1st - Concrete structures and elements |
2nd - Metallic structures |
3rd - Wooden structures |
4th - Masonry, plaster and stonework |
5th - Stucco, paintings and other coatings |
6th - Carpentry |
7th - Work on non-structural profiles |
8th - Plumbing and conduits in buildings |
9th - Installations without specific qualification |
10th - Restoration of historic-artistic real estate |