Construction,engineering surveying, expertise,architectural design,engineering system design,design projects,preparation and analysis of cost estimates,Foundation and ground work,the device of walls and ceilings,roofing work,fabrication/installation of fencing and gates,construction of roads and road surfaces,the complex structural works,welding works,Assembly works,exterior finish,interior finish.insulation work,processing of building structures,fabrication/installation stairways,landscape and garden work,complex finishing works,water supply,Sewerage,plumbing and equipment,heating,ventilation, air-conditioning,gas supply,energy supply,maintenance and operation of buildings and highways,rental of tools, equipment and machinery and services construction equipment and tools,demolition,utility work,cleaning and removal of debris