Understanding Rack Load Capacity
Rack load capacity is not a single number — it is a system of interconnected limits that must all be respected. The three key capacity metrics are: arm load (weight per individual arm), bay load (total weight in one bay), and system load (total weight across all bays on connected uprights). Exceeding any one of these limits compromises the entire system safety.
Arm Load Capacity
Arm load is the maximum weight a single arm can support. It depends on arm length, arm cross-section, material grade, and mounting method. Longer arms have lower capacity due to increased bending moment. Our standard models range from 500 kg (light-duty, 2m arm) to 5,000 kg (heavy-duty, 0.6m arm).
| Arm Length | TC-1000 | TC-2000 | TC-3000 | TC-5000 |
|---|
| 600mm | 1,000 kg | 2,000 kg | 3,000 kg | 5,000 kg |
| 1,000mm | 800 kg | 1,600 kg | 2,400 kg | 4,000 kg |
| 1,500mm | — | 1,200 kg | 1,800 kg | 3,000 kg |
Bay Load Calculation
Bay load = number of arm levels × load per arm × 2 (if double-sided). Example: A TC-2000 with 4 levels, double-sided = 4 × 2,000 × 2 = 16,000 kg per bay. This must not exceed the upright column structural capacity (typically 20,000-40,000 kg depending on height and steel grade).
Safety Factor
All Tcrack load ratings include a minimum 1.5× safety factor. This means a rack rated at 2,000 kg per arm has been tested and validated to withstand at least 3,000 kg before any permanent deformation occurs. Never rely on the safety factor for regular operations — it exists as a margin for unexpected overloads and dynamic forces.
How to Determine Your Needs
To specify the right rack system, you need to know:
- Heaviest single item or bundle weight
- Typical material dimensions (length × width × height)
- Number of different material types/SKUs to store
- Total inventory weight
- Daily throughput (tons in/out per day)
- Available floor space and ceiling height
- Overhead crane capacity and hook height
Send us these details and our engineers will calculate the optimal configuration within 24 hours.
