What Are Shipping Container Walls Made Of?

If you’ve ever wondered what materials are used to construct shipping container walls, you’ve come to the right place! In this article, we’ll explore the fascinating world of shipping container architecture and uncover the secrets behind their sturdy and durable walls. From the materials used to the construction process, get ready to dive into the world of shipping container walls and uncover the key ingredients that make them so reliable. So, sit back, relax, and let’s embark on this exciting journey together!

Overview

Basic explanation

Shipping containers, often used for transporting goods across the world, are typically constructed with durable walls that are designed to withstand the rigors of transportation. These walls play a crucial role in protecting the contents of the container and ensuring that they arrive at their destination intact. In this article, we will explore the various types of shipping container walls, the materials used to construct them, and their unique properties.

Types of Shipping Containers

Standard containers

Standard shipping containers are the most common type of container used in the industry. They have a maximum height of 8 feet 6 inches and provide ample storage space for a wide range of goods. They are well-suited for transporting general cargo, such as electronics, furniture, and clothing.

High cube containers

High cube containers, on the other hand, offer additional height, measuring up to 9 feet 6 inches. This extra vertical space allows for the transportation of taller and bulkier items that may not fit in a standard container. High cube containers are often used to transport machinery, vehicles, and oversized equipment.

Open-top containers

Open-top containers are designed with a removable roof, allowing for easy loading and unloading of goods from the top. These containers are ideal for transporting heavy and oversized cargo that cannot fit through the conventional doors of a standard container. They are commonly used for transporting construction materials, large machinery, and industrial equipment.

Flat rack containers

Flat rack containers are characterized by their collapsible sides, which provide easy access to the cargo within. These containers are frequently utilized for shipping large and irregularly shaped items, such as pipes, timber, and vehicles. The collapsible sides allow for efficient loading and unloading, making flat rack containers a flexible and versatile shipping option.

Refrigerated containers

Refrigerated containers, also known as reefers, are specifically designed with temperature control capabilities. These containers are equipped with a refrigeration unit that regulates the internal temperature, ensuring that perishable goods, such as food and pharmaceuticals, remain fresh and intact during transportation.

Materials Used in Shipping Container Walls

Corten steel

The walls of shipping containers are primarily constructed using a high-quality steel known as Corten steel. Corten steel is renowned for its exceptional strength and durability, making it an ideal choice for withstanding the harsh conditions of maritime transportation. This weathering steel contains alloys that provide enhanced resistance to corrosion and rust, ensuring that the container walls remain intact even in corrosive environments.

Wood and plywood panels

In some instances, shipping container walls may incorporate wood and plywood panels. These panels are often used for interior cladding, providing a more aesthetically pleasing and comfortable environment for the contents of the container. Additionally, wood and plywood panels offer insulation properties, helping to regulate the temperature and protect the goods from external elements.

Fiberglass reinforced panels

Fiberglass reinforced panels (FRP) are another material option for shipping container walls. These panels consist of a layer of fiberglass embedded within a resin matrix. FRP panels offer excellent strength-to-weight ratio, making them a lightweight yet durable choice for container walls. They are resistant to corrosion, UV rays, and impact, providing reliable protection for the cargo.

Corten Steel

Composition

Corten steel, also known as weathering steel, is composed of a combination of iron, chromium, copper, and nickel. The addition of these alloys enhances the steel’s corrosion resistance and forms a protective outer layer of rust-like appearance, which gives Corten steel its distinctive look.

Properties

Corten steel exhibits remarkable strength and toughness, making it highly resistant to mechanical damage and impacts. It withstands extreme temperatures and fluctuating weather conditions, making it suitable for long-term outdoor exposure. Corten steel is also known for its self-repairing qualities, as the rust layer that forms protects the underlying steel from further corrosion.

Advantages

The use of Corten steel in shipping container walls offers several advantages. Firstly, its exceptional strength provides structural integrity and protection for the cargo. Secondly, its resistance to corrosion ensures that the container walls remain intact, even in maritime environments. Additionally, Corten steel requires minimal maintenance, reducing overall costs and efforts associated with upkeep.

Disadvantages

One potential disadvantage of Corten steel is its initial cost, as it is generally more expensive than traditional carbon steel. However, this cost is often offset by the material’s long lifespan and reduced maintenance requirements. Additionally, Corten steel may require additional protection for sensitive cargo, as the rust-like appearance can potentially transfer onto the goods.

Wood and Plywood Panels

Composition

Wood and plywood panels used in shipping container walls are typically made from various types of timber, such as pine or plywood. These panels consist of multiple layers of wood bonded together using adhesives, ensuring strength and stability.

Properties

Wood and plywood panels offer insulation properties, helping to regulate the temperature within the container. They are also known for their soundproofing capabilities, reducing noise pollution during transportation. Furthermore, the natural texture and appearance of wood create a welcoming and comfortable interior environment.

Advantages

The inclusion of wood and plywood panels in shipping container walls offers numerous advantages. Firstly, they provide additional insulation, helping to maintain a consistent temperature and protect the contents from extreme weather conditions. Secondly, the aesthetic appeal of wood creates a more inviting space for both cargo and personnel working within the container. Lastly, wood and plywood panels are readily available and cost-effective compared to other materials.

