What is the minimum breaking strength required for a trailer's safety chain?

The minimum breaking strength required for a trailer's safety chain being equal to at least the gross weight of the trailer is based on safety standards aimed at preventing accidents and ensuring that trailers can be safely towed.

In the event that the trailer becomes detached from the tow vehicle, a properly rated safety chain will help to keep the trailer connected for a longer duration, reducing the likelihood of it causing a hazard on the road. By ensuring that the safety chain can withstand at least the gross weight of the trailer, it provides a sufficient margin of safety, helping to prevent catastrophic failures that could lead to loss of control while towing.

This requirement emphasizes the importance of adequate towing practices and equipment to enhance safety for all road users. The measurement reflects a thorough understanding of the forces that can act on a trailer during operation, including sudden stops and turns which increase the stress on chains. Adequately rated safety chains are essential to ensure not only the safety of the load being towed but also that of other drivers on the road.