Which joinery technique involves interlocking wooden pieces at right angles?

The correct answer, mortise and tenon joints, is a traditional and widely used joinery technique in woodworking. This technique is characterized by the way it connects two pieces of wood at right angles, making it particularly strong and stable.

In a mortise and tenon joint, one piece of wood (the tenon) has a protruding tongue that fits into a hollowed-out section (the mortise) of another piece. This interlocking method creates a tight fit that enhances the mechanical strength of the joint, allowing it to withstand various stresses effectively, such as tension and compression.

The mortise and tenon joint is especially popular in the construction of frames, tables, and cabinets due to its ability to hide the joint while providing excellent durability. Properly executed, this joint can be nearly invisible, further adding to the aesthetic appeal of the finished piece.

Understanding the strength and application of mortise and tenon joints helps woodworkers choose the most appropriate techniques for their projects, especially when aiming for a contemporary or traditional finish.