Lowboy semi trailers are also used to transport heavy cargo. Due to the low center of gravity of the trailer, it can transport huge cargo and avoid damage to the cargo. This trailer is designed to solve the overload problem of a large tonnage. Usually ordinary semi-trailers use a structure of two axles and one line, but dolly trailers can have multi-lines, such as 4 axles and 16 tires, and are usually used to transport heavy cargo. Each axle of a dolly trailer loads 50 percent of the weight. Many countries are only allowed to have each axle of a vehicle loading 10 tons.
We also can make different types of trailers, such as extendabale lowbed trailer, which can be used to transport extra-long goods or wind blades. It can also be used as an ordinary semi-trailer with multiple functions.