A "fence type semi-trailer," also known as a "fence cargo semi-trailer," is a type of semi-trailer with a fence-like structure on the sides and potentially the rear. These trailers are commonly used for transporting bulk cargo, dry goods, livestock, and other items that require a degree of containment or protection from the elements. They are often preferred for their flexible loading capacity, lighter tare weight, and ability to handle various cargo types, including items like sand, bags, poultry, and even containers with the addition of a container turn lock, according to FengYuan Equipment.