China 40FT Dropside Trailer Manufacturer
12.4 m dropside with 800 mm panels and 40 ton payload at 7.5 ton tare
As a leading Dropside Trailer Manufacturer, we specialize in designing robust, multi-functional transport solutions tailored to meet the dynamic demands of modern logistics. Our trailers feature a durable drop-side panel structure crafted from high-grade steel, enabling quick lateral loading and unloading of bulk cargo such as construction materials, agricultural products, and industrial equipment. The side panels can be easily lowered or removed, transforming the trailer into an open-top platform for oversized items, while reinforced corner posts and heavy-duty locking mechanisms ensure maximum security during transit.
- Length
- 12,400mm
- Width
- 2,500mm
- Drop Side Height
- 800mm
- Kingpin location
- 1,550mm from the front face of the front bolster
Built at SINOHENG Trailer Factory, Jinan, Shandong, China. Exported to 30+ countries across Southeast Asia, Africa, the Middle East and South America.
Operators This Trailer Is Built Around
- Logistics fleets standardising on one well-defined 40-foot dropside specification
- Distributors of construction materials, agricultural products and industrial equipment
Problems It Solves
Oversized items will not fit inside sides
Panels lower or come off completely, turning the trailer into an open-top platform for loads that overhang.
Corner posts fail before the panels do
Reinforced corner posts and heavy-duty locking mechanisms are part of the design rather than an upgrade.
What You Get For the Money
40,000 kg payload, 7,500 kg tare
12,400 × 2,500 mm with 800 mm drop sides and a G.V.W.R. of about 47,500 kg.
Defined running gear
Three FUWA 13-ton axles at 7,650 + 1,310 + 1,310 mm spacing, ten 13 × 90 mm leaf springs, six T30/30 spring brake chambers and twelve Linglong 12R22.5 tyres.
2 inch SAE bolted kingpin
Bolt-in type set 1,550 mm from the front bolster face, so replacement in the field is straightforward.
Technical Description
Technical Construction
Built with a focus on strength and adaptability, our 40FT drop side trailers incorporate a reinforced chassis with a low center of gravity to enhance stability, even when fully loaded. The trailers are engineered to support payloads up to 30-40 tons, depending on configuration, and are compatible with standard truck tractor units for seamless integration into existing fleets. Optional features include adjustable height settings, corrugated or smooth side panels, and corrosion-resistant coatings to withstand harsh environments.
Build and Finish
With a commitment to quality, every trailer undergoes rigorous testing and adheres to international safety standards, ensuring reliability and longevity. Our manufacturing process combines advanced automation with skilled craftsmanship, delivering precision-engineered trailers that optimize operational efficiency, reduce turnaround times, and minimize maintenance costs. Whether for regional distribution or long-haul transportation, our 40FT drop side trailers empower businesses to streamline cargo handling and maximize productivity.
Operating Detail
Partner with us to elevate your logistics capabilities with customizable, high-performance trailers designed to drive your success.
Manufacturing Notes
SINOHENG Trailer Factory is an enterprise specializing in the production and sales of trailers, dedicated to providing customers with high-quality and high-performance trailer products. We use high-strength steel and optimized design to ensure that the products maintain high load-bearing capacity while being lightweight, meeting customers’ dual demands for transportation efficiency and cost control.
China 40FT Dropside Trailer Manufacturer Specification Sheet
Figures below are the published specification for the standard build. Anything not listed is confirmed on the approval drawing before production, and we mark unknowns as TBC rather than estimating them.
| Length | 12,400mm |
|---|---|
| Width | 2,500mm |
| Drop Side Height | 800mm |
| Kingpin location | 1,550mm from the front face of the front bolster |
| Axle spacer | 7650mm+1,310mm+1,310mm |
| Payload | 40,000kg |
| Tare weight | Approx. 7,500kg |
| G.V.W.R. | Approx. 47,500kg |
| Main beam | Material Q345B. Fabricated “H” beam height 500mm, Top flange thickness 14mm, Middle web thickness 8mm, Bottom flange thickness 16mm |
| Side beam | 16# channel steel |
| Platform | 3 mm thick chequer plate with supporting channel |
| Crossbeam | 10# channel steel |
| Kingpin | 2” SAE Kingpin, bolted in type |
| Twist lock | Not included, can be optioned |
| Welding standard | All welding is to be done by a qualified welder per the applicable national standard. |
| Painting | Shot blast at Standard SA 2.5 before application of primer, water paint top coat. Total DFT not less than 80um |
| Suspension | Standard mechanical suspension 10 pcs leaf spring 13mmx90mm |
| Axle | FUWA brand axles, 3pcs*13ton capacity |
| Brake system | Dual line pneumatic brake, SAE hose, and connector |
| Brake chamber | 6 units T30/30 spring brake chambers |
| Air tank | 40L, 2 pcs, China |
| Emergency relay valve | WABCO relay valve |
| Tire | Linglong brand 12R22.5, 12 pcs |
| Rim | 9.00-22.5 steel disc wheel, 10 holes ISO,12 pcs. China |
| Landing gear | 28T two-speed telescopic manual landing gear |
| Voltage | 24 Volt |
| Receptacle | 7-way socket SAE standard, China |
| Lamp | WANAN brand LED |
| Mudguard | Steel mudguard |
| Spare wheel carriers | 1 pcs |
| Toolbox | 1 pc |
This Build in the Factory
How It Compares
This model publishes a complete specification, which makes it easy to compare against other suppliers line by line. If you need a different length, floor thickness or side height, our other dropside builds are quoted to order.
Operating Notes
- Check corner post locks each time panels are raised.
- Keep leaf spring U-bolts torqued to the manual's figures.
- Land the trailer on firm ground; a 7.5 ton tare on soft ground will sink the landing legs.
Every vehicle ships with an illustrated operation manual covering coupling, braking and turning technique.
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View specification →Questions About This Trailer
Can the 800 mm side height be changed?
Yes, side height is one of the custom design options. The figures above describe the standard build we quote from.
Is a spare wheel carrier included?
One spare wheel carrier is fitted as standard.
What is the difference from your other drop side models?
This is the fully specified 12.4 m standard build with fixed dimensions and brand parts listed. The other models are quoted around wider option ranges.
Do you ship to my country?
SINOHENG exports in bulk to 30+ countries and regions across Southeast Asia, Africa, the Middle East and South America. Send your destination port with the enquiry and we will quote delivery with the trailer.
Ask for a Drawing Before You Commit
We confirm dimensions, axle loads and coupling height on an approval drawing before any steel is cut, so the trailer is legal and couples to your tractors.