Cold storage is one of the most expensive and challenging links in the logistics chain. Every cubic foot of space is extremely valuable, and the low-temperature environment places stringent demands on equipment's material performance and structural stability. This case study details how we successfully implemented a high-density, high-stability, and cost-effective storage solution for a client's cold storage facility through an innovative modular linking design, creating an efficient portable stack system.
The Challenge: Safely Stacking Goods in a Limited Cold Storage Space
Our client, a U.S.-based food distribution company, needed to store a large volume of palletized goods in their cold storage facility and wanted to maximize space utilization. Their core challenges were:
- Special Environment: The racks would be used long-term inside a low-temperature cold storage unit but would not be frequently moved between cold and warm environments.
- Space Constraints: The warehouse height was approximately 13 feet (around 4 meters), and the client needed to stack goods two tiers high, achieving a total storage capacity of three pallet levels (one on the floor + two on racks).
- Unit Load: Goods were placed on 47×47 inch (1200x1200mm) pallets, with a total height of 67 inches (1700mm) and a weight of 1100 lbs (500kg).
Our Engineered Solution: The Linking Inverted Stacking Rack System
While a traditional independent rack solution was feasible, it was not optimal in terms of cost and stability. Our engineering team designed an innovative system composed of "Inverted Stacking Racks" and a "Center Linking Pallet" to form a cohesive and sturdy portable stack structure.
1. Core Component: The Inverted Stacking Rack (Rerack)
We first designed an independent inverted stacking rack with internal dimensions of 51x49x71 inches (1300×1250×1800mm), providing a secure storage space for the client's palletized unit loads. The advantage of an inverted rack is its simple and efficient structure; it acts like a cover, placed directly over the lower-level goods, using the upper-level pallet as its support surface.
2. The Key Innovation: The Center Linking Pallet
To achieve a three-pallet-wide storage bay while further enhancing stability and reducing costs, we introduced the "Center Linking Pallet" as a key design feature.
Mechanism: As shown in the diagram, two independent inverted stacking racks can be connected by a center linking pallet. The linking pallet is designed with special hooks that securely fasten onto the frames of the racks on either side.
Value Proposition:
- Cost-Effectiveness: The client achieved the three-pallet storage capacity of a traditional three-rack system with the cost of just "two racks + one linking pallet."
- Enhanced Stability: Connecting individual racks into a single, integrated unit creates a stable row of racking, significantly increasing its resistance to impact during forklift operations and improving overall safety. This transforms individual units into a robust portable stack system.
3. Professional Surface Treatment Recommendation
Considering the racks would be used exclusively inside the cold storage, without experiencing drastic temperature changes or rain, we advised the client:
To Use Electrostatic Powder Coating: In this stable, low-temperature, dry environment, the more cost-effective powder coating provides sufficient corrosion protection. This avoids the need for the more expensive hot-dip galvanizing process, saving the client's budget. This demonstrates our expertise in providing the most suitable solution based on the actual application scenario.
Conclusion: Intelligent Design Creates Superior Value
By introducing the modular "Center Linking Pallet" design, we not only solved the client's high-density storage needs in their cold storage but also delivered superior value in cost control and structural stability that surpassed conventional solutions. This case proves that a deep understanding of the client's use case is the source of innovation, and intelligent engineering design can create tangible economic benefits for the customer.
Is your warehouse facing space or cost challenges? Contact our engineering team to explore a custom-designed, innovative solution for you.
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