Disadvantages

Wood and plywood panels may be susceptible to water damage and rot if not properly sealed or maintained. The presence of moisture can compromise their structural integrity and lead to mold growth. Additionally, wood is combustible, which may pose a fire hazard if strict fire safety measures are not in place.

Fiberglass Reinforced Panels

Composition

Fiberglass reinforced panels (FRP) used in shipping container walls are composed of a layer of fiberglass that is embedded within a resin matrix. This combination of materials creates a strong and lightweight panel.

Properties

FRP panels possess remarkable strength, despite their lightweight composition. They are resistant to corrosion, making them suitable for maritime transportation. FRP panels also exhibit excellent durability and impact resistance, ensuring the protection of the cargo during transportation.

Advantages

The use of fiberglass reinforced panels in shipping container walls offers several advantages. Firstly, their lightweight nature contributes to fuel efficiency during transportation, reducing overall costs. Secondly, FRP panels are resistant to corrosion and UV rays, ensuring the longevity and structural integrity of the container walls. Additionally, the ease of installation and maintenance of FRP panels makes them a convenient choice for shipping containers.

Disadvantages

One potential disadvantage of FRP panels is their vulnerability to cracking under certain impacts. Although they offer excellent impact resistance, significant force or a sharp object may cause damage to the panels. Additionally, the manufacturing process of FRP panels can be more complex and costly compared to other materials.

Insulation and Additional Materials

Insulation materials

In order to regulate the temperature and protect the contents of a shipping container, insulation materials are often added to the walls. Some commonly used insulation materials include foam boards, spray foam, and reflective insulation. These materials help to create a stable environment within the container, preventing heat transfer and maintaining a consistent temperature.

Interior finishes

To enhance the interior of the shipping container and improve the comfort of personnel or the safe storage of delicate goods, various interior finishes can be applied. This may include the use of moisture-resistant paints, wall coverings, or additional cladding. These finishes add a layer of protection and aesthetic appeal to the container walls.

Corrosion protection

To further protect the container walls from corrosion, additional coatings or treatments may be applied. This may include the use of anti-corrosion paints, galvanization, or chemical treatments. These protective measures ensure the longevity and durability of the shipping container, preventing the degradation of the walls and maintaining the integrity of the cargo.

Structural Integrity of Shipping Container Walls

Interlocking system

One of the key elements contributing to the structural integrity of shipping container walls is the interlocking system. The walls of a shipping container are designed to interlock with each other, creating a reinforced and sturdy structure. This interlocking system ensures that the container can withstand the forces exerted on it during transportation, such as wind, waves, and stacking.

Corner castings

Corner castings are integral components of shipping container walls. These robust metal pieces are located at the top and bottom corners of the container and provide secure anchor points for lifting and securing the container. They contribute to the structural stability of the walls, allowing for safe handling and transportation.

Floor support beams

Floor support beams play a crucial role in distributing the weight of the cargo within the container. These beams run parallel to the length of the container, providing additional strength and support to the walls. They ensure that the container can withstand the load imposed on it without compromising its structural integrity.

Roof and corner posts

The roof and corner posts of a shipping container are essential components that contribute to the overall strength and stability of the walls. These posts provide vertical support and reinforcement, ensuring that the container can withstand external forces, such as heavy stacking or impact during transportation. The connection between the roof and corner posts creates a rigid structure that enhances the container’s durability.

Modifications to Shipping Container Walls

Cutting openings

Shipping container walls can be modified by cutting openings to allow for windows, doors, or ventilation systems. These modifications can greatly enhance the functionality and accessibility of the container, making it suitable for various uses, such as offices, living spaces, or retail stores. The openings are carefully calculated to ensure that the structural integrity of the walls is maintained.

Adding windows and doors

By adding windows and doors to shipping container walls, the container can be transformed into a livable or workable space. Windows provide natural light and ventilation, while doors allow for easy access. These modifications enable the container to serve as a comfortable and functional area, meeting the specific requirements of its intended use.

Installing insulation

To improve the energy efficiency and comfort of a shipping container, insulation can be installed within the walls. This involves adding insulation materials, such as foam boards or spray foam, to regulate the temperature and reduce heat transfer. Proper insulation ensures that the container maintains a comfortable environment for its occupants or protects sensitive cargo from extreme temperatures.

Creating partitions

Shipping container walls can also be modified by creating partitions or dividing the interior space into separate compartments. This allows for greater organization and functionality within the container, enabling the storage of different types of goods or the creation of separate living or working areas. Creating partitions requires careful planning and consideration of the container’s structural integrity.

Conclusion

Shipping container walls are made from various materials, each with its unique properties and advantages. The use of Corten steel provides exceptional strength and corrosion resistance, ensuring the durability of the container walls. Wood and plywood panels offer insulation and aesthetic appeal, while fiberglass reinforced panels offer lightweight durability. By understanding the materials and construction of shipping container walls, one can appreciate their importance in protecting goods during transportation and optimizing the functionality of shipping containers. As the demand for shipping containers continues to grow, advancements in material technologies and modifications will further enhance the efficiency and versatility of container walls.