The International Association of Bridge, Structural, Ornamental and Reinforcing Iron Workers Union, AFL-CIO, is a proud trade union whose roots go back to the 1890’s. The current membership stands at approximately 140,000, with 15,000 apprentices. Members of this union have worked on nearly every major construction project you can think of — The Golden Gate Bridge, The Sears Tower, The St. Louis Arch, The World Trade Center, and the World Trade Center recovery effort, to name a few.