What do single axle, double axle and triple axle mean for trucks?

The single axle, double axle and triple axle of a truck generally refers to the number of axles of the truck, because now the toll is based on weight, and the toll based on weight is calculated based on the number of axles.

The second-axle truck is a vehicle with a single drive axle and one direction wheel.

The third-axle truck is a vehicle with a double drive axle and a single direction wheel or a double-direction wheel and a single drive axle.

Double The bridge is the same as the three bridges. There are always three bridges. The two in front are called front pairs, and the two in back are called back pairs. This is very general, because you don't know whether the second axle is an I-beam with one tire or a center axle housing with 2 tires. It is best to distinguish whether a truck has a front axle or a rear axle. There is one tire on each side of the front axle and two tires on each side of the rear axle. To be more professional, the front axle is called an I-beam, and the rear axle is called a rear axle housing.

According to the "Motor Vehicle Structural Terminology" trucks are classified as automobiles and divided into eight categories.

1. Ordinary trucks: Trucks whose loading parts are constructed with side panels, excluding trucks with automatic dumping devices.

2. Van: A truck whose cargo structure is a closed body and is independent of the cab.

3. Closed truck: The structure of the cargo area is a closed body and is integrated with the cab, and the body structure is a one-box truck.

4. Tank truck: A truck with a closed tank structure for loading parts.

5. Flatbed truck: A truck with a flat floor structure and no sideboards in the cargo area.

6. Container van: A truck with a frame structure and no floor in the cargo area, specially designed to transport containers.

7. Dump truck: A truck with an automatic dumping device in the cargo area.

8. Special structure truck: a truck with a special structure for the cargo area and is specially designed to transport specific items. For example: a double-decker structure truck for transporting cars, a multi-layer structure truck for transporting live poultry and livestock.

Reference materials: Trucks Baidu Encyclopedia