"Top four and bottom eight" is a category of commercial vehicles, such as common dump trucks, heavy trucks and trailers. Generally speaking, "front four" means that the front steering wheel is two axle and four wheels, "rear eight" means that the rear driving wheel is two axle and eight wheels, and two wheels are installed on one side of each axle. "The first four and the last eight" are heavy-duty vehicles with large carrying capacity, which are often used in construction engineering, long-distance transportation and other fields.

In the previous transportation industry, because the "top four and back eight" has good stability, strong loading capacity, much more goods, and "all sizes" for goods, it has been favored by many car owners. However, after the introduction of gb1589, the overload control efforts have been greatly improved. The load limit of "the first four and the last eight" has been directly reduced by nearly 9t compared with the past. The loss of freight has forced many car owners to give up their love and began to focus on the 4 * 2 + 2 semi-trailer, which is commonly known as "one trailer and two trailers".

The front four, rear eight and one trailer and two semitrailers are also four axle vehicles. What's the difference between the two?

1. Cargo capacity: according to the provisions of gb1589, the weight of the first four and the last eight is about 13T, and the load capacity limit is 31t, which can be loaded in about 18t; The self weight of one trailer and two trailers is about 14T, the load limit is 36t, and the amount of goods that can be loaded is about 22T.

2. Loading volume: the total length of the first four and the last eight vehicles shall not exceed 12m. The carriage is generally about 9.6m long, 2.5m wide, 2.5m high and the total volume is about 60m 3； The maximum length of one trailer two compartment type is 13m, the inner width is 2.5m, the height is 2.5m, and the total volume is about 81m 3。

Of course, if it is a grille or rail type carriage, the volume of the two models is not much different.

3. Car purchase cost: the bare car price of the first four and the last eight loading cars with 400 horsepower on the market is generally about 300000, and the price after completing the formalities is about 350000; The price of a naked semi-trailer with one trailer and two trailers is about 350000, and it takes about 400000 to complete the formalities.

4. Driving license qualification: B2 driving qualification is required for the first four and the last eight, and A2 driving qualification is required for one trailer and two trailers.

It can be seen that after overload control, whether in terms of freight or vehicle cost, one trailer and two semi trailers are more suitable than the first four and eight trucks, but the purchase cost of one trailer and two semi trailers is more or less more than the first four and eight trucks, and the requirements for driver's license are also higher.

Of course, what kind of car to choose depends on the usual source of goods of the car owner:

1. If the source of goods is heavy and dumped, which is relatively chaotic, it is recommended to choose one trailer and two semi trailers, but the driver's license needs to be replaced;

2. If there are most heavy goods in the source of goods, you can add some cost and directly change a three axle semi-trailer;

3. If most of the goods are sold by lvtong and lvtong, the top four and the bottom eight may lose part of the freight of heavy goods.

The front four and rear eight trucks, one trailer and two semitrailers, are often used in the transportation industry. Safety and stability are very important. High quality products must be selected for the axle. However, the price of many axles in the market is very high, and individual axles can be sold for 9000 yuan or even 10000 yuan, causing high cost pressure to car owners. Darong group is the first enterprise to mass produce integrated axles in Liangshan commercial vehicle production base. Up to now, it has been 20 years, and its strength and technology occupy the forefront of the industry. Darong axle focuses on the high cost performance route, with rich product series, including disc axle, drum axle, low flat axle, concave axle and special axle. The quality has passed the relevant industry certification, with strict strength and toughness up to the standard, durability and resistance, and more affordable price, so that car owners can spend less money and use higher quality axles.