What isn’t structural steel fabrication? It doesn’t mean any type of welding that strengthens or repairs steel. Steel fabrication is a special skill that requires experience transforming raw components into products that meet and exceed various standards and codes. Here is what goes into the fabrication of structural steel. Structural steel fabrication is the process of bending, cutting, and modelling steel to form a structure. For structural steel fabrication pieces of steel are put together to make different structures that are usually of predefined sizes and shapes. It is a complex process that requires specialized knowledge, skills, and resources to complete successfully.