| SECTION F : CONSTRUCTION | 
| Division 42 : Civil engineering | 
| Group | Class | Sub-class | Description | 
| 421 |  |  | Construction roads and railways | 
|  | 4210 |  | Construction roads and railways | 
|  |  |  | This class excludes: | 
|  |  |  | - installation of street lighting and electrical signals, see 4321 | 
|  |  |  | - architectural and engineering activities, see 7110 | 
|  |  |  | -  project management activities related to civil engineering works, see 7110 | 
|  |  | 42101 | Construction and maintenance of motorways, streets, roads, other vehicular and pedestrian ways, highways, bridges, tunnels and subways | 
|  |  | 42102 | Construction and maintenance of railways and rail-bridges | 
|  |  | 42103 | Construction and maintenance of airfield runways | 
| 422 |  |  | Construction of utility projects | 
|  | 4220 |  | Construction of utility projects | 
|  |  |  | This class excludes: | 
|  |  |  | - project management activities related to civil engineering works, see 7110 | 
|  |  | 42201 | Construction and maintenance of power plants | 
|  |  | 42202 | Construction/erection and maintenance of power, telecommunication and transmission lines | 
|  |  | 42203 | Construction of long distance pipelines or urban pipelines | 
|  |  | 42204 | Construction and maintenance of water main and line connection, water reservoirs including irrigation system (canal) | 
|  |  | 42205 | Construction and repair of sewer systems including sewage disposal plants and pumping stations | 
|  |  | 42206 | Water well drilling | 
|  |  | 42209 | Construction of utility projects n.e.c. | 
| 429 |  |  | Construction of other civil engineering projects | 
|  | 4290 |  | Construction of other civil engineering projects | 
|  |  |  | This class excludes: | 
|  |  |  | -  project management activities related to civil engineering works, see 7110 | 
|  |  | 42901 | Construction and maintenance of industrial facilities such as refineries chemical plants etc. | 
|  |  | 42902 | Construction of waterways, harbours and river works, dredging of waterways | 
|  |  | 42903 | Construction of dams etc. | 
|  |  | 42904 | Construction of outdoor sports facilities | 
|  |  | 42909 | Other civil engineering projects n.e.c. |