What type of joint is most commonly used in framing?

The butt joint is most commonly used in framing because it is a simple and effective way to join two pieces of lumber at their ends or edges. This joint involves placing the end of one piece of wood against the face of another, typically lined up flush, which makes it particularly easy to construct. Butt joints can be quickly assembled, making them ideal for framing applications where speed and efficiency are important.

Additionally, framers often reinforce butt joints with fasteners like nails or screws to ensure structural integrity. While other joint types, such as dado, lap, and miter joints, do have their specific applications in woodworking, they tend to be more complex or suited for particular scenarios like cabinetry or decorative woodwork rather than the straightforward structural needs found in framing. This is why the butt joint stands out as the most prevalent choice in framing projects.