A butt joint is made by placing the end of one piece of wood against the side of another and fastening them firmly to each other.

A butt joint is not very strong joint, but it can be reinforced in a number of ways.

 

Butt joints reinforced with biscuits

Butt joints reinforced with dowels

Butt joints reinforced with screws

Butt joints reinforced with spline

Butterfly joint

Pocket hole butt joints

Simple butt joints