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974 |
Excavators | Workers in this unit group excavate, grade, level and compact earth and similar materials, mix concrete and lay road surfaces of asphalt and concrete. They may work exclusively with hand tools. Otherwise, their functions include: operating an excavating machine mounted on wheels or crawler tracks, equipped with movable shovel, grab-bucket or dragline bucket, to excavate and move earth, rock, sand, gravel and similar material; operating a machine for digging trenches for sewer, drainage, water, oils, gas and similar pipelines; operating a machine equipped with concave steel blade to move, distribute and level earth; operating dredging equipment to remove sand, gravel and mud from bottom of a body of water; operating a machine equipped with compressed air, steam or drop-hammer to drive wooden, concrete or steel piles into dry ground or bottom of a body of water; operating a machine equipped with scraper or scoop to level construction sites, roadways, airport runways and other ground; operating power roller to compact and smooth layers of material in making roads, pavements and similar work; operating a machine which spreads and smooths concrete to construct concrete roadways; operating a machine to spread bituminous or tar preparations on roads; operating a transportable machine to mix sand, gravel, cement and water to make concrete at construction site; operating central concrete-mixing plant; performing related tasks. |
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