The main differences between standard and heavy-duty corrugated boxes:
| Item | Standard box | Heavy-duty box |
|---|---|---|
| Fluting | Single wall (3 layers) | Double wall (5 layers) / triple wall (7 layers) |
| Edge crush strength | 3,000β10,000 N/m | 10,000β18,000 N/m |
| Burst strength | 800β1,200 kPa | 1,800β3,000 kPa |
| Load capacity | 5β30 kg | 50β500 kg |
| Paper grade | Standard kraft | Imported kraft / high-strength fluting |
| Typical use | Consumer goods, light items | Machinery, appliances, furniture |
| Price | Lower | Higher |
Put simply, a heavy-duty box is a reinforced carton built for heavy goods β the right answer when a standard carton would crush, sag or fail a drop test.
