What are the Size of the Semi Trailer?

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Globally, different countries have different requirements for the size of semi-trailers. Understanding the size of semi-trailers is directly related to the legality of a company’s transportation, operational safety, transportation efficiency, and economic benefits.The following provides a detailed introduction to the main dimensions and standard specifications of semi-trailers, as well as the key considerations to understand before purchasing.

Understanding the Importance of Semi Trailer Dimensions

Focus dimension The main objective
Height Make sure to cross the bridges and tunnels to avoid damaging the infrastructure.
Length Determine the turning flexibility to avoid affecting the route planning.
Width Make sure to drive in the designated lane and avoid excessive width penalties.
Internal volume Improve the efficiency of single-trip transportation and increase revenue.
1. Legal Compliance: Avoiding Hefty Fines and Legal Risks
Various countries have strict mandatory standards for the external dimensions (length, width, height) of semi-trailers.
For example, China implements the GB1589 standard, while the United States implements the DOT standard. If a vehicle’s dimensions exceed the legal limits, it may face hefty fines from road authorities and even be forced to unload and be impounded.
Cross-border Access: If you are engaged in cross-border transportation, understanding the size restrictions of the target country is a prerequisite for ensuring your vehicle can pass through customs smoothly and avoid being refused entry.
2. Driving Safety: Preventing the Risk of Collisions and Rollovers
Dimensions directly determine the vehicle’s physical limits and handling characteristics.
Height Restriction and Passability: Accurately understanding road height restrictions avoids roof scraping caused by excessively tall semi-trailers.
3. Loading Efficiency and Profitability: Maximizing Efficiency
The dimensions of a semi-trailer determine subsequent transportation efficiency.

Size of the Flatbed Trailer

The dimensions of flatbed trailers are usually defined according to the specific type of goods being transported. For example, the size requirements for flatbed trailers are completely different for transporting 20-foot, 40-foot, and 45-foot containers. It is important to communicate the container dimensions in advance so that an engineer can provide you with a design plan.

Region Length requirements Width requirement Cargo deck height requirements
China (GB1589-2016) 13.0m – 13.75m 2.55m 1.4m – 1.5m
United States (DOT Standard) 48ft – 53ft (14.6m – 16.1m) 2.6m 1.5m
European Union (EU) 13.6m 2.55m 1.25m – 1.5m

Lowbed Trailer Size

Total Length:Standard Lowboy trailers typically range from 13 to 13.75 meters in length. However, some specialized lowbed trailers can be extended to 20 or 30 meters using mechanical mechanisms to transport extra-long cargo.

Effective load-bearing surface length: refers to the flat area from the back of the gooseneck to the front of the wheelset. The effective load-bearing surface of a standard 13.75-meter vehicle is typically between 8.5 meters and 11 meters.

Width: Standard width of lowbed trailer: 2.55 meters or 3.0 meters. An extended design is available to accommodate extra-wide machinery; each side can be increased by 250mm when unfolded, bringing the total width to 3.5 meters.

Height – (Core parameter of lowbed trailer): The cargo surface height is typically between 0.85 meters and 1.2 meters.

The Size of the Fuel Tanker Trailer

The dimensions of an fuel tanker trailer directly determine its volume and driving safety. Since it transports liquid cargo, the size design must not only comply with road regulations but also consider the stability of the liquid’s center of gravity.

Load capacity volume (liters) Standard length(mm) Standard width (mm) Standard height (mm)
30,000L 9,500 2,500 3,600
40,000L 10,500 2,500 3,700
50,000L 11,500 2,500 3,750
50,000L-60,000L 12,500 – 13,000 2,500 3,850

 

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