The Ironworker's Union is a labor union that represents ironworkers in the United States and Canada. The union was founded in 1896 and is affiliated with the AFL-CIO. The union's primary purpose is to protect the rights of ironworkers and ensure they receive fair wages and safe working conditions. The term 'WELD' is often used to refer to the process of joining two pieces of metal together using heat and pressure. Welding is an important skill for ironworkers, and is one of the skills required to be a member of the Ironworker's Union.