Tri-Axle Drop-Frame Step-Deck Container Trailer
The Tri-Axle Drop-Frame Step-Deck Container Trailer (also known as a step-deck or drop-deck flatbed trailer) is a specialized, low-center-of-gravity commercial transport semi-trailer engineered specifically for tall ISO containers, over-height machinery, and heavy industrial freight requiring extra vertical clearance. Built with high-strength Q345B structural steel and automated submerged-arc welding, its stepped upper-to-lower deck profile lowers the overall deck height, enabling legal transport of high-cube freight without exceeding standard overhead road limits. Equipped with multi-position container twist-locks, durable 13T axles, and air or mechanical suspension, it delivers superior roll stability and versatile loading capabilities across demanding intermodal and heavy-haul logistics corridors. Fully certified under ECE, ISO9001, CCC, CE, DOT, and SGS standards.
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Product Details
Technical Specifications
Model NO. : Customized
Type : Semi-Trailer
Load Capacity : 40T/50T
Condition : New
Grade : Heavy Duty
Shape : Drop-Frame / Step-Deck Flatbed
Origin : Shandong, China
Production Capacity : Customized
Certifications : ECE, ISO9001, CCC, CE, DOT, SGS
HS Code : 8716399000
Overall Dimensions : 13500 x 2500 x 1500 mm (Step Height: 300-500mm)
Platform Dimension : Customized (Upper Deck + Lower Deck)
Wheel Base : 7500 + 1310 + 1310 mm
Tread : 1820 mm
Axle Number : 3 Axles
Axle Brand : FUWA / BPW / HuaJin
Axle Capacity : 13T
Tire Number : 12
Tire Specification : 235/75R17.5 / 11R22.5 / 12R22.5
Tire Brand : Triangle / Double Coin / Linglong / Chaoyang
Rim : 6.75-17.5 / 8.25-22.5 / 9.00-22.5
Suspension : Heavy Duty Leaf Spring / Air Suspension
Leaf Spring : 10pcs (90x13mm)
Brake System : ABS Anti-lock Braking System
ABS Brand : WABCO / Kemi / Haldex
Self-dumping : Not Self-dumping
Material : Steel (Q345B)
Main Beam Height : 500mm
Upper Plate : 14mm
Down Plate : 16mm
Middle Plate : 8mm
Welding : Automatic Submerged-Arc Welding
Platform Floor : Checkered Plate 3mm / 4mm
Landing Gear : 28T Two Speed / JOST / FUWA
King Pin : 50#(2") / 90#(3.5")
King Pin Brand : JOST / FUWA
Twist Lock : 8pcs / 12pcs Integrated Setup
Spare Tire Carrier : 2pcs
Tool Box : 1pcs
Electric System : 24V, 7 Pin Socket, LED Light
Wiring Harness : 6 Lines
Painting : Sand Blasting + Primer + Two Coats
Colour : Optional
Warranty : Main Beam 3Y / Axle 1Y
Package : Nude / Container / Ro-Ro
Delivery Time : 25-30 Working Days
Payment Terms : T/T, L/C
Key Structural & Performance Features
1. Step-Deck Profile & Low Center-of-Gravity Chassis
- Low-Profile Step-Frame Architecture: Engineered with a stepped chassis transition that significantly drops the main deck height, allowing high-cube containers and tall industrial cargo to be transported within legal height restrictions.
- Q345B High-Tensile Structural Spine: Main longitudinal beams welded via automated Submerged-Arc Welding (SAW), providing high structural stability, superior frame flex control, and heavy payload capacity.
- Versatile Container Lock Layout: Equipped with 8 to 12 strategically located twist-locks to securely carry high-cube ISO containers, standard 20ft/40ft containers, or general over-height break-bulk freight.
2. Axle, Suspension & Pneumatic Braking Systems
- Heavy-Duty 3-Axle Configuration: 3 premium commercial axles (FUWA / BPW / HuaJin brands; 13T capacity per axle) calibrated for optimal load sharing and exceptional stability on highway routes.
- Low-Profile Suspension Setup: Heavy-duty leaf spring setup (10pcs, 90x13mm) or specialized low-slung air suspension tailored for smaller diameter tires (e.g., 235/75R17.5) to further minimize deck height.
- Advanced Braking System: ABS Anti-lock Braking System (WABCO / Kemi / Haldex brands) ensuring controlled, responsive stopping performance under maximum payload conditions.
3. Operational Accessories & Logistics Setup
- Landing Gear & Kingpin: Heavy-duty 28-Ton two-speed landing gear (JOST / FUWA) and interchangeable 50#(2") or 90#(3.5") kingpin for fast, reliable tractor coupling.
- Electrical & Lighting System: Weatherproof 24V LED lighting system with 7-pin socket and 6-line wiring harness for total highway compliance and safety visibility.
- Anti-Corrosion Surface Treatment: Prepared via shot-blasting, coated with anti-rust primer, and finished with double-coated polyurethane topcoats for high weather resilience.
Commercial & Logistics Terms
- Warranty Policy: 3-Year warranty for the main structural chassis frame; 1-Year warranty for axles.
- Delivery Lead Time: 25 – 30 working days upon order confirmation.
- Packaging & Shipping: Nude packing; shipped via Container, Ro-Ro vessel, or Bulk Cargo ship.
- Payment Terms: T/T (Telegraphic Transfer), L/C (Letter of Credit).
