Shop open top shipping containers — ideal for transporting large or oversized cargo. Durable, weatherproof, and easy to load/unload from the top, perfect for custom projects and secure storage
Comprehensive Technical Specifications: Open-Top Shipping Containers (20ft & 40ft)
Open-top containers are specialized shipping units designed for cargo that is either too tall to fit in a standard dry van or too heavy/bulky to be loaded through end doors. Instead of a solid steel roof, these containers feature a removable tarpaulin (tir) system supported by movable roof bows.
1. General Overview and Structural Design
The primary differentiator of an open-top container is its loading flexibility. By removing the top cover, shippers can utilize cranes or "overhead" loading methods.
2. Detailed Dimensions and Capacities
While external dimensions remain consistent with ISO standards to ensure stack ability, internal dimensions vary slightly due to the reinforced frame.
20ft Open-Top Container
Ideal for heavy, dense cargo like scrap metal, coal, or heavy machinery.
|
Attribute |
Metric (mm/kg) |
Imperial (ft/lb) |
|
External Length |
6,058 mm |
19' 10.5" |
|
Internal Length |
5,898 mm |
19' 4.2" |
|
Internal Width |
2,352 mm |
7' 8.6" |
|
Internal Height |
2,348 mm |
7' 8.4" |
|
Door Opening Width |
2,340 mm |
7' 8.1" |
|
Max Gross Weight |
30,480 kg |
67,200 lbs |
|
Tare Weight |
2,350 kg |
5,180 lbs |
|
Max Payload |
28,130 kg |
62,020 lbs |
40ft Open-Top Container
Used for long, oversized equipment, pipes, or bulky industrial components.
|
Attribute |
Metric (mm/kg) |
Imperial (ft/lb) |
|
External Length |
12,192 mm |
40' 0" |
|
Internal Length |
12,032 mm |
39' 5.7" |
|
Internal Width |
2,352 mm |
7' 8.6" |
|
Internal Height |
2,348 mm |
7' 8.4" |
|
Door Opening Width |
2,340 mm |
7' 8.1" |
|
Max Gross Weight |
30,480 kg |
67,200 lbs |
|
Tare Weight |
3,950 kg |
8,710 lbs |
|
Max Payload |
26,530 kg |
58,490 lbs |
3. Key Component Descriptions
The Tarpaulin (TIR) and Lashing
The roof is replaced by a heavy-duty, reinforced PVC or canvas tarpaulin.
Flooring
Standard open-tops usually feature 28mm Keruing or Apitong plywood. This wood is specifically treated to withstand high point-loads from heavy machinery and is resistant to rot and insect infestation (TCT treated).
Wall Panels
The side walls are constructed from Corten steel (corrosion-resistant) corrugated panels. Because there is no roof to provide tension, the side walls of an open-top are often slightly thicker or more heavily reinforced than a standard 20ft/40ft unit.
4. Operational Advantages and Use Cases
Over-height Cargo: If cargo exceeds the standard height (approx. 2.39m), it can still be shipped in an open-top. However, "In-Gauge" refers to cargo that fits within the height of the walls, while "Out-of-Gauge" (OOG) refers to cargo that protrudes above the top rail.
Common Commodities:
5. Essential Safety and Handling Notes
Note on Stacking: Even with the tarpaulin in place, open-top containers can be stacked. However, if the cargo is Out-of-Gauge (protruding from the top), they must be placed on the top tier of a vessel or under-deck in a slot with sufficient clearance.
6. Summary Comparison Table
|
Feature |
20ft Open-Top |
40ft Open-Top |
|
Best For |
Heavy, dense, small-footprint loads. |
Long, bulky, or awkward loads. |
|
Crane Access |
Excellent (full length). |
Excellent (full length). |
|
Flexibility |
High (easy to transport inland). |
Medium (requires 40ft trailer). |
|
Structural Risk |
Low. |
Higher (long rails require careful handling). |