Construction of motorways, roads, streets, railways, runways at airfields / General construction of buildings (new works, replacement, reconstruction and restoration)
- 23.99 — Manufacturing of non-metallic mineral products, n.v.d.g.
- 08.12 — Extraction of sand, gravel, clay and kaolin
- 46.73 — Wholesale timber and building materials and sanitary equipment
- 52.21 — Supporting land transport
- 71.12 — Activities in the field of engineering, geology and geodesy, provision of technical advice in these areas
- 41.20 — Construction of residential and non-residential buildings
- 42.11 — Construction of roads and motorways