The International Association of Bridge, Structural, Ornamental and Reinforcing Iron Workers is a union in the United States and Canada . They work on an apprenticeship system of training through a new generation of practitioners with on the job training accompanied by classroom work and reading taught by instructors who must be certified. These industrial photographic images are from the 35th Annual Ironworkers Instructor Training Program in Ann Arbor Michigan. Each year the they work to improve and strengthen what is already considered to be the best Instructor training Program in the industry.