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Motor graderA grader is a heavy construction machine used to create a flat surface with a long blade. It is generally referred to as a blade, a road grader, a maintainer, or a motor grader. There are often three axles, with the cab and engine positioned above the rear axles at one end of the machine and a tertiary axle at the front end of the machine, with the blade located in between. In certain countries graders are fitted with a second blade equipped with a second blade that is placed in front of the front axle. Sometimes in the construction world the grader is referred to as the blade.
The grader's purpose in civil engineering is to final-grade the prior rough grading that was done by heavy construction machines such as bulldozers or scrapers.
Graders have the capacity to create sloped surfaces to give grade and cross slope to roads and highways. Certain countries use graders to create drainage ditches with a shallow V shaped cross section on the sides of highways.
Graders are typically used in the construction and upkeep of gravel and dirt roads. When paved roads are constructed graders are used to prepare the base course to create a wide flat surface for the asphalt to be laid. Graders are also used to set the pads for the native soil foundation to do the finalized grade prior to the construction of large buildings.
In some parts of the world such as Canada, Northern Europe and places in the United States, graders can even often be used in residential and municipal snow removal. In areas of grasslands and plains of Australia and Africa, graders are frequently a key component to make dirt tracks. graders are sufficient in the absence of rocks and trees because bulldozers are not required for heavy pushing, especially on large farms, ranches, and plantations.