Width Extendable Drop Deck Semi-Trailer
The Width Extendable Drop Deck Semi-Trailer is an advanced heavy-duty lowbed semi-trailer engineered specifically for hauling oversized, exceptionally wide industrial cargo such as large excavators, bulldozers, crawler cranes, wide agricultural machinery, and bulky industrial modules. Built with a load capacity ranging from 30 to 150+ tons, it is constructed using Q345B/Q550/Q700/T700 high-tensile steel and automated submerged-arc welding. Featuring a mechanical or hydraulic width-extension mechanism that expands the platform width (typically adding 250–500 mm per side up to 3,200–3,500 mm total width), combined with an ultra-low sunken deck (700–1,100 mm height), it provides exceptional lateral adaptability, prevents cargo overhang hazards, lowers the center of gravity, and ensures strict highway bridge clearance and transport stability compliance. Fully certified under ECE, ISO9001, CCC, CE, DOT, and SGS standards.
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Product Details
Technical Specifications Matrix
| Specification Category | Parameter Details |
| Product Name | Width Extendable Drop Deck Semi-Trailer / Expandable Width Lowboy Trailer |
| Condition | 100% Brand New |
| Rated Load Capacity | 30 – 150+ Tons |
| Overall Dimensions (L×W×H) | 12,500–18,000 × 2,500–3,000 (Extendable up to 3,500) × 1,500–3,500 mm |
| Low Deck Length | 7,500 – 10,500 mm |
| Loading Deck Height | 700 – 1,100 mm |
| HS Code | 8716391000 |
| International Certifications | ECE, ISO9001, CCC, CE, DOT, SGS |
Key Structural & Performance Features
1. Mechanical / Hydraulic Lateral Width-Extension System
- Retractable Outrigger Beams: Features heavy-duty sliding extension box beams embedded into the crossmembers, allowing the trailer deck width to expand seamlessly on both sides.
- High-Tensile Steel Structure: Fabricated with Q345B, Q550, Q700, or T700 steel plates, engineered to resist severe lateral bending moments and transverse torsional forces when fully extended.
- Automated SAW Welding: Robotic Submerged-Arc Welding (SAW) combined with $CO_2$ gas-shielded welding guarantees exceptional structural durability across sliding extension joints.
- Low-Profile Deck Design: Sunken loading platform height ranging from 700 mm to 1,100 mm, keeping the center of gravity exceptionally low for stability during transport of wide, heavy loads.
2. Axle, Suspension & Braking Systems
- Axle Configurations: 2 to 6 axles (FUWA, BPW, Huajin, or equivalent premium brands; 13T / 16T / 20T / 25T capacity per axle).
- Tire & Rim Setup: 8 to 24 heavy-duty tires paired with 6.75-17.5 or 9.00-22.5 high-load steel rims.
- Suspension Options: Heavy-duty multi-leaf spring suspension or shock-absorbing air/hydraulic suspension system.
- Braking System: Dual-line ABS anti-lock braking system (WABCO, Kemi, Haldex, or equivalent) for reliable stopping safety under wide heavy payloads.
3. Cargo Securing & Width-Extension Logistics Setup
- Positive Locking Pin System: Multi-position heavy-duty locking pins secure the extended outriggers firmly in place during transit to prevent shifting under vibration.
- Extension Support Planks: Includes drop-in hardwood timber boards or steel infill plates to cover the widened side gaps, creating a solid expanded working floor.
- Cargo Securing Systems: GR120 heavy-duty lashing chains, D-ring tie-down anchor points on extension brackets, and heavy-duty wheel chocks to lock wide cargo securely.
- Standard Accessories: 28-Ton two-speed landing gear (JOST / FUWA), 50# (2") or 90# (3.5") interchangeable kingpins, 24V 7-pin LED lighting system with width warning flags/lights, 1–2 spare tire carriers, and a lockable tool box.
Commercial & Logistics Terms
- Warranty Policy: 3-Year warranty for the main beam and extension mechanisms; 1-Year warranty for axles.
- Delivery Lead Time: 25 – 35 working days upon order confirmation.
- Packaging & Shipping: Nude packing; shipped via Ro-Ro vessel, Bulk Cargo ship, or Container.
- Payment Terms: T/T (Telegraphic Transfer), L/C (Letter of Credit).
