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A B-Dolly, in the context of trucking and semitrailers, refers to a specialized type of dolly used to connect a semitrailer to a truck tractor. Here’s a breakdown of its key features and usage:
- Purpose: A B-Dolly is designed to provide additional support and stability for the rear of a semitrailer, especially in configurations where the semitrailer needs extra support due to its length or weight distribution.
- Configuration: It typically consists of a fifth wheel (similar to the one on a truck tractor) mounted on a frame with one or more axles. The axles are permanently attached to the dolly and extend to support the rear of the semitrailer.
- Usage: B-Dollies are commonly used on flatbed trailers or tank trailers where the weight distribution or the length of the semitrailer requires additional stability and maneuverability. They allow the semitrailer to be towed effectively without compromising safety or performance.
- Connection: The fifth wheel of the B-Dolly connects to the kingpin of the semitrailer, providing a secure coupling that allows the semitrailer to articulate and maneuver in conjunction with the truck tractor.
- Regulations: The use of B-Dollies is subject to regulations and standards set by transportation authorities, ensuring that they are used safely and effectively within legal limits for weight distribution and trailer configurations.
Overall, B-Dollies play a critical role in enhancing the operational capabilities of semitrailers, particularly in specialized applications where additional support and maneuverability are required.
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