Name: Container Semi-Trailer
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Container Semi-Trailer

A box trailer is a transport vehicle that is modified or manufactured separately on the chassis of a box truck, and is mainly used to transport goods. The compartment is usually closed to form a closed compartment to protect the goods from the outside environment.

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Overview

A container semi-trailer is a specialized unpowered vehicle designed for transporting ISO standard shipping containers. Equipped with twist locks at the four corners of the loading platform, it securely fastens containers during transport. Available in two main types: skeleton type (no platform deck, lightweight) and flatbed type (with platform deck, can carry general cargo). Suitable for 20ft, 40ft, and 45ft ISO containers, with payload capacity up to 50 tons.

Key Features

Feature	Description
ISO Container Compatibility	Supports 20/40/45ft containers; extendable chassis handles multiple sizes
Twist Lock System	4-14 twist locks for quick and secure container fastening
High-Strength Steel Frame	Q345B/T700 steel, 500mm main beam height for high load capacity
Multiple Axle Options	2-axle / 3-axle / 4-axle; 3-axle standard with 13 tons per axle
Air Suspension Option	Height adjustable, improved cargo protection, easy dock alignment
Lightweight Design	Tare weight as low as 3,780kg; increases payload, reduces fuel consumption
Lift Axle Option	Lifts when empty, reduces tire wear and fuel consumption
Corrosion Protection	Sandblasting + primer + polyurethane paint; hot-dip galvanizing optional

Specifications

Parameter	40ft Skeleton	40ft Flatbed	45ft Lightweight
Dimensions (L×W×H)	12,500×2,500×1,550mm	12,500×2,500×1,550mm	13,950×2,550×1,600mm
Tare Weight	4,300-6,920kg	7,500-8,000kg	3,780-4,720kg
Payload Capacity	31-40 tons	32-50 tons	35-50 tons
Axles	3 axles	3 axles	3 axles
Suspension	Leaf spring / Air	Leaf spring	Air suspension
Tires	12R22.5 (12 tires) or 385/65R22.5 (6 tires)	12R22.5	425/65R22.5 super single
Twist Locks	4-12 pcs	12 pcs	4 pcs
Main Beam	500mm I-beam, 14/16mm flanges	500mm I-beam	Lightweight high-strength

Type Comparison

Type	Features	Best Application
Skeleton	Lightest tare weight, maximum payload	General container transport, port operations
Flatbed	Carries both containers and general cargo	Mixed cargo, construction materials
Extendable	Adjustable 20-45ft, one chassis for all sizes	Multi-size container operations, fleet flexibility
Lightweight	Tare weight ≤4,000kg, super single tires	Maximum payload, electric tractor integration

Applications

Application	Recommended Model
Port & Dock Operations	20/40ft Skeleton Chassis
Long-Haul Highway Transport	Lightweight chassis, 45ft extendable
Cold Chain Logistics	Chassis with generator set compatibility
Mixed Cargo Operations	Flatbed platform trailer
Weight-Restricted Routes	2-axle configuration

Buying Guide

1. Select by Application

Requirement	Recommendation
General container transport	40ft skeleton chassis, 3 axles
Maximum flexibility	Extendable chassis (20-45ft)
Maximum payload / fuel economy	Lightweight chassis (tare ≤4,000kg)
Mixed cargo	Flatbed platform with rope tensioners

2. Select by Container Size

Container Size	Recommended Chassis
20ft only	20ft fixed chassis
40ft only	40ft fixed chassis
20ft & 40ft mixed	40ft multi-position chassis
40ft & 45ft mixed	45ft extendable chassis
All sizes (20-45ft)	Full extendable chassis

3. Axle & Suspension

Configuration	Best For
3 axles + leaf spring	Standard operations, cost-sensitive
3 axles + air suspension	Cold chain, sensitive cargo, dock operations
2 axles	Weight-restricted routes, urban transport

4. Tire Selection

Configuration	Advantages
Dual tires (12R22.5, 12 tires)	Good stability, widely available
Super single (385/65R22.5, 6 tires)	Lighter weight, lower rolling resistance, better fuel economy

5. Used Vehicle Inspection Checklist

Frame cracks (especially around twist lock mounts and suspension connections)
Twist lock operation (smooth rotation, secure locking)
Tire wear uniformity (indicates axle alignment)
Brake system and air lines condition
Landing gear operation (smooth lifting)
Corrosion condition

Delivery & Certification

Item	Details
Lead Time	Standard: 15-25 business days; Export orders: 20-35 business days
Shipping Method	RoRo, container shipping, bulk vessel
MOQ	1 unit
Warranty	Structure: 12 months; Components: 6 months
Certifications	CCC, ISO; Assistance available for ECE, GCC, SONCAP, etc.

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