Mortise & Tenon Joints
The mortise and tenon is one of the strongest joinery techniques utilized within the cabinet and furniture industry today. It is comprised of a mortise or groove cut in the side panel of the locker and a corresponding projecting tab. A mortise and tenon joint causes the top, bottom, and shelf to reside inside part of the side panel of the locker which will support the weight placed on these horizontal surfaces. When these two pieces are meshed together they form a joint that is virtually unbreakable.
Most lockers currently constructed utilize a butt joint where the screws hold the shelf, top, and bottom in place. However, when subjected to heavy backpacks and books, these screws can bend or pull out of the material. When using the mortise and tenon construction joinery, the horizontal panel is stronger.