A semi-trailer is a transport vehicle towed by a semi-trailer tractor; it comes in a wide variety of models and, based on its intended use and structure, can be classified into the following main types:
Stake-side Semi-trailer: Primarily used for transporting general cargo, such as construction materials, agricultural products, etc.
Stake-Side Semi-Trailer: Similar to a flatbed with sideboards, but features an open-cage structure at the top; suitable for transporting cargo requiring ventilation, such as live poultry, vegetables, etc.
Box-Type Semi-Trailer: Features an enclosed cargo box; suitable for transporting goods requiring protection from rain and dust, such as electronic products, food items, etc.
Flatbed Semi-Trailer: Features a flat platform structure without sideboards or an enclosed box; suitable for transporting oversized cargo, such as large-scale equipment, steel materials, etc.
Lowboy Semi-Trailer: Features a low-profile cargo deck; suitable for transporting over-height or overweight cargo, such as construction machinery, heavy equipment, etc.
Container Semi-Trailer: Specifically designed for transporting shipping containers; suitable for multimodal transport operations involving sea, rail, and road freight.
Tanker Semi-Trailer: Features a tank-shaped cargo vessel; used for transporting liquids or gases, such as petroleum products, chemicals, etc.
Dump Semi-Trailer: Features a cargo box capable of automatically tilting to discharge its load; suitable for transporting bulk cargo, such as sand, gravel, coal, etc.
Refrigerated Semi-Trailer: Features a cargo box equipped with refrigeration units; used for transporting goods requiring low-temperature preservation, such as frozen foods, pharmaceuticals, etc.
Specialized Semi-Trailer: Vehicle models designed to meet specific requirements-examples include hazardous materials trailers for transporting dangerous goods, and car carrier trailers for transporting passenger vehicles.
