This course provides a comprehensive overview of steel, including its production process, historical development, and role as a foundational material in modern construction. It covers how steel is made, as well as how manufacturing advances improved efficiency, consistency, and global use over time. A key focus is steel’s recyclability and life cycle. The course examines steel as the most recycled material on Earth. It also explores life cycle thinking and how steel supports circular economy principles that reduce environmental impact in construction.
Steel Door Institute (SDI)

Steel Door Institute (SDI) was established in 1954 as a non-profit business association that develops standards for steel doors and frames. These standards are available free of charge so architects can ensure quality and consistency of steel doors and frames. SDI members are the only manufacturers that have been audited to ensure they meet our standards.
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