Building construction services; Building demolition; Building reinforcing; Construction and construction management of tunnels and underground structures; Construction and installation of masonry walls and structures; Construction of industrial sites such as factories, production plants, recreational facilities, utility buildings, hospitals, power stations, refineries, offshore installations, wind turbines, bridges, industrial facilities and towers buildings; Construction of industrial buildings; Erecting of commercial centres, housing areas and manufacturing plants; General construction contracting; Installation and maintenance of solar energy based power plants; Installation, maintenance and repair of the structural steel framework of pre-engineered metal buildings single and multi-story buildings, stadiums, arenas, hospitals, towers, wind turbines, and bridges; Installation, maintenance and repair of mechanical piping systems; Installation, maintenance and repair of pipe carrying fuel, chemicals, water, steam and air in heating, cooling, lubricating and various other process piping systems; Machinery installation, maintenance and repair; Metal alloy coating services; Pipe laying services; Providing technical support, namely, technical advice concerning the installation, repair and maintenance of electric or electronic apparatus, equipment and devices used for automated or partly automated industrial operations; Repair of metalworking machines and apparatus; Repair or maintenance of construction machines and apparatus; Repairing corrosive or leaking pipes through pipelining, namely, coating the inside of the pipe with a durable safe epoxy; Self-perform construction skilled trades, namely, concrete work, carpentry and selective demolition services; Steel erectors; Steel structure construction works