Fabrication is the process of manufacturing individual components or sections of a structure from raw materials, typically in a workshop or factory. Erection is the subsequent process of assembling and installing those fabricated components at the construction site to form the final structure.

• Cutting: Using methods like laser, plasma, or waterjet cutting to slice materials to the precise sizes and shapes required by engineering drawings.
• Bending: Shaping materials with machines like press brakes to achieve the necessary angles and forms.
• Welding: Permanently joining metal parts together using heat or pressure.
• Machining: Using precision tools to shape and finish metal parts to exact specifications.
• Assembly: Putting together the cut, bent, and welded pieces into larger, sub-assembled sections.
• Finishing: Applying coatings, such as primers and paint, to protect the components from corrosion.
• Quality control: Inspecting the finished components to ensure they meet technical specifications before being shipped to the site. 

• Logistics: Transporting the fabricated components from the workshop to the construction site.
• Preparation: Verifying that foundations and other prepared areas are correct and ready for the assembly.
• Assembly: Lifting and positioning heavy, fabricated parts with equipment like cranes, hoists, and scaffolding.
• Connection: Securing the components together, typically through bolting or welding.
• Alignment: Adjusting the assembled frame to ensure it is within specified tolerances.
• Safety: The process requires extensive safety measures due to the risks of working at heights and with heavy materials.