Glossary > #Internal Dimensions

Internal Dimensions of Standard Shipping Containers

Shipping containers are key to the global supply chain. They serve as robust and secure vessels for transporting goods worldwide, fundamentally transforming modern logistics. These containers have become a logistics marvel, facilitating efficient movement of goods by rail, road, and sea. Understanding the internal dimensions of these containers is crucial for logistics planning, storage solutions, and innovative applications. This glossary entry delves into the intricate details of the internal dimensions of standard shipping containers, explains their significance, and provides a comprehensive overview of available variants.

Understanding the internal dimensions of standard shipping containers is fundamental for anyone involved in logistics, storage, or container-based construction. These dimensions determine how containers can be used and what types of cargo they can accommodate. As global trade continues to expand, the role of standardized shipping containers remains crucial, making knowledge of their specifications essential for efficient logistics planning. Whether for transporting goods or creating innovative spaces, these containers offer a world of possibilities limited only by the boundaries of their dimensions.

What are Shipping Containers?

Shipping containers are large, standardized boxes used to transport goods over long distances. They are designed to be easily loaded onto ships, trucks, and trains, facilitating efficient movement of cargo between different modes of transport. The International Organization for Standardization (ISO) establishes specific dimensions for these containers, ensuring they can be safely stacked and securely handled worldwide. Standardization, also known as containerization, revolutionized the shipping industry by reducing costs and increasing efficiency. The use of containers dramatically shortened ship turnaround times in ports and increased security by reducing theft.

Types and Sizes of Standard Shipping Containers

Shipping containers are available in various types and sizes to accommodate diverse transportation and storage needs. The most common types include:

  1. Standard Dry Containers: These containers are the most widespread, commonly available in 20-foot and 40-foot lengths. They are designed for transporting general cargo that does not require temperature regulation.
  2. High Cube Containers: Similar to standard containers but with an additional one-foot height, high cube containers are ideal for transporting bulky items requiring additional vertical space. They are available in 40-foot length.

Common Dimensions:

  • 20-foot Standard Container:
    • Exterior: 20ft (L) x 8ft (W) x 8.5ft (H), 6,058 m (L) x 2,438 m (W) x 2,591 (H)
    • Interior: 19’4″ (L) x 7’9″ (W) x 7’10” (H), 5,898 m (L) x 2,352 m (W) x 2,393 (H)
    • Door Opening: 7’8″ (W) x 7’5″ (H), 2.34 m (W) x 2.28 (H)
  • 20-foot High Cube Container:
    • Exterior: 20ft (L) x 8ft (W) x 8.5ft (H), 6,058 m (L) x 2,438 m (W) x 2,896 (H)
    • Interior: 19’4″ (L) x 7’9″ (W) x 7’10” (H), 5,898 m (L) x 2,352 m (W) x 2,698 (H)
    • Door Opening: 7’8″ (W) x 7’5″ (H), 2.34 m (W) x 2,585 (H)
  • 40-foot Standard Container:
    • Exterior: 40ft (L) x 8ft (W) x 8.5ft (H), 12,192 m (L) x 2,438 m (W) x 2,591 (H)
    • Interior: 39’5″ (L) x 7’8″ (W) x 7’10” (H), 12,032 m (L) x 2,352 m (W) x 2,393 (H)
    • Door Opening: 7’8″ (W) x 7’5″ (H), 2.34 m (W) x 2.28 (H)
  • 40-foot High Cube Container:
    • Exterior: 40ft (L) x 8ft (W) x 9.5ft (H), 12,192 m (L) x 2,438 m (W) x 2,896 (H)
    • Interior: 39’5″ (L) x 7’8″ (W) x 8’10” (H), 12,032 m (L) x 2,352 m (W) x 2,698 (H)
    • Door Opening: 7’8″ (W) x 8’5″ (H), 2.34 m (W) x 2,585 (H)

Explanation of Internal Dimensions

The internal dimensions of a shipping container are slightly smaller than the external dimensions due to the thickness of the walls and floor. These dimensions are crucial for determining cargo capacity and ensuring efficient packing. Key components affecting container internal dimensions include:

  • Wall Thickness: Made from corrugated steel, the walls take up part of the internal space.
  • Floor: Typically made from marine plywood or bamboo, the floor affects the internal height.
  • Roof and Ceiling: The corrugated roof can slightly reduce the internal height.

Calculating Payload and Cubic Capacity

Understanding payload and cubic capacity of a container is essential for optimizing storage and transportation efficiency.

Payload:

Payload capacity refers to the maximum weight a container can safely carry, calculated by subtracting the weight of an empty container (tare weight) from the maximum gross weight.

Cubic Capacity:

This is the total available volume inside the container for cargo, calculated using the shipping container internal dimensions. It is crucial for determining how much cargo can be loaded.

High Cube Containers: A Special Category

High cube containers are characterized by increased height, providing an additional foot of vertical space. They are particularly suitable for transporting light, bulky goods or for projects requiring more overhead space, such as converting containers into residential or office spaces.

Door Openings and Accessibility

Door opening dimensions are crucial for loading and unloading cargo. Standard and high cube containers have different door heights, with high cube offering a higher entry point. Width remains consistent across most types, ensuring compatibility with handling equipment.

Applications of Shipping Containers

While primarily used for transportation, containers have evolved into versatile structures used in many applications, from on-site storage and temporary offices to innovative architectural projects such as container homes and pop-up shops.