What are box lintels

What are box lintels

In this blog post, we will explore what box lintels are, their purpose, and why they are an essential component in construction.


Understanding Box Lintels

A box lintel is a structural component used to support the load above an opening in a building, such as doors or windows. Unlike traditional lintels, which are often simple horizontal beams, box lintels have a distinctive box-like shape, resembling an inverted U. This design enhances their load-bearing capacity and provides additional strength compared to conventional lintels.

Here are some key points about box lintels:

Purpose: Box lintels provide structural support over openings such as doors and windows in masonry walls. They help distribute the load from the wall above to the surrounding masonry.

Material: They are typically made from galvanized steel for durability and corrosion resistance.

Variety of Profiles:

  • Classic Box Lintels: These have a simple rectangular section.
  • Box Lintels with Toe: These provide additional support in specific masonry applications.


Construction Materials

Box lintels are commonly constructed from various materials, each offering unique advantages:



  • Steel box lintels are popular for their strength and durability. They are often galvanized to protect against corrosion, making them suitable for both interior and exterior applications.



  • Concrete box lintels are another common choice, known for their versatility and fire resistance. They are often used in residential and commercial construction projects.


Reinforced Masonry:

  • Some box lintels are constructed from reinforced masonry, combining the strength of bricks or blocks with additional reinforcing materials like steel bars.

Box lintels play a crucial role in ensuring the stability and longevity of buildings. These structural elements not only support the load above openings but also contribute to the overall aesthetic and architectural flexibility of a structure.

As we continue to innovate and push the boundaries of design, understanding the importance of elements like box lintels becomes paramount in creating safe, functional, and visually appealing spaces.

Check out our full range of box lintels.

If you feel lost about the choice of lintels, don’t hesitate to contact our specialists or by telephone on 020 8254 0066.