Road construction; construction of buildings, bridges, airports, water treatment plants, carparks, footpaths, pavements, driveways, kerbing, and retaining walls; installation, maintenance and repair of equipment and apparatus for use in road building; excavation and earthworks; drainage services; soil stabilization; road sealing and stripping; road paving; asphalting; construction of roads, sewers, storm water and water supply systems; road marking services; pavement sealing; pavement stripping; construction and maintenance services relating to civil engineering; soil erosion control services rendered by building contractors; construction, maintenance, installation, supervision and repair of roads, tunnels, walls, road barriers, bridges and other constructions; lease, hire and rental services for the construction and roading industry; building and construction services in the field of civil engineering in relation to infrastructure development related to roading; building and construction services in the field of geotechnical engineering namely in relation to earthquake engineering, engineering geology, excavations, foundations for industrial development, liquefaction, pavements, pilings, quarry and mining services, slope stability, and slope retention; road construction and maintenance, including the re-texturization of flushed roads and pavements; consultancy, advisory and information services relating to the foregoing.