8 Common Types of Shipping Containers Explained

The Complete Guide to Shipping Containers: Types, Dimensions, Manufacturers & Buying Tips

A shipping container is a standardized, reusable steel box built to transport cargo seamlessly across ocean vessels, freight trains, and trucks without unloading the goods inside. Regulated under ISO 668 standards, these intermodal units serve as the physical backbone of modern global trade, moving roughly 90% of all non-bulk sea freight worldwide..

Core Uses of Shipping Containers.

Beyond moving freight across oceans, shipping containers serve several commercial, industrial, and architectural functions..

Global Intermodal Logistics. Containers move everything from electronics and clothing to raw materials across ships, rail, and road networks..

Secure On-Site Storage. Construction sites, farms, and retail businesses use weather-tight units to store tools, inventory, and seasonal equipment..

Modular Architecture and Housing. Builders convert containers into affordable tiny homes, multi-story apartment complexes, pop-up cafes, and mobile offices..

Specialized Mobile Facilities. Engineers outfit units as portable data centers, emergency medical clinics, solar battery stations, and hydroponic farms..

Common Types of Shipping Containers.

Different cargo shapes, weights, and temperature needs require specialized container designs..

Dry Storage (General Purpose). The standard fully enclosed, weatherproof steel box used for everyday boxed, palletized, or bagged dry goods..

High Cube (HC). Identical in footprint to standard containers, these units add one extra foot of vertical height for bulky or lightweight cargo..

Refrigerated (Reefer). Insulated containers equipped with active cooling units that maintain temperatures between -30°C and +30°C for food and pharmaceuticals..

Open Top. Built with a removable tarpaulin roof instead of a solid steel top, allowing cranes to load tall machinery from above..

Flat Rack. Featuring collapsible end walls and no roof or side walls, these heavy-duty platforms carry oversized vehicles, pipes, and industrial equipment..

ISO Tank. A cylindrical stainless-steel pressure vessel mounted inside a standard rectangular steel frame to transport bulk liquids, gases, and chemicals..

Open Side (Side-Door). Standard dry boxes fitted with full-length folding doors along one side to simplify loading wide items with forklifts..

Standard Shipping Container Dimensions.

External dimensions follow strict international rules so cranes and chassis can lock onto any container globally. The table below outlines the specifications for the most widely used ISO sizes..

Container Size External Dimensions (L × W × H) Internal Dimensions (L × W × H) Internal Volume Max Payload.

10ft Standard 2.99m × 2.44m × 2.59m (10' × 8' × 8'6") 2.83m × 2.35m × 2.39m ~15.9 m³ (560 cu ft) ~8,860 kg.

20ft Standard 6.06m × 2.44m × 2.59m (20' × 8' × 8'6") 5.90m × 2.35m × 2.39m ~33.1 m³ (1,170 cu ft) ~28,200 kg.

40ft Standard 12.19m × 2.44m × 2.59m (40' × 8' × 8'6") 12.03m × 2.35m × 2.39m ~67.5 m³ (2,385 cu ft) ~26,700 kg.

40ft High Cube 12.19m × 2.44m × 2.90m (40' × 8' × 9'6") 12.03m × 2.35m × 2.70m ~76.3 m³ (2,695 cu ft) ~28,500 kg.

45ft High Cube 13.72m × 2.44m × 2.90m (45' × 8' × 9'6") 13.56m × 2.35m × 2.70m ~86.0 m³ (3,037 cu ft) ~27,800 kg.

Note: A standard 20-foot container equals 1 TEU (Twenty-foot Equivalent Unit), the universal metric used to measure ship capacity and port volume. A 40-foot container equals 2 TEUs..

Leading Container Manufacturers in China.

China produces over 85% to 90% of the world's new shipping containers, supported by massive domestic steel output, automated coastal factories, and immediate access to export cargo. The global market is dominated by a few major Chinese enterprises..

CIMC (China International Marine Containers). Headquartered in Shenzhen, CIMC is the world's largest container manufacturer, holding over 40% of the global market across dry, refrigerated, tank, and specialized units..

DFIC (Dong Fang International Container). A subsidiary of COSCO Shipping Development, DFIC ranks as the second-largest producer globally, operating major facilities for dry freight and reefer containers..

CXIC Group. Based in Changzhou, CXIC is a top-three global producer specializing in standard dry boxes, high cubes, open-top units, and flat racks..

Singamas Container Holdings. Operating out of Shanghai and Hong Kong, Singamas manufactures dry freight, tank, open-top, and specialized offshore containers..

Essential Details Often Overlooked.

When buying, leasing, or shipping with containers, several technical and regulatory factors are just as important as size and type..

Materials and Construction. Containers are built from Corten (weathering) steel, which forms a protective rust-resistant patina when exposed to marine salt air. Floors typically use 28mm marine-grade plywood treated against pests, though eco-friendly bamboo flooring is increasingly standard..

Condition Grading System. Buyers generally choose between One-Trip (New) units that carried a single load from Asia, Cargo-Worthy (CW) units certified for international sea transport, Wind and Watertight (WWT) units ideal for dry land storage, and As-Is damaged boxes..

The CSC Safety Plate. Every international shipping container must carry a valid Convention for Safe Containers (CSC) metal plate riveted to the outside door. This plate certifies structural integrity, maximum gross weight, stacking limits, and inspection dates..

Weight Terminology. Logistics operators track three weights: Tare Weight (the empty container), Payload (the maximum cargo weight allowed inside), and Maximum Gross Weight (Tare plus Payload combined)..

Corner Castings and Twistlocks. The eight steel blocks welded to a container's corners feature standardized holes that allow shipboard twistlocks, semi-truck chassis, and port cranes to lock units together securely..