What joint configuration is typically used to create frames for doors and windows?

The joint configuration most commonly used to create frames for doors and windows is the corner joint. This joint allows two pieces of material to be joined at a right angle, which is essential in framing applications to provide the necessary structural integrity and alignment. In the context of doors and windows, corner joints are utilized to form the corners of the frame, creating a rectangular or square shape that can properly support the structure and maintain the intended dimensions.

Using corner joints ensures that the frames can effectively hold the weight of the door or window while providing a neat and flush finish. This type of joint can be reinforced with additional welding, screws, or brackets, depending on the specific design and load requirements. The corner joint's versatility and strength make it ideal for this application, which is critical for both functionality and aesthetics in door and window frames.