42.21.Z - Works related to construction of transmission pipelines and distribution networks
36.00.Z - Water collection, treatment and supply
37.00.Z - Sewage disposal and treatment
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
42.12.Z - Works related to construction of railways and underground railways
42.91.Z - Works related to construction of water projects
42.99.Z - Works related to construction of other civil engineering projects not elsewhere classified
43.11.Z - Demolition
43.12.Z - Site preparation
43.22.Z - Plumbing, heat and air-conditioning installation
43.99.Z - Other specialised construction activities not elsewhere classified
71.12.Z - Engineering activities and related technical consultancy
71.20.B - Other technical testing and analysis
