The attributes and benefits of open web steel joists and steel deck are well-known to the civil engineering community. Their efficiency, high strength-to-weight ratio, versatility, ease of erection, high durability, and cost-effectiveness make steel joists and deck pivotal elements of today’s roofing and flooring systems. However, less often discussed is how steel joists and deck are produced, leaving engineers and decision-makers curious about the production processes that occur in the manufacturing plant. This presentation will shed light on the typical life-cycle stages of steel joists and deck, leading the audience into the realm of steel manufacturing. The sustainability features of steel joists and deck will be described. Considerations on how steel joists and deck can support a circular economy and zero-waste policies will be discussed.