What is a ring joist?

A ring joist is a structural component found in the framing of a building, typically running horizontally around the perimeter of the foundation. It serves to tie together the floor joists, providing stability and support to the structure above. Additionally, the ring joist helps to distribute loads evenly and can also serve as a barrier against air and moisture infiltration, enhancing energy efficiency. It is often made from solid wood or engineered wood products.