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Semi Trailer Manufacturer & Supplier for Heavy-Duty Freight and Specialized Cargo Transport

Heavy-duty semi trailers engineered for intermodal container freight, heavy equipment haulage, bulk material logistics, and specialized cargo transport. We manufacture high-tensile steel semi trailers configured to meet regional axle weight mandates and strict highway safety regulations across global markets.

Our semi trailers are constructed using high-strength structural steel frames, robotic submerged arc welding, and industry-standard running gear components. Built to accommodate tractor fifth-wheel heights from 1,150 mm to 1,350 mm, these trailers cover payload capacities ranging from 30 to 100 metric tons.

Three-axle Semi-trailer With Side Curtains
This three-axle side curtain semi-trailer adopts high-strength steel frame and heavy-duty waterproof PVC sliding curtains. It allows full side opening for fast forklift loading and unloading.
Three-axis Container Flatbed Trailer
This 3-axle container flatbed semi-trailer fits 20ft and 40ft standard containers, also suitable for steel, machinery and other heavy cargo. It adopts high-strength frame with strong load capacity,
Dump Semi-trailer
Rear tipping semi trailer with high-strength cargo box and reliable hydraulic lifting system. It is ideal for transporting sand, stone, ore and bulk materials. Custom dimensions available, popular in
Vehicle Transport Semi-trailer
You’re at the car dealership or transport yard, ready to move multiple vehicles to a new location. Your old trailer only holds 3 cars, has unstable decks, and takes forever to load. You need
Log Transport Semi-trailer
You’re in the forestry or lumber industry, moving large volumes of logs from the harvest site to the mill. Generic flatbeds lack the secure support needed to prevent logs from shifting, leading to
Stake-Side Semi-Trailer
The stake-side semi-trailer is designed for versatile cargo transport, ideal for general freight, agricultural goods, and palletized loads. Its high, open-sided structure offers flexible loading
6-Axle Rear-Tipping Dump Semi-Trailer
You’re hauling massive volumes of sand, gravel, or mining ore, where every load counts. Standard trailers lack the capacity to keep up with your operations, while fragile designs risk breakdowns
Heavy-duty Low-bed Semi-trailer
This heavy-duty low-bed semi-trailer is purpose-built for moving heavy construction machinery like excavators and bulldozers. Unlike standard trailers, this semi-trailer features an ultra-low deck
3-Axle Low-bed Semi-trailer
This is a 3-axle low-bed semi-trailer with a drop deck design, purpose-built for transporting construction machinery, heavy equipment, and oversized cargo. The low deck height allows you to haul tall
Concave-beam Low-bed Semi-trailer
You’re at the construction site, ready to move heavy machinery like excavators or bulldozers. Your old trailer has a high deck that won’t fit the low-profile equipment, and the fixed ramps are too
Gooseneck Low-bed Semi-trailer
The gooseneck low-bed semi-trailer is a specialized vehicle designed specifically for the transport of construction machinery, large-scale equipment, and heavy structural components. It derives its
Heavy-Haul Low-Bed Semi-Trailer
Our Heavy-haul low-bed semi-trailers are designed for transporting oversize/overweight cargo like construction machinery and equipment. Available in 3/4-axle configurations, with high-strength steel

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Types and Available Models

01/

Flatbed and Skeleton Semi Trailers
Configured for ISO container hauling (20ft, 40ft, 45ft) and loose breakbulk cargo.
Payload Capacity: 30 to 50 Tons
Frame Material: Q345B or T700 High-Tensile Steel
Axle Configuration: 2-Axle, 3-Axle, or 4-Axle (FUWA / BPW)
Primary Application: Port container terminal drayage and highway logistics.

02/

Lowbed and Heavy Equipment Trailers
Designed with low deck heights and heavy-duty loading ramps for moving excavators, bulldozers, transformers, and industrial machinery.
Payload Capacity: 40 to 100 Tons
Deck Height: 850 mm to 1,150 mm (loaded)
Ramp Type: Manual Spring Ramps or Hydraulic Folding Ramps
Primary Application: Mining machinery haulage, infrastructure construction, and oversized cargo transport.

