Mitre and End Lap Joints

A mitre joint is usually a 45° angle, to make a corner. It is often used in making picture frames. In woodwork, it is one way of joining two pieces of wood that meet at an angle. It is easy and attractive. It is one of the weakest joints, but it can be strengthened with a spline.

End lap joints are also called half lap joints. It is used when joining the end piece of wood at either parallel or at right angles. When the joint makes a corner, as in a rectangular frame, the joint is often called a corner lap.