| 1st Category – Buildings and built heritage |
| 1st – Concrete structures and elements |
5 |
| 2nd – Metallic structures |
3 |
| 3rd – Wooden structures |
4 |
| 4th – Masonry, plaster and masonry laying |
5 |
| 5th – Stucco, painting and other coatings |
2 |
| 6th – Carpentry |
4 |
| 7th – Work on non-structural profiles |
1 |
| 8th – Pipes and ducts in buildings |
1 |
| 9th – Installations without specific qualification |
1 |
| 2nd Category – Roads, urbanization works and other infrastructures |
| 1st – Roadways and aerodromes |
3 |
| 3rd – Concrete bridges and viaducts |
2 |
| 5th – Current works of art |
1 |
| 6th – Basic sanitation |
3 |
| 8th – Pavements |
2 |
| 9th – Landscaping |
1 |
| 10th – Sports and leisure infrastructures |
2 |
| 11th – Non-electrical signaling and protection and safety devices |
1 |
| 3rd Category – Hydraulic works |
| 2nd – Harbor-building projects |
5 |
| 4th – Dams and dikes |
5 |
| 5th Category – Other works |
| 1st – Demolitions |
1 |
| 2nd – Earthmoving |
1 |
| 7th – Drains and slope treatment |
2 |
| 8th – Reinforced concrete structures |
3 |
| 9th – Repairs and surface treatments in metallic structures |
1 |
| 10th – Formwork |
5 |
| 11th – Waterproofing and insulation |
1 |
| 12th – Scaffolding and other provisional structures |
2 |
