42.22.Z - Works related to construction of telecommunications and electricity lines
41.20.Z - Building works related to erection of residential and non-residential buildings
42.11.Z - Works related to construction of roads and motorways
42.13.Z - Works related to construction of bridges and tunnels
42.21.Z - Works related to construction of transmission pipelines and distribution networks
42.91.Z - Works related to construction of water projects
43.11.Z - Demolition
43.12.Z - Site preparation
43.21.Z - Electrical installation
43.22.Z - Plumbing, heat and air-conditioning installation
43.29.Z - Other construction installation
43.39.Z - Other building completion and finishing
43.99.Z - Other specialised construction activities not elsewhere classified
70.22.Z - Business and other management consultancy activities
81.21.Z - General cleaning of buildings
