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A grader is a construction machine with a long
blade used to create a flat
surface, to finish the “rough grading” performed by scrapers and bulldozers.
Graders are commonly used in the construction and maintenance of roads or
in the preparation of the base for a wide flat surface for the asphalt to be placed
on or to finish grade prior to the construction of large buildings. A more recent
innovation is the outfitting of graders with GPS technology.
Excavators tracked or wheeled are heavy construction machines the parts
of which are boom, sticks, bucket and cab on a rotating platform (known as the
“house”). Excavators
are also called diggers, mechanical shovels, or 360-de-
gree excavators (sometimes abbreviated simply to 360).
Terex TS-14b scraper in Hudson, Ohio
A bulldozer, Hainan, China
A modern road grader