Steel structure fabrication is typically completed in factories using standardized prefabrication processes. First, precise cutting is performed according to design drawings, employing CNC cutting equipment to ensure dimensional tolerances are controlled within millimeter-level accuracy. Components are then assembled into a unified structure through welding or high-strength bolt connections. During welding, process parameters are strictly controlled using automated welding equipment to guarantee weld uniformity, with critical welds subjected to ultrasonic flaw detection.