4 Axle Flatbed Semi Trailer for 20FT 40FT Container Transport
Product Description
The 4 Axle Flatbed Semi Trailer for 20FT 40FT Container Transport is a heavy-duty transportation solution designed for container logistics, general cargo, construction materials, steel products, and industrial freight. With a 70-ton loading capacity and reinforced 4-axle configuration, the trailer provides reliable load distribution and stability for demanding transport operations.
The trailer features a Q345/T700 high-strength steel chassis, reinforced 500 mm main beam, and durable 3 mm loading platform. 12 sets of twist locks provide secure container positioning, making the trailer suitable for transporting standard 20FT and 40FT shipping containers as well as various types of general cargo.
ROADKING offers customized dimensions, suspension systems, tire and rim options, front boards, and other configurations to meet different cargo requirements, road conditions, and regional transportation needs.

Technical Specifications
| Parameter | Specification |
| Brand | ROADKING |
| Product Name | 4 Axle Flatbed Semi Trailer |
| Overall Dimension | 13950 × 2500 × 1600 mm (Customizable) |
| Loading Capacity | 70 Tons |
| Axle Configuration | 4 Axles |
| Suspension System | Mechanical Suspension / Air Suspension (Optional) |
| Chassis Type | Gooseneck Type / Tandem Type |
| Main Beam Material | Q345 / T700 High-Strength Steel |
| Upper Plate Thickness | 16 mm |
| Middle Plate Thickness | 10 mm |
| Lower Plate Thickness | 18 mm |
| Main Beam Height | 500 mm |
| Platform Thickness | 3 mm |
| Tires | 12R22.5, Linglong / Triangle / Double Coin / Other Brand |
| Rims | 9.00 × 22.5, Steel / Aluminum |
| Leaf Spring | 90 × 13 mm × 10 pcs / 90 × 16 mm × 10 pcs |
| King Pin | #50 (2") / #90 (3.5"), JOST / Other Brand |
| Landing Gear | 28 Ton Two-Speed, JOST / Other Brand |
| Twist Locks | 12 Sets |
| Front Board | Optional |
| Packing | According to Packing Requirements |
| Painting | Powder Coating |
| Customization | Dimensions, Suspension, Tires, Rims, Front Board and Accessories |
Specifications and configurations can be customized according to customer requirements and local transportation conditions.


Key Advantages
1. 70-Ton Heavy-Duty Loading Capacity
The reinforced chassis and four-axle configuration provide strong load-bearing performance and effective load distribution, making the trailer suitable for heavy-duty container and general cargo transportation.
2. 20FT & 40FT Container Compatibility
Equipped with 12 sets of container twist locks, the flatbed trailer is designed for secure transportation of standard 20FT and 40FT shipping containers, providing flexibility for port and logistics operations.
3. Q345 / T700 High-Strength Steel Chassis
The main frame is manufactured from Q345/T700 high-strength steel, providing excellent structural strength and durability for repeated heavy-load and long-distance transport.
4. Reinforced 500 mm Main Beam
The main beam features a 16 mm upper plate, 10 mm middle plate, and 18 mm lower plate, helping improve bending resistance and structural stability under demanding loads.
5. Stable 4-Axle Configuration
The four-axle running system distributes cargo weight across multiple axles, providing improved stability for heavy-duty freight and container transportation.
6. Flexible Customization
Trailer dimensions, mechanical or air suspension, tires, rims, front board, king pin, landing gear, paint, and other components can be configured according to customer requirements and operating conditions.

Application
The 4 Axle Flatbed Semi Trailer is suitable for container logistics companies, freight operators, port transport companies, construction contractors, and industrial transportation businesses.
Typical applications include:
- 20FT container transportation
- 40FT container transportation
- Port-to-warehouse container logistics
- General cargo transportation
- Steel pipes and structural steel
- Construction and building materials
- Machinery and industrial equipment
- Timber and packaged cargo
- Heavy-duty commercial freight
- Long-distance logistics transportation
Its open flatbed platform provides flexible cargo loading, making the trailer suitable for operations between ports, container terminals, warehouses, logistics centers, construction sites, factories, and inland distribution centers.
Structural & Design Highlights
Heavy-Duty 4-Axle Chassis
The reinforced four-axle chassis is designed to provide effective load distribution and stable performance for 70-ton heavy-duty transportation.
Reinforced Main Beam Structure
A 500 mm high main beam combined with 16 mm upper, 10 mm middle, and 18 mm lower plates provides strong structural support and resistance to deformation.
12-Set Container Twist Lock System
The integrated twist lock system securely connects standard shipping containers to the trailer platform, supporting flexible 20FT and 40FT container transportation.
3 mm Heavy-Duty Flatbed Platform
The durable steel loading platform provides a practical surface for containers, machinery, steel products, construction materials, and other general cargo.
Mechanical / Air Suspension Options
Mechanical suspension provides durability for demanding transport conditions, while optional air suspension is available for different road and cargo requirements.
Optional Front Board Design
A front board can be added according to cargo type and operating requirements, providing additional flexibility for general cargo transportation.
Powder-Coated Surface Protection
Powder coating provides a durable surface finish and helps improve corrosion and weather resistance during long-term operation.







