Typically, vehicles through GVWR Class 4 (14,001 to 16,000 pounds) are assigned a maximum trailer weight rating by chassis manufacturers. These statements have the potential to create critical problems for fleet operations.ĭesign criteria on capacity limits is key to understanding conventional towing and truck load capability. Are you using the correct load distribution on the trailer to ensure safe towing characteristics?Ĭommonly held towing beliefs include the notion that if it moves, it’s not overloaded and if the front wheels are on the ground, it’s good to go.Are you using the right type of trailer with the right type of connection to the towing truck?.Are you exceeding truck gross vehicle weight rating (GVWR) and/or gross axle weight ratings (GAWRs), including the effect of trailer tongue weight as part of the weight analyses?.Four central issues can impact occasional trailer towing: In contrast, with vocational drivers who only occasionally use trailers-and often different types with varying loads and configurations-there are more opportunities for mistakes.Ĭouplings for commercial motor vehicles are regulated under Federal Motor Carrier Safety Regulations (FMCSR) Part 393.70, and coupler performance requirements are covered under various SAE Standards, such as J684, J847 and J2638. For instance, Class 8 drivers in over-the-road and less-than-truckload applications tend to experience fewer loading issues specific to the towing vehicle simply because their natural operating state is with a trailer. Trailering behind vocational trucks is often taken for granted.
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