Tractor trailers come in many shapes and sizes. Depending on what they are designed for, they can be made from different materials, come in different lengths and possess different loading and unloading mechanisms. For instance, flat bed trailers are laterally extensive trailers designed for carrying machinery or materials, while hydraulic self-unloading trailers harness a hydraulic system to enable easy unloading of cargo such as sand or gravel.
Standard flatbed trailers designed for general material and equipment carriage have an average length of 48 feet, while older beds measure around 45 feet. These days, more tractor trailer manufacturers are offering 53 foot aluminum spread axle flatbed trailers, which are both lighter and able to haul more weight.
Hydraulic Self-Unloading Trailers
Hydraulic self-unloading trailers for tractors tend to be smaller than flatbed trailers. For instance, the TR1000 manufactured in China has a length of 2,000 mm, a width of 2,800 mm and a height of 1,000 mm. The larger TR3500 is 4,650 mm long, 1,825 wide and 1,335 high.
Max Lifting Angle
The maximum lifting angle of a hydraulic self-unloading trailer is the maximum angle which the trailer can be raised by the hydraulics, enabling material contained within the trailer to be deposited. The TR1000 and TR3500 hydraulic self-unloading trailers both have a maximum lifting angle of 40 degrees.
Max Loading Weight
The maximum loading weight of a hydraulic self-loading tractor trailer is the maximum weight which can be loaded onto the trailer while still enabling the hydraulics to achieve the maximum lifting angle. The maximum loading weight of the TR1000 is 1,000 kg, while the TR3500 has a maximum loading weight of 3,500 kg. The maximum loading weight of a flatbed trailer is generally around 46,000 pounds. The maximum load depends on how the weight is distributed and the load type. The legal limit for a flatbed trailer, everything included, is 80,000 pounds.
The power required to tow a tractor trailer depends on the size of the trailer. For instance, the TR1000 hydraulic self-unloading trailer requires a tractor with a power output of 18-25 hp to tow it. The larger TR3500 trailer requires a tractor of between 30 hp and 50 hp to tow it.
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