03/

Sidewall and Fence Semi Trailers
Equipped with removable or drop-down side panels to secure palletized goods, agricultural products, and bagged construction materials.
Payload Capacity: 35 to 60 Tons
Sidewall Height: 600 mm to 1,200 mm
Floor Type: 3 mm Checkered Plate or 28 mm Hardwood Floor
Primary Application: Agricultural grain distribution, bagged cement, and general cargo freight.

04/

Dump and Tipper Semi Trailers
Built with rear-tipping or side-tipping box geometries for quick unloading of aggregates, sand, coal, and ore.
Payload Capacity: 30 to 60 Tons
Body Geometry: U-Shape (Half-Pipe) or Rectangular Box
Hydraulic System: Front-End Lifting Hyva Cylinder System
Primary Application: Mining quarry transport, road building aggregates, and bulk mineral haulage.

Specifications and Configurations

Parameter	40ft Flatbed Trailer	3-Axle Lowbed Trailer	U-Shape Dump Trailer
Overall Length	12,500 mm	13,000 mm	9,500 mm to 11,500 mm
Overall Width	2,500 mm	3,000 mm (with extenders)	2,550 mm
Payload Rating	40,000 kg	60,000 kg	45,000 kg
Main Beam Height	500 mm	500 mm to 550 mm	480 mm to 500 mm
Main Beam Specs	Upper Flange 14 mm, Lower 16 mm, Web 8 mm	Upper Flange 20 mm, Lower 20 mm, Web 12 mm	Upper Flange 14 mm, Lower 16 mm, Web 8 mm
Box Material	N/A	N/A	NM400 / Hardox 450 Wear-Resistant Steel
Axle Brand	BPW / FUWA / L1 13T or 16T	FUWA / BPW Heavy-Duty 16T	BPW / FUWA Heavy-Duty 16T
Suspension	Mechanical Leaf Spring or Air Suspension	Heavy-Duty Rigid or Mechanical Spring	Mechanical Leaf Spring or Air Ride
Kingpin Size	2 inch (50 mm) or 3.5 inch (90 mm) Bolt-In	3.5 inch (90 mm) Heavy-Duty Bolt-In	2 inch (50 mm) or 3.5 inch (90 mm)
Landing Gear	JOST / FUWA 28 Ton Two-Speed	JOST / FUWA 28 Ton Heavy-Duty	JOST 28 Ton Two-Speed Manual
Braking System	Dual-Line Pneumatic with WABCO ABS	Dual-Line Pneumatic with WABCO ABS	Dual-Line Pneumatic with WABCO ABS/EBS
Tires	12.00R20 or 315/80R22.5 (12 Units)	235/75R17.5 or 11.00R20 (12 Units)	12.00R20 or 385/65R22.5 Super Single

Quality Inspection and Testing

CNC Fiber Laser Cutting and Automated Arc Welding: Structural plates are precision-cut using CNC lasers. Main longitudinal beams are joined using automatic double-sided submerged arc welding (SAW) to eliminate weld seam cold joints.

Non-Destructive Weld Defect Inspection: Ultrasonic flaw detection is conducted on major load-bearing welds, including main beam flange-to-web joints, crossmember connections, and kingpin mounting plates.

Laser Axle Parallelism and Wheel Alignment Testing: Optical laser measurement tools calibrate axle parallelism within 1.5 mm tolerance across all wheel hubs, preventing irregular tire scuffing and directional pull.

Shot Blasting and Polyurethane Surface Coating: Assembled frames undergo SA 2.5 class shot blasting to strip mill scale and surface rust. Corrosion resistance is provided by a two-pack polyurethane paint system over a zinc-rich epoxy primer.

Customization and Purchasing Options

Structural and Deck Material Options

High-Strength Q345B Steel: Standard material for highway transport and general cargo freight.

T700 / Q690 High-Yield Steel: Lightweight frame construction yielding up to 1.2 tons in tare weight reduction without compromising load capacity.

