Technical Data (Category O – Trailers)
Category O covers trailers, including cargo trailers, caravans, utility trailers, semi-trailers, and sport trailers. The COC Compliance and Ownership Certificate provides essential details about the compliance and ownership of trailers, helping facilitate their use across borders. However, it’s important to remember that this document is not a government-issued certificate.
Compliance Information
- Maximum Load Capacity: The certificate includes the maximum permissible load for the trailer, which is critical for ensuring safe and legal operation on roads.
- Gross Trailer Weight (GTW): Information about the gross weight of the trailer, including both unloaded and fully loaded weights, is included to comply with local transport regulations.
- Axle Load: The certificate specifies the maximum load per axle, which is important for assessing roadworthiness and ensuring compliance with safety standards.
- Braking System: For trailers equipped with brakes, the certificate provides details on the type of braking system used, a necessary aspect for legal compliance in many countries.
- Dimensions: The overall length, width, and height of the trailer are specified, helping to ensure that it meets the legal size limits for road usage in different regions.
- Noise Levels: While trailers themselves may not emit noise, the certificate includes any applicable noise emission data related to trailer components or equipment, if necessary for compliance in certain jurisdictions.
European Standards
The COC Compliance and Ownership Certificate for Category O trailers ensures compliance with European safety standards, including those related to load limits, braking systems, and axle weight. However, this document is not issued by a governmental body and is not a substitute for official certification required by local authorities for registration or operation.
Wheels and Tires
The certificate includes details on wheel size and tire specifications, ensuring that the trailer meets the required standards for road safety and technical compliance.


