Classification and Future Trends of Fence Semi Trailer Design

1. Introduction of Fence Semi trailer

Fence semi-trailer, a cargo semi-trailer designed with a fence, is widely used in the transportation of agricultural and sideline products and other light goods. Due to its flexible and versatile design and comprehensive functions, the fence semi-trailer has quickly become popular in the market and has become the mainstream choice.

1.1 Advantages of Fence Semi Trailer

Due to its flexible and versatile design and comprehensive functions, the fence semi-trailer has developed rapidly in the semi-trailer market, and its types and structures are becoming increasingly perfect, becoming the mainstream choice in the semi-trailer industry. High end semi-trailer, with its unique advantages, has become an indispensable and important equipment for road transportation. Its high degree of specialization, large loading capacity, fast transportation, convenient disassembly, wide range of uses, and low investment cost have all enabled it to quickly popularize and be widely applied under the driving force of social and economic factors such as energy conservation and environmental protection.

2. Classification of Fence Semi trailers

2.1 Single layer and double-layer design

In order to meet the needs of various types of cargo transportation, the fence semi-trailer has gradually developed from a single door opening method to a variety of vehicle models including single-layer and double-layer warehouse grilles, long lock bar and short lock bar warehouse grilles. Single layer and double layer grille semi-trailer are common and long-standing types of grille structures. Among them, the single-layer grille semi-trailer has convenient disassembly characteristics, while the double-layer grille semi-trailer is more suitable for long-distance transportation due to its height advantage. The height of the space from the bottom plate to the top of the compartment of a single-layer compartment semi-trailer usually does not exceed 1.8 meters, which makes the dismantling of the compartment more convenient.

The design feature of a double decker semi-trailer with a grille is that the height of the space from the bottom plate to the top of the grille is usually over 1.8 meters. This design not only enhances the strength of the grille, but also provides more spacious storage space for goods. These two types of fence semi trailers play an important role in long-distance transportation, especially for the transportation of agricultural and sideline products, steel, and bulky light foam goods.

2.2 Long Lock Rod and Short Lock Rod

The long lock bar compartment semi-trailer, formerly known as the coal transport box semi-trailer, was very popular in its early days due to its side fully open door design and long lock bar structure. Long lock bar semi trailers are suitable for transporting bulk goods such as coal, while short lock bar models are more favored due to their lightweight and narrow lane applicability.

However, with the changing technical requirements of the country for box type semi trailers and their relatively large curb weight, long lock bar grille semi trailers have gradually emerged as a more popular choice. The top of the long lock bar compartment semi-trailer is designed to be open, which makes it easy to load with the help of mechanical equipment. The inner side of its warehouse grille is nailed with canvas, forming a basically enclosed space around it, thus possessing the function of a box car. When all the side doors are opened, the size of the door opening is quite spacious, enough to accommodate construction machinery such as forklifts for unloading operations. The coal, sand and gravel materials and other goods inside the carriage can be easily pushed out of the carriage through these machines, making the unloading process extremely convenient.

Single lock bar compartment semi-trailer is favored for its compact size and lower height from the bottom plate to the top of the compartment. The length of a short lock bar compartment semi-trailer is generally 13 meters, which is very suitable for driving and parking on narrow roads. Compared with the long lock bar compartment semi-trailer, the short lock bar model lacks a rim in the top design and has a shorter lock bar length, resulting in a lighter overall weight. The short lock bar silo semi-trailer is not only suitable for the transportation of coal and sand and gravel materials, but can also be widely used in the field of long-distance logistics transportation.

3. Impact of regulations and standards

3.1 Impact of New Regulations on the Industry

The new regulations have put forward higher requirements for the design and safety technology of compartment type semi-trailer, promoting industry standardization.

Interpretation of GB 1589-2016 "Limits for Dimensions, Axle Load and Mass of Road Vehicles" standard: This standard has a clear definition for fence semi trailer, that is, the cargo area adopts a cage or fence structure, and is independent of the cab. At the same time, the top of the cargo area must be equipped with a non removable top fence rod connected to the side fence.

Interpretation of the CB 7258-2017 "Technical Conditions for Safety of Motor Vehicle Operation" standard: This standard proposes multiple safety technical requirements for semi-trailer trucks, including the mandatory installation of air suspension, disc brakes, automatic adjustment arms, and splash prevention devices to ensure the safety of the vehicle during operation.

4. Future Development and Trends

4.1 Popularization of Disc Brakes

According to the new standard, semi trailers must be equipped with disc brakes to improve braking performance and ensure safety.

According to the standard requirements of CB 7258-2017, starting from January 1, 2020, newly produced rail type and compartment type semi trailers must be equipped with disc brakes to ensure the braking performance and safety of the vehicle during operation. This regulation will promote the widespread application of disc brakes in the field of semi trailers.

4.2 Mandatory Equipping of Air Suspension

The newly produced high-quality semi-trailer must be equipped with air suspension to further enhance the vehicle's driving stability. According to the GB7258 standard, starting from January 1, 2020, all newly produced dangerous goods transport trucks with a total mass of 12000kg or more, as well as dangerous goods transport semi trailers, and three axle rail and grille semi trailers, must be equipped with air suspension. This requirement will encourage air suspension to become standard in certain types of semi trailers.

4.3 Industry technology threshold improvement

The development trend of fence semi-trailer indicates that the industry's technological threshold is tending towards standardization and lightweighting under policy promotion. In recent years, policy guidance has shown that the development of grille semi trailers is moving towards standardization and lightweighting. This trend has driven the upgrading of the industry, with standardized production ensuring consistency in product quality, while lightweighting means being able to load more goods, thereby raising the overall technological threshold of the industry.

Mr. Owen Zhang

owen@vehiclemaster.com

+86 15269108961