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A road roller, also known as a soil compactor, is a piece of machinery used for road construction. It comes in two main types: steel-wheeled and tire-type. As a type of construction machinery, the road roller falls under the category of road equipment and is widely employed in earthwork compaction operations for large-scale projects such as high-grade highways, railways, airport runways, dams, and stadiums. It can compact sandy, semi-cohesive, and cohesive soils, stabilized subgrades, and asphalt concrete pavement layers.
The primary function of a tower crane is to lift and transport materials, which can be done either horizontally or vertically. The materials it lifts include rebar, timber beams, concrete, steel pipes, and more. Tower cranes are among the most commonly used lifting devices on construction sites; they are also known as tower cranes and are one of the frequently encountered pieces of machinery on construction sites.
An excavator, also known as digging machinery or an earth-moving machine, is a type of construction equipment that uses a bucket to excavate materials located above or below the machine’s operating surface and then loads these materials onto transport vehicles or discharges them into stockpiles. The materials typically excavated by excavators include soil, coal, sand and gravel, as well as soil and rock that have been pre-loosened. Excavators have become one of the most important types of construction machinery used in engineering projects.
A bridge girder erecting machine is a piece of equipment used to place precast girders onto precast bridge piers. As its primary function is to lift girders, transport them to their designated positions, and then lower them into place, the bridge girder erecting machine falls under the category of cranes.