41.00.A - Construction of residential buildings
25.53.Z - Machining of metals
41.00.B - Construction of non-residential buildings
42.21.Z - Construction of utility projects for fluids
42.99.Z - Construction of other civil engineering projects n.e.c.
43.12.Z - Site preparation
43.22.Z - Plumbing, heat and air-conditioning installation
43.23.Z - Installation of insulation
43.35.Z - Other building completion and finishing
43.41.Z - Roofing activities
43.42.Z - Other specialised construction activities in construction of buildings
43.50.Z - Specialised construction activities in civil engineering
43.91.Z - Masonry and bricklaying activities
43.99.Z - Other specialised construction activities n.e.c.
68.12.C - Execution of other construction projects
81.22.B - Other building and industrial facility cleaning not classified elsewhere