deck Infill Options | Optimal Logistics Application |
|---|---|---|---|---|---|
| Medium Duty Type A | Q235B Cold-Rolled | P-Type Step Beam (50×30 mm) | 200 – 350 kg/tier | Solid Cold-Rolled Steel Shelf, Particle Board | Manual e-commerce order picking, automotive component storage |
| Medium Duty Type B (Longspan) | Q235B High Tensile | Closed Step Box Beam (60×40 mm) | 350 – 800 kg/tier | Galvanized Steel Panels, Heavy Wire Mesh Deck | Industrial tooling, distribution bin storage, multi-tier catwalks |
| Rack-Supported Mezzanine | Q235B / Q345B Heavy | C-Channel & Tubular Upright | 300 – 1000 kg/m² Floor | Steel Perforated Grating, B-Decking + Plywood | Vertical ceiling expansion, apparel distribution, sorting hubs |
| Selective Light Pallet Hybrid | Cold-Formed Strip Steel | Twin Box Interlocking Beam | 800 – 1500 kg/level | Welded Drop-in Wire Decks, Cross Pallet Supports | Hand-stacked cartons combined with bottom GMA pallet staging |
Institutional Credibility
Why Tier-1 Global Distributors Partner with HEDA Shelves
Since 2001, Guangzhou Heda Shelves Co., Ltd. has delivered end-to-end manufacturing solutions for warehouse operators, 3PL logistics facilities, automotive suppliers, and system integrators worldwide.
25+ Years of Certified Manufacturing
Founded in 2001, our 300+ technical engineers, certified robotic welders, and quality assurance specialists ensure zero-defect fabrication across every custom OEM contract.
Free 24-Hour CAD & 3D Engineering
Submit your warehouse footprint, clear height, and load specs to receive itemized quotations, full bill-of-materials (BOM), 2D plans, and isometric 3D models in imperial and metric units within 24 hours.
ISO 9001:2015 & CE Marking
Our quality management infrastructure is certified under ISO 9001:2015 (Certificate 18624Q00169R0M) and European Construction Products Directive CE Marking (2435-CPR-8605159), with RoHS material compliance.
30,000 Tons Monthly Capacity
Spanning 323,000 sq ft (30,000 m²), our high-output facility utilizes continuous cold-roll profiling lines, automated punch presses, and multi-gun electrostatic powder coating chambers capable of servicing massive commercial rollouts.
Container-Optimized Export Packing
Every bundle is precision-banded with corrugated edge protectors, industrial shrink wrap, and custom steel stillages. Perfectly cube-optimized for 20GP, 40GP, and 40HQ ocean containers shipped directly to North American, European, and global ports.
Bespoke OEM/ODM Private Label Programs
We empower regional material handling distributors and racking contractors with complete white-label manufacturing: laser-cut client logos, customized punch geometries (teardrop, hex, butterfly), and branded installation manuals.
Strategic Sourcing Intelligence
Emerging Procurement Trends Shaping Industrial Racking Sourcing
Global logistics executives and procurement directors are shifting their sourcing criteria away from baseline steel commodity pricing toward lifetime total cost of ownership (TCO), adaptive flexibility, and compliance traceability.
1. Omnichannel Micro-Fulfillment & Pick Towers
Rapid SKU proliferation in retail and pharmaceutical e-commerce requires warehouses to convert dead overhead vertical space into multi-tiered manual picking modules. Demand for custom medium-duty shelving that integrates seamlessly with mezzanine flooring and catwalk decking is expanding at over 8.4% CAGR.
2. Environmental, Social & Governance (ESG) Compliance
Corporate procurement mandates in North America and the EU now audit powder coating chemistry and scrap recovery ratios. Our closed-loop powder reclamation systems recover 98% of overspray, while non-toxic, zero-VOC polyester formulations meet demanding RoHS and LEED green warehouse standards.
3. Nearshore-Resilient Dual-Source OEM Supply
To hedge against regional supply chain disruptions, international buyers are engaging in contract OEM partnerships with verified manufacturers capable of scaling monthly output from 100 to 1,000+ tons on demand, backed by bonded ocean freight logistics and standardized imperial hardware sizing.
Technology Horizon
Technological Frontiers: Racking in the Era of Warehouse Automation
Medium-duty storage is undergoing an engineering renaissance driven by Autonomous Mobile Robots (AMRs), digital twins, and sensor-augmented inventory management.
Interoperability with Autonomous Mobile Robots (AMR/AGV)
Modern warehouse layouts pair static medium-duty shelving with collaborative picking robots. Our systems incorporate reinforced baseplates, flush-faced bottom clearance channels, and precise aisle run-out tolerances that accommodate robotic navigation sensors, magnetic floor tracks, and automated tote-handling dollies.
Digital Twin Layout Simulation & Sensor Brackets
Every custom OEM project is delivered with 3D BIM/CAD asset files compatible with warehouse management software (WMS) spatial simulations. Furthermore, our beams can be pre-punched with standardized mounting brackets for Pick-to-Light (PTL) LED modules, RFID track antennas, and automatic barcode scanning scanners.