NM400 / Hardox Wear Plates: High-abrasion resistance for dump trailer floors and sidewalls handling mined rock or demolition waste.

Axle and Suspension Customization

Air Suspension with Axle Lift: Automatically lifts the front axle during unladen return trips to reduce tire wear and fuel consumption.

Steering Axles: Self-steering or forced-steering axles fitted to lowbed trailers to navigate tight urban intersections and quarry bends.

Supply and Assembly Formats

Complete Built Units (CBU): Delivered fully built and road-tested for immediate deployment.

SKD / CKD Fleet Kits: Semi-Knocked-Down or Completely-Knocked-Down packaging designed to optimize shipping volume in standard 40ft High Cube containers.

Shipping, Delivery and Export

40ft High Cube Container Shipping (SKD/CKD)

Chassis tail sections or running gear assemblies are designed with bolted joints where applicable, allowing up to 3 complete flatbed trailers or skeleton chassis to fit inside a single 40ft HC container.

Roll-on/Roll-off (Ro-Ro) Shipping

Complete trailers are towed directly into ship holds, preventing exposure to deck saltwater mist during transit.

Frame Bundling for Breakbulk Delivery

Multiple flatbed or skeleton units are stacked, welded with temporary transport locks, and shipped as a unified bundle on breakbulk vessels.

Marine Preservation Coating

All exposed machined surfaces, kingpins, landing gear legs, and brake valves receive marine anti-corrosion wax coatings and protective foil wrapping prior to port delivery.

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FAQ

Q: How do you select between Q345B steel and T700 high-tensile steel for the main beam?

A: Selection depends on load profile and regional weight laws. Q345B steel provides reliable structural strength for standard off-road and heavy-haul applications at a cost-effective price point. T700 high-tensile steel features higher yield strength, allowing web and flange plate thickness to be reduced while maintaining structural integrity. This lowers total trailer tare weight, allowing higher legal payload capacities on weight-restricted highways.

Q: Can trailer dimensions and axle layouts be matched to our local transport regulations?

A: Yes. Wheelbase spacing, overall length, axle counts, kingpin position, and rear overhang are engineered to match regional transport rules, including European modular limits, North American bridge formulas, and GCC axle weight limits.

Q: What measures prevent irregular tire wear on multi-axle trailers?

A: Tire scuffing is prevented through precision factory calibration. We utilize optical laser alignment systems to verify axle parallelism and kingpin centerlines during suspension fitting. Additionally, air suspension systems maintain equal load distribution across all axles regardless of road deck variance.

Q: Which axle and brake brands are installed on export models?

A: We fit original axles from BPW, FUWA, or L1 based on regional spare parts availability in your operating market. Braking systems use dual-line pneumatic circuits paired with WABCO ABS or EBS valves to ensure reliable stopping distances and stability during emergency braking.

Q: What is the typical lead time for a fleet production order?

A: Standard production lead time is 20 to 30 calendar days following drawing sign-off and deposit receipt. Customized orders requiring specialized steering axles, hydraulic ramps, or custom CKD packing jigs require 30 to 40 calendar days.

Q: How are replacement parts supplied for international operations?

A: Consumable spare parts kits (including brake shoes, air bags, seals, lighting modules, and twist locks) can be bundled directly inside container shipments. Critical components utilize standard international part dimensions, allowing quick local sourcing through regional commercial vehicle part networks.

Request a Detailed Quote

Contact our sales engineering team for dimensioned drawings, FEA load calculations, container packing schematics, and FOB or CIF price quotes for your fleet project.
Email: admin@huaqitruck.com
Direct Line / WhatsApp: +86-15275764777

Technical Consultation: Submit your target payload weight, cargo dimensions, tractor model details, and destination port to receive a complete technical proposal within 12 hours.

Shandong Huaqi Automotive Technology Co., Ltd. is one of the most experienced semi trailer manufacturers and suppliers in China, also supports customized service with low price. Please feel free to wholesale cheap semi trailer in stock here from our factory. Contact us for free sample.