How many meters is the longest semi-trailer that can be accessed?

For semi-trailer owners, the main source of profit is freight, the longer the bucket, or the higher the fence, the more goods can be loaded naturally. Many owners are ready to change the car to consider how to make the vehicle as long as possible, but afraid to buy after the card. So, under the current standard, the length of the semi trailer can do how many meters?

According to GB 1589-2016 Limits for external Dimensions, axle Load and Mass of Automobiles, Trailers and Automobile Trains:

1. For rail-plate type, warehouse grid type, flat-plate type and self-dumping type semi-trailer, the length limit of one axle is 8.6 meters, the length limit of two axles is 10 meters and the length limit of three axles is 13 meters;

2. The length limit of other semi-trailers is 13.75m, and the length limit of semi-trailers transporting containers is 13.95m;

3. The length limit of the trailer with middle axle and traction rod is 12 meters, including the length limit of the carriage is 8 meters (except the vehicle transport trailer with middle axle);

4. The length limit of hinged train is 17.1 meters, and the length limit of long-end hinged train is 18.1 meters;

5. The length of freight train is limited to 20 meters, and the length of vehicle transport train with middle axle is limited to 22 meters.

Purely from the perspective of regulations and standards, the more dominant is the middle axle, especially the middle axle vehicle transport train, also known as the sedan car, which is specially used for the transport of passenger cars. Its length can reach 22 meters, compared with the hinged train, that is, the main car + semi-trailer, the length can be more than 5 meters.

Don't underestimate the 5 meters, used for cargo transportation, but not a small space. But is the middle axle worth buying? Let's analyze its advantages and disadvantages in detail.

Advantages of middle axle vehicles:

1. The vehicle chassis is lower.

As we all know, the semi-trailer traction power from the tractor, the middle axle trailer is different, its power from the front of the truck chassis, so its tow hook is usually set on the chassis of the front car, from the height of the traction pin is lower than the semi-trailer, therefore, the chassis of the middle axle trailer can also do lower.

Once the chassis is shorter, many advantages become apparent: the center of gravity is lower, the vehicle is more stable, and the operation is safer; When the upper limit is high, the traffic is stronger. For mid-axle coupes, the low chassis means you can stack double rows up and down for more capacity.

2. The vehicle length is longer.

As we have mentioned before, a longer length means a larger quantity of cargo. Needless to say, this point is worth mentioning.

3, bend through strong.

The wheels of the middle axle trailer are in the middle of the carriage, so the wheelbase is shorter and the turning radius is smaller. When it comes to a relatively small corner, the semi-trailer can't turn over, but the middle axle trailer may turn over. Therefore, a mid-axle trailer can be made longer for the same turning radius.

Disadvantages of middle axle vehicle:

1. The product is not mature enough.

The wheels of the middle axle trailer are in the middle of the carriage, and it is easy to swing up and down or around when running, which affects the smoothness of the vehicle to a certain extent. In addition, there is almost no gap between the front car and the cargo car of the middle axle trailer. Once the front car needs to brake, the rear car will push forward due to inertia. If there is a fierce collision, the cab can not move back, and the safety is worrying.

2. The price is on the high side.

Compared with the semi trailer, the cost of using the middle axle trailer is higher. For example, if the semitrailer bucket is broken, it can be directly changed into a new bucket, but the front of the middle axle trailer and the bucket are matched. If you want to change the car, the matching must be considered, which increases the cost of using the car virtually.

3. High requirements for road conditions.

Mid-axle trailers have a lower chassis. Although they have advantages on high-limit roads, at the same time, the low chassis can easily cause the vehicle to be unable to adapt to bad road conditions.

In addition, it is not a disadvantage, but only a constraint. That is, the driver of the mid-axle trailer must be A2 license or above. After all, there are many differences between the driving of the mid-axle vehicle and the semi-trailer.

Perhaps also because of these reasons, although the middle axle trailer for many owners optimistic, but there has been no big movement in the market, but, as the current regulations of the "green plate" model, coupled with the future transport market modular, standardized trend, the middle axle vehicle in the domestic logistics industry still has a certain development prospects.

No matter what kind of transportation model, but also need to match high-quality trailer axle, in order to be good at the field of transportation, play a better benefit. Shandong DARO Group is the first enterprise in Liangshan commercial vehicle production base to mass-produce integrated axles. It has changed the traditional three-joint welded axles, and the heavy-duty performance of trailer axles has been greatly improved. In the past 20 years of operation, with stable and reliable quality and ultra-high cost performance, it has established a good cooperative relationship with many trailer enterprises, logistics companies, transport fleets and retail investors. Help car owners reduce the cost of comprehensive vehicles to achieve energy conservation, efficiency and emission reduction.