1. What is a side wall trailer & fence semi trailer? FengYuan side wall trailer and fence semi trailer developed on the basis of a container flatbed trailer, these trailers have a side wall or stake structure design and wide range of uses.These cargo semi trailers use to load a wide range of products and materials, like sand, bags, poultry etc. Also the some bulk cargo, very widely used in the transportation industry. Suitable for the mid/long distance transportation of the mid/heavy duty and bulk cargo. It has become the first choice for medium and long distance freight trailers. The cargo semi-trailer can be added with a container turn lock to transport the container. What are the types of FengYuan dropside trailer? Our factory has 2 axle, 3 axle, 4 axle dropside trailer and fence semi trailer, grain trailer and the cargo drawbar trailer. And load capacity has 30/40/60/80/100 tons for your choice. Customizable side board hei...