Shipping Container Types, Dimensions & Cargo Suitability

What Is a Shipping Container?

A shipping container is a standardized cargo transport unit designed to allow goods to move between different transportation modes with minimal handling of the cargo itself. Standardized container dimensions and corner fittings allow containers to move between ships, trucks, rail systems and cargo-handling equipment.

Not every container is designed for the same cargo. A dry container is suitable for many general cargo shipments, while reefer, open top, flat rack, tank, hardtop and other specialized equipment are intended for different cargo characteristics.

Container Sizes at a Glance

The following figures are representative examples for planning. Actual dimensions and weight limits vary by equipment manufacturer, fleet, carrier and individual container.

Dry Containers / General Purpose Containers

Current Hapag-Lloyd examples list approximately 33.2 CBM for a 20' standard, 67.7 CBM for a 40' standard, 76.3 CBM for a 40' standard high cube and 86.0 CBM for a 45' standard high cube. :contentReference[oaicite:2]{index=2}

Refrigerated Containers — Reefer

Reefer containers are refrigerated equipment designed for cargo requiring controlled temperature conditions during transportation. Compared with standard dry containers, reefer equipment has less internal cargo space because the refrigeration system occupies part of the container.

Open Top Containers

Open Top containers are useful for cargo that is difficult to load through standard container doors or cargo that benefits from top loading. They generally use a removable roof arrangement rather than a conventional fixed roof.

Flat Rack Containers

Flat Rack containers are specialized equipment with open loading areas and fixed or collapsible end structures. They are commonly considered for oversized or heavy cargo that cannot fit inside a standard dry container.

Hardtop Containers

Hardtop containers use a removable or specially designed hard roof arrangement that can provide easier top access than a conventional dry container while retaining a more rigid equipment structure.

Hapag-Lloyd's current equipment classification includes 20', 40' and 40' High Cube Hardtop equipment. :contentReference[oaicite:4]{index=4}

Tank Containers / ISO Tanks

Tank containers are standardized transport frames fitted with a tank designed for liquid, powder or other compatible bulk cargoes depending on the specific tank configuration and product requirements.

Hapag-Lloyd's current equipment classification distinguishes tank equipment for dangerous and non-dangerous liquids, including different ISO categories and test-pressure configurations. :contentReference[oaicite:5]{index=5}

Ventilated, Bulk & Platform Containers

Current Hapag-Lloyd equipment classifications include ventilated, bulk and platform categories in addition to general purpose, reefer, open top, hardtop, flat and tank equipment. :contentReference[oaicite:6]{index=6}

Complete Container Type Guide

External vs Internal Container Dimensions

The nominal external dimensions describe the overall equipment envelope. They are not the same as the usable internal cargo space.

These differences are why container planning should use actual cargo dimensions rather than only the nominal "20FT" or "40FT" label. :contentReference[oaicite:8]{index=8}

CBM Capacity Does Not Mean Full Usable Capacity

A container may have approximately 33 CBM, 67 CBM or 76 CBM of nominal internal capacity, but this does not mean cargo will always load efficiently to that exact volume.

Container Gross Weight, Tare & Payload

Maersk likewise notes that container cargo weight limits vary by container type, size and country-specific requirements. :contentReference[oaicite:10]{index=10}

Which Container Is Right for Your Cargo?

This flow is only a starting point. Actual equipment should be confirmed against the cargo's dimensions, weight, packaging, loading method, route, carrier availability and applicable requirements.

Container Selection by Cargo Type

Choosing Containers for Dangerous Goods

Dangerous goods do not automatically require one particular container type. The appropriate equipment depends on the physical form and classification of the cargo, packing method, transport mode, carrier requirements and applicable regulations.

Dry Container vs Reefer

For example, current carrier specifications illustrate that a 20' reefer has less internal capacity than a 20' standard dry container. Hapag-Lloyd lists approximately 28.1 CBM for its example 20' reefer versus 33.2 CBM for its 20' standard. :contentReference[oaicite:11]{index=11}

Open Top vs Flat Rack

The final choice depends on actual cargo dimensions, center of gravity, lifting method, securing points, route and carrier acceptance.

Container Loading & Cargo Planning

Selecting the right container is only the first step. The cargo also needs to be physically planned inside the equipment.

The practical container-loading process therefore combines dimensions, weight, packaging, stacking, securing and route requirements rather than relying only on theoretical CBM.

Container Selection and FCL vs LCL

Container Transportation by Truck

Selecting a container is not only a vessel or port decision. The container also needs to move by road. Container dimensions and gross weight can therefore affect trailer selection, road restrictions, route planning and final delivery.

The reverse movement applies to import cargo, where a container may move from the port after customs release to the consignee, warehouse or factory.

Containers, Warehousing & Cargo Handling

Containers may move to or from warehouses for stuffing, stripping, consolidation, deconsolidation, storage, cargo handling or distribution.

Container Shipping & Customs Clearance

Container selection does not remove customs requirements. Cargo description, HS classification, customs value, origin, packing details and applicable restrictions remain relevant to the customs process.

Container Shipping from Indonesia

For shipments originating in Indonesia, container selection should be considered together with the factory or warehouse location, port, cargo readiness, trucking route, customs requirements, carrier availability, destination and receiving facility.

Container availability and equipment type are trade-lane and carrier dependent. The correct container should therefore be confirmed against the actual booking and cargo requirements.

Smart Tools for Container Planning

Common Container Selection & Loading Mistakes

Container FAQ

Not Sure Which Container Your Cargo Needs?

Send us your cargo description, number of packages, dimensions, gross weight, CBM, loading method, origin and destination. NS Continent can help assess the appropriate container and logistics arrangement for your shipment.