In the field of logistics transportation, there is a group of goods that are huge in volume and astonishing in weight. Their length, width, weight, etc. exceed the legal limits, and even exceed the passable limits of highways and bridges and culverts. They are structurally inseparable. Transporting such goods requires the use of special semi trailers, such as the four tracks and eight axles we talked about today.

A four line eight axle semi trailer belongs to a type of multi axis semi trailer. Generally, it is designed with four rows of wheels, with one row being the first line. Two axles are installed side by side on the first line, totaling eight axles. Four wheels are installed on one axle, resulting in a total of 32 wheels.

Due to the large number of wheels, the load capacity distributed on each wheel is relatively more uniform, which can reduce the pressure on the contact surface between the tire and the road, and avoid damaging the road while completing overweight transportation.

From this, it can be seen that four line eight axle semi trailers are legal, but only limited to transporting large and non detachable goods. Regarding the definition of large cargo, the official definition is as follows: the total height of vehicles and cargo from the ground exceeds 4m, the width exceeds 2.55m, the length exceeds 18.1m, and the total mass exceeds 49t.

In addition, if you want to use a four line eight axle semi trailer to transport goods, you need to go through relevant licensing procedures in accordance with the law, obtain the qualification for large-scale object transportation business, take effective measures, and drive the road according to the designated time, route, and speed. Without permission, you are not allowed to drive on the road. To apply for a permit for exceeding the limit of highway transportation, an application form for exceeding the limit of highway transportation, a road transportation operation permit, the identity document and authorization letter of the operator, a vehicle driving license or a temporary driving license plate, etc. shall be submitted.

The issue of how many tons of goods can be loaded on four lines and eight axles is also controversial among car owners, such as 100t, 108t, 200t, and so on. In fact, the amount of goods that can be loaded on four lines and eight axles can be determined based on their transportation qualifications. One type can carry first-class large objects, with a weight greater than or equal to 20t but less than 100t; The second class can carry first-class goods and also second-class large objects, with a weight of more than or equal to 100t but less than 200t; By analogy, the weight limit for heavy goods transported on three types of roads is greater than or equal to 200t and less than 300t; The weight limit for heavy goods transported on four types of roads is greater than or equal to 300t.

Of course, this does not mean that the loading capacity of multi axis large cargo transport vehicles is only related to transportation qualifications, but also depends on the body design, chassis configuration, single/multi vehicle traction method, and specific situation of the goods. Generally, three lines and six axles can transport goods within 80t, four lines and eight axles can transport goods within 100t, five lines and ten axles can transport goods within 120t, and so on.