| B02 | Machinery and piping work |
| E06 | Sections, foundations, pillars, structural units and bulkheads |
| G05 | Fluid valves & other armatures |
| G06 | Purification plants & fluid treatment |
| H07 | Boilers, burners and incinerators |
| H08 | Evaporators, condensers and receivers |
| M08 | Sanitary & waste equipment |