Which method is commonly used to join wood pieces at right angles?

The mortise and tenon joint is a traditional and highly effective method for joining wood pieces at right angles, particularly when considering the strength and stability of the connection. This joint consists of a protruding "tenon" on one piece of wood that fits into a "mortise" or hole in the adjoining piece. The design allows for a strong mechanical bond, which is especially useful in applications like framing or furniture-making, where durability is paramount.

The mortise and tenon joint can also provide significant resistance to racking forces (sideways movement) and can be further reinforced with glue or pegs, ensuring a solid structural integrity. Its ability to be crafted with precision allows for tight fits, which enhances its strength and aesthetic appeal.

In contrast, while other joints such as butt joints, dado joints, and lap joints also serve their purposes in woodworking, they generally do not provide the same level of strength and alignment specifically tailored for right angle connections that the mortise and tenon joint excels in. This characteristic makes the mortise and tenon joint a preferred choice for craftsmanship that requires both function and form.