Heavy Trailer Class (HVNL s.5)
1 Central Axle Group | Rigid Drawbar | Licence: LR/MR/HR (≤9t) or HC (>9t)
Pig Trailer
A trailer with a single central axle group and a rigid drawbar connected directly to the towing vehicle.
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1. Basic & Technical Info
2. Licensing & Conditions
3. Enforcement Options
4. Images & Diagrams
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1. Basic Information & Technical Specifications
- Mass Limits: Tandem axle group 16.5t GML; Tri-axle group strictly capped at 18.0 tonnes GML (denied HML).
- Safety Chains: Mandatory heavy-duty safety chains required due to rigid drawbar vertical download.
2. Licensing Requirements & Conditions
- Licence Class: Covered by towing rigid truck class if ≤9.0t ATM; requires HC if plated >9.0t ATM.
3. Enforcement Options & Roadside Focus
- Dynamic Sway & See-Saw Physics: Check load distribution—weight behind central axle unloads the truck's drive wheels and causes high-speed sway.
4. Reference Images & Inspection Points
Tri-Axle Pig Trailer
Central tri-axle group capped at 18.0t GML with rigid drawbar safety chains.