Table of Contents
Container Types Explained
Three standard dry container sizes dominate international freight: 20-foot General Purpose (20GP), 40-foot General Purpose (40GP), and 40-foot High Cube (40HC). Each serves different needs based on cargo volume, weight, and type.
The 20GP is the original standard, ideal for dense, heavy cargo. The 40GP doubles the length for voluminous but lighter goods. The 40HC adds 30cm of height, offering 12% more cubic capacity -- the preferred choice for most importers today.
Dimensions & Capacity Comparison
| Specification | 20GP | 40GP | 40HC |
|---|---|---|---|
| External length | 6.06m (19'10") | 12.19m (40') | 12.19m (40') |
| External width | 2.44m (8') | 2.44m (8') | 2.44m (8') |
| External height | 2.59m (8'6") | 2.59m (8'6") | 2.89m (9'6") |
| Internal length | 5.90m | 12.03m | 12.03m |
| Internal width | 2.35m | 2.35m | 2.35m |
| Internal height | 2.39m | 2.39m | 2.69m |
| Door opening height | 2.28m | 2.28m | 2.58m |
| Cubic capacity | 33.2 CBM | 67.7 CBM | 76.3 CBM |
| Max payload | 28,200 kg | 26,580 kg | 26,280 kg |
| Tare weight | 2,300 kg | 3,740 kg | 3,940 kg |
How to Choose the Right Size
The decision depends on four key factors:
1. Cargo Volume
Calculate your total cargo in CBM (length x width x height in meters for each carton, then sum). If under 28 CBM, a 20GP is sufficient. Between 28-55 CBM, consider a 40GP. Over 55 CBM, go 40HC.
2. Cargo Weight
Dense cargo (metals, tiles, machinery) hits weight limits before volume limits. For cargo exceeding 18 tons, use 20GP -- the 40GP/40HC payload limits make them less suitable for ultra-heavy goods.
3. Cargo Height
If your tallest item exceeds 2.28m (door opening height of standard containers), you need a 40HC with its 2.58m door. This is common for furniture, large machinery, and pre-assembled industrial equipment.
4. Cost Efficiency
Cost per CBM is the key metric. A 40HC typically costs 20-30% more than a 20GP but offers 40% more volume, making it the most cost-efficient per unit of cargo space.
Loading Tips & Tricks
| Tip | Benefit | Impact |
|---|---|---|
| Stack vertically to ceiling | Maximizes cube utilization | +15-20% volume |
| Use pallets of uniform size | Eliminates gaps between stacks | +10-15% volume |
| Load heaviest items at bottom | Stability and weight distribution | Prevents damage |
| Fill voids with air bags | Prevents cargo shifting in transit | Reduces damage claims |
| Create a loading plan first | Optimizes space before physical loading | +5-10% efficiency |
| Use 40HC for light bulky cargo | Extra 30cm height is game-changing | +12% capacity vs 40GP |
Cost Comparison
| Route (China to Russia) | 20GP | 40GP | 40HC | Cost/CBM (40HC) |
|---|---|---|---|---|
| Shanghai to St. Petersburg (sea) | $2,800-3,500 | $4,200-5,200 | $4,800-5,800 | $63-76/CBM |
| Xi'an to Moscow (rail) | $4,500-5,500 | $6,500-7,500 | $7,000-8,200 | $92-107/CBM |
| Shanghai to Dubai (sea) | $1,500-2,200 | $2,500-3,200 | $2,800-3,500 | $37-46/CBM |
| Shenzhen to Almaty (rail) | $3,500-4,500 | $5,000-6,000 | $5,500-6,500 | $72-85/CBM |
The 40HC consistently delivers the lowest cost per CBM across all routes, making it the default recommendation for most shipments. Choose 20GP only when your cargo volume is under 28 CBM or your cargo is extremely heavy.
Q: What is the most popular container size?
A: The 40HC (High Cube) is the most popular globally, offering the best cost-per-CBM ratio. It carries 12% more volume than a 40GP for only 20-30% more cost.
Q: How many CBM can a 40HC hold?
A: Rated capacity is 76.3 CBM, but practical usable volume is 65-68 CBM depending on cargo shape and packing method.
Q: When should I use a 20GP instead of a 40HC?
A: Use 20GP when your cargo is under 28 CBM, or when your cargo is very heavy (over 18 tons) where the 20GP's higher payload limit is needed.
Q: Can I ship oversized cargo in standard containers?
A: Items up to 2.58m tall fit in 40HC. For taller cargo, consider Open Top (OT) or Flat Rack (FR) containers, or break-bulk shipping.
Q: What services does ChenXin Cargo offer?
A: Full-service freight forwarding including sea, air, rail, and truck shipping from China to Russia, Central Asia, and UAE.
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