What is a band joist?

A band joist, also known as a rim joist, is a horizontal structural member that runs along the perimeter of a floor or ceiling. It provides support for the ends of the floor joists and helps distribute the weight of the structure evenly.

Band joists are typically made of the same material as the floor joists, such as wood or steel, and are attached to the ends of the floor joists to create a solid and stable frame. They help prevent the floor joists from twisting or warping and provide additional strength to the structure.

In construction, band joists are often used in conjunction with other framing elements to create a strong and durable floor or ceiling system. They are an essential component in the overall stability and structural integrity of a building.

Overall, band joists play a crucial role in supporting the weight of a structure and ensuring its stability and durability.