The load capacity of a heavy-duty corrugated box depends on the number of corrugated layers and the material grade. Here is a quick reference before you order.
1. Load Capacity by Box Type
| Box Type | Structure | Load Capacity |
|---|---|---|
| Double-wall heavy-duty box | 5-ply | 50-150 kg |
| Triple-wall heavy-duty box | 7-ply | 150-300 kg |
| Reinforced kraft heavy-duty box | Reinforced material | 300-500 kg |
2. Four Factors That Affect Real-World Strength
1. Box size – the larger the box, the lower the relative load capacity.
2. Load distribution – evenly distributed cargo carries more weight; point loads crush faster.
3. Stacking method – correct stacking improves overall compression strength.
4. Paper corner boards – adding corner boards increases load capacity by 30-50%.
Tell us your cargo weight and dimensions, and GuardP (ISO 9001 certified, Guangzhou, China) will recommend the right ply and reinforcement – request a quote within 24 hours.