What type of joint is commonly used at the corners of cabinets?

The dado joint is a popular choice for corners in cabinet construction due to its strength and the way it allows for a snug fit between pieces of wood. In this joint, a slot is cut into one piece of wood, allowing another piece to fit into it. This design provides greater surface area for glue, resulting in a stronger bond, which is particularly important for cabinets that may need to support weight, such as shelving.

Dado joints are also advantageous because they can be hidden from view when positioned correctly, contributing to a clean and polished appearance in the finished cabinet. This feature is vital in cabinetry where aesthetics are as important as functionality.

While other types of joints, such as mitre, butt, or lap joints, may be suitable for different applications, they often do not provide the same level of structural integrity or hidden aesthetics in cabinet corner construction compared to the dado joint.