One of the most basic shapes found in many woodworking projects is the basic box or case. Whether the box is vertical as found in a stereo cabinet, or horizontal as in a hope chest, the case derives its strength from a combination of the mechanical interlocking of the pieces, and the use of glue or fasteners.
The case furniture is seldom moved on any regular basis, and therefore the case joints are adequate to support the case structure. Should racking be a concern, interior dividers or case backs add the stiffness and mechanical stability required to prevent the case from deforming.
With very few exceptions, case joints involve the joining of end grain to end grain, or end grain to face grain. This is in contrast to edge joints, which deal with the joining of the long edges and faces of boards.
The following joints are classified as case joints: