A fence semi-trailer is manufactured through a precise, multi-step industrial process. High-strength steel is first cut and welded to form the main chassis and side fence structure, ensuring load stability and compliance with weight regulations. Axles, suspension systems, braking components, and landing gear are then installed and aligned for safe operation. The trailer floor is fitted with patterned steel or wooden panels, followed by surface treatment such as shot blasting and painting or galvanizing for corrosion resistance. Finally, the complete trailer undergoes load testing, braking inspection, and quality certification before delivery.