The total weight of a powered unit, the trailer, and the cargo is referred to as "Gross Combination Weight" (GCW). This term reflects the combined weight of the vehicle itself (the powered unit), the trailer it is towing, and any load or cargo carried within that trailer. Understanding GCW is critical for commercial drivers because it helps in determining the limits of the vehicle and ensuring compliance with weight restrictions on roads.
The reason it is essential to measure GCW is that it affects vehicle handling, brake performance, and the overall safety of operation. Knowing the GCW helps drivers make informed decisions regarding loading practices and compliance with legal regulations regarding transportation.
The other terms have specific definitions that relate to different aspects of vehicle weight. "Gross Vehicle Weight" pertains solely to the total weight of the vehicle and its cargo without the trailer; "Gross Axle Weight" refers to the total weight carried on a specific axle; and "Net Vehicle Weight" indicates the weight of the vehicle without any cargo. These definitions highlight the importance of understanding the distinctions between different weight measurements in commercial driving.