What is the maximum gross weight for trailers and semitrailers that can use surge or inertia brake systems?

The maximum gross weight for trailers and semitrailers that can utilize surge or inertia brake systems is indeed 15,000 pounds. This limit is set to ensure that the brake system can effectively manage the stopping power needed for trailers or semitrailers of this weight. Surge and inertia brake systems are designed to operate effectively within this weight range, where the dynamics of stopping and control can be safely managed without the risks that heavier loads could pose. When trailers exceed this weight limit, more complex brake systems that involve electric or hydraulic mechanisms are typically required to ensure safety and compliance with regulations. Understanding these specifications helps ensure that vehicles are operated within safe weight classifications based on their braking systems.