Procurement Advisory
Frequently Asked Questions: Technical Sourcing & Compliance
Authoritative technical guidance compiled by our senior structural engineering team to assist supply chain managers, warehouse operations directors, and commercial import agents.
What are the key engineering distinctions between Medium Duty Type A and Type B racking?
Medium Duty Type A utilizes a butterfly-hole punch design on cold-rolled steel columns, usually configured with P-shaped step beams and drop-in steel panels. It is designed for manual picking applications rated between 150 kg and 350 kg per layer. Assembly is 100% boltless and requires no tools.
Medium Duty Type B (frequently designated as Longspan Shelving) features heavy-gauge trapezoidal or diamond-punched uprights (55×47 mm or 60×50 mm profile) and closed-step box beams with welded 3-claw connectors secured by locking safety pins. It sustains uniform loads ranging from 300 kg to 800 kg per tier over expansive beam spans up to 2,500 mm (98 inches), accommodating wire mesh decks or solid steel decking.
Medium Duty Type B (frequently designated as Longspan Shelving) features heavy-gauge trapezoidal or diamond-punched uprights (55×47 mm or 60×50 mm profile) and closed-step box beams with welded 3-claw connectors secured by locking safety pins. It sustains uniform loads ranging from 300 kg to 800 kg per tier over expansive beam spans up to 2,500 mm (98 inches), accommodating wire mesh decks or solid steel decking.
How does your engineering team calculate structural load capacity and deflection limits?
Load calculations adhere strictly to the Rack Manufacturers Institute (RMI MH16.1) and European Standard EN 15512 / FEM 10.2.02 structural engineering protocols.
Under full rated Uniform Distributed Load (UDL), horizontal beam deflection is restricted to $\delta \le L/200$, where $L$ represents the clear span of the horizontal beam. For automated sorting systems or pick towers with roller conveyor integration, we calibrate profiles to $\delta \le L/250$ to avoid roller bind. Upright frame buckling calculations incorporate Euler’s buckling criteria with factored effective length coefficients ($K \approx 1.0$), ensuring an overall structural safety factor of 1.65 to 1.8 across all installations.
Under full rated Uniform Distributed Load (UDL), horizontal beam deflection is restricted to $\delta \le L/200$, where $L$ represents the clear span of the horizontal beam. For automated sorting systems or pick towers with roller conveyor integration, we calibrate profiles to $\delta \le L/250$ to avoid roller bind. Upright frame buckling calculations incorporate Euler’s buckling criteria with factored effective length coefficients ($K \approx 1.0$), ensuring an overall structural safety factor of 1.65 to 1.8 across all installations.
Do your racking components support local seismic and building permit reviews in the USA and Canada?
Yes. We regularly supply comprehensive engineering packages including material mill certificates (affirming Q235B chemical metallurgy and physical yield properties), component cross-sectional dimension drawings, section modulus ($Z$), moment of inertia ($I$), and load capacity calculation tables. These engineering submittals are prepared specifically to facilitate rapid review, seismic analysis, and final PE (Professional Engineer) stamping by your local Engineer of Record (EOR) across any North American or European municipality.
What surface treatment process is used to prevent oxidation in high-humidity or cold-chain environments?
Components pass through an automated 10-stage pre-treatment wash: alkaline hot degreasing, twin water rinses, acid pickling to eradicate all mill scale, zinc-manganese phosphating (creating a micro-crystalline anti-corrosion barrier), passivation rinse, and clean dry-off oven baking.
Following pre-treatment, parts enter an automated electrostatic booth where thermosetting epoxy-polyester powder is uniformly applied to a depth of 60 to 90 microns and baked at 180°C–200°C. For extreme humidity, coastal salt exposure, or sub-zero refrigeration cold rooms, we provide hot-dip galvanizing (HDG) conforming to ASTM A123 / EN ISO 1461 with zinc coatings exceeding 65–85 $\mu\text{m}$.
Following pre-treatment, parts enter an automated electrostatic booth where thermosetting epoxy-polyester powder is uniformly applied to a depth of 60 to 90 microns and baked at 180°C–200°C. For extreme humidity, coastal salt exposure, or sub-zero refrigeration cold rooms, we provide hot-dip galvanizing (HDG) conforming to ASTM A123 / EN ISO 1461 with zinc coatings exceeding 65–85 $\mu\text{m}$.
How do you pack custom OEM racking orders to maximize container space and avoid freight damage?
Container volume optimization is engineered using specialized 3D packing software. Vertical upright frames are pre-assembled or shipped knocked-down (KD) depending on freight rate arbitrage; beams are nested face-to-face in steel-strapped bundles separated by corrugated timber dunnage; and small hardware (safety pins, expansion anchor bolts, leveling shims, PP pallet feet) are crated in labeled, fumigated wooden crates or heavy export pallets. A standard 40ft High Cube (40HQ) container achieves 50 to 58 cubic meters of high-density loading without exceeding sea transit axle weight limits.