Final answer:
Safety chains are mandatory for trailers with a Gross Trailer Weight of 3,500 pounds or more to prevent detachment incidents. Exceeding this limit poses a safety risk due to overloading. Trailers bouncing slowly are more likely to be empty as heavy loads dampen movement.
Step-by-step explanation:
When the Gross Trailer Weight is 3,500 pounds or more, certain additional safety features are mandatory. One of the key requirements is the use of safety chains. These are crucial in case the trailer becomes detached from the towing vehicle, preventing it from becoming completely free. Other features such as electric brakes, a load-leveling hitch, and weight distribution bars might also be required depending on specific state laws or the towing vehicle's capabilities and specifications.
In relation to the examples given:
- If 20 men have a total weight exceeding the safety limit of 3,500 pounds for water taxis, it indeed poses a safety concern as it surpasses the approved carrying capacity which could result in compromised stability and potential overloading.
- Observing a trailer bouncing up and down slowly on the highway usually suggests that the trailer is likely to be nearly empty. A heavily loaded trailer would generally have less bounce due to the weight dampening the movement.