In modern logistics warehouses, long-span pallet rack systems are widely used to maximize storage capacity and adapt to diverse pallet sizes. However, when span length increases beyond standard design limits, structural safety risks—especially progressive collapse—become a critical concern.
This case study presents how ACEALLY engineered a customized pallet racking system for a global logistics enterprise, solving key challenges in long-span load safety, aisle compatibility, and warehouse operational efficiency.
Project Overview: Heavy-Duty Pallet Rack Requirement
A global logistics company required a heavy-duty pallet rack system with the following specifications:
- Beam span: 3100mm
- Load capacity: 2 tons per beam level
- Pallet size: 1400mm width standard pallets
- Load configuration: 2 pallets per beam (1 ton each)
- Warehouse aisle width: 2.8–3.0m existing layout
- Structural requirement: multi-level stacking (2–3 layers, 4–6 tons per upright set)
The key challenge was to ensure structural safety under long-span conditions while maintaining existing warehouse layout efficiency.
Key Risks in Heavy-Duty Pallet Racking Systems
Through structural analysis and on-site evaluation, ACEALLY identified three major risks commonly found in Heavy-Duty warehouse rack systems:
1. Beam Deflection and Single-Point Overload
When span length exceeds 2800mm, traditional beams may experience excessive bending under concentrated pallet loads, increasing the risk of deformation and instability.
2. Upright Overloading and Progressive Collapse Risk
Each upright column carries multi-layer accumulated loads. Under forklift impact or uneven loading conditions, failure may propagate across adjacent bays, leading to cascading collapse.
3. Insufficient Load Distribution in Rigid Structures
Traditional rigid beam-to-upright connections do not absorb overload stress effectively, allowing force transmission across the entire rack system during localized failure events.
ACEALLY Engineering Solution
To eliminate progressive collapse risk and improve structural reliability, ACEALLY developed a four-layer engineering safety system:
1. Structural Reinforcement for Load Optimization
Installed mid-span auxiliary uprights (1.2m height)
→ Reduced effective beam span from 3100mm to 1550mm segments
→ Significantly reduced beam bending stress
Upgraded material to Q355B high-strength steel uprights (80×60×2.5mm)
→ Improved load capacity to 5–6 tons per upright set
→ Enhanced long-term structural stability
2. Controlled Failure Safety Design
To prevent full-system collapse, ACEALLY implemented a controlled separation mechanism:
2.5-ton rated shear-pin beam connectors
→ Allow controlled disengagement under overload conditions
→ Prevent force transmission to adjacent rack sections
Modular rack design (6200mm units)
→ Isolated structural zones reduce cascade failure risk
→ Improves warehouse safety segmentation
3. Beam and Frame Strength Enhancement
High-strength closed-section / I-beam structure (Q235B / I20a options)
→ Deflection controlled within ≤ L/250 standard
→ Improved fatigue resistance under long-term loading
Added diagonal bracing every 2 meters
→ Increased lateral stability by up to 40%
→ Reduced buckling risk under dynamic forklift operations
4. Warehouse Safety and Operation Protection System
Load labeling system: Max 2T per 3100mm span
Forklift protection: 1200mm steel anti-impact guards
Aisle optimization: maintained ≥3.2m safe forklift passage
Integrated WMS warning system for overload alerts
Scheduled inspection program (quarterly structural review)
Project Results
After implementation, the system achieved significant improvements in both safety and operational performance:
- Beam deflection controlled within 7.2mm (within FEM safety standard)
- Upright stability improved by 40%
- Passed 2.5x overload structural testing
- Maintained high warehouse space utilization efficiency
- Reduced risk of progressive collapse in multi-level operations
Client Feedback
“ACEALLY’s engineering solution significantly improved our warehouse safety performance. The structural design gives us confidence in long-term operations and future warehouse expansion.”
Key Components Used in This System
| Component | Specification | Advantage |
|---|---|---|
| Heavy Duty Beam | Q235B 120×50×2.0mm closed beam | High stiffness, 2.5T load capacity |
| Upright Frame | Q355B 80×60×2.5mm | 5–6T load capacity, long service life |
| Shear Pin Connector | 2.5T rated safety design | Controlled failure protection |
| Mid-Span Support Upright | 40×40×2.0mm | Reduces effective span load stress |
| Anti-Collision Guard | 1200×8mm steel | Forklift impact protection |
Why Choose ACEALLY Pallet Racking Systems
With over 20 years of manufacturing experience, ACEALLY provides:
- Custom pallet rack structural design
- Heavy-duty warehouse racking systems
- Long-span and high-load engineering solutions
- ISO / FEM / OSHA compliant safety design
- OEM & ODM customization support
Conclusion
Heavy-duty pallet rack systems require more than standard design—they require engineered safety against progressive collapse, load imbalance, and operational impact risks.
ACEALLY’s customized solution combines structural reinforcement, controlled failure design, and operational safety integration to ensure long-term warehouse stability and efficiency.
