List of SOA categories and further details
The list of SOA categories is set out in Annex A of (Italian) Presidential Decree 207/2010 showing the types and scopes of application, allowing the identification of work categories.
General categories
List of categories
Concerns the construction, maintenance or renovation of specific building works required to carry out any human activity, direct or indirect, complete with the necessary facilities, electromechanical, electrical, telephone and electronic installations and finishes of all kinds, and any related, complementary and accessory works. Includes but is not limited to residences, prisons, schools, barracks, offices, theatres, stadiums, industrial buildings, car parks, railway and underground stations, airport buildings and any special reinforced concrete structures, whether plain or pre-stressed, cast on site such as thin vaults, domes, water towers, silos and tall buildings with particularly complex structures and particular characteristics.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the execution of a coordinated set of specialised works to recover, preserve, consolidate, transform, restore, renovate and maintain buildings of historic interest subject to protection under the provisions on cultural and environmental heritage. Also concerns the installation in buildings of electromechanical, electrical, telephone and electronic systems and finishes of all kinds, and any related, complementary and accessory works.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of network interventions to enable transportation by road, rail and air, whatever their level of importance, complete with all related complementary or accessory works, including those specific to a limited area, of the relevant railway infrastructure, as well as all automatic, electromechanical, electrical, telephone, electronic and electric traction systems necessary to provide a good service to the user in terms of use, information, safety and assistance. Includes but is not limited to roads, whatever their level of importance, motorways, dual carriageways, including works specific to a limited area such as special paving, artificial tunnels, ground-level or elevated junctions, ground-level car parks, slope support works, embankments, railways of national and local interest, underground railways, funiculars and tramways of any technical nature, runways for aircraft take-off and heliport service aprons, stations, paving made with special, natural or artificial materials, as well as bridges, even with complex technical characteristics, in iron, simple or pre-stressed reinforced concrete, prefabricated or cast on site.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation, using special technical means, of underground works necessary to enable transportation by road and rail, whatever their level of importance, complete with all related complementary or accessory works, whether specific to a limited area or networked, such as access roads of any level of importance, ground-level or elevated junctions, ground-level car parks, slope support works and all electromechanical, electrical, telephone and electronic installations and railway construction needed to provide a good service to users in terms of use, information, safety and assistance. Includes but is not limited to natural galleries, tunnels and underground passageways.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of interventions specific to a limited area, necessary for the collection of water to be carried out for any reason, located on watercourses and inland basins, complete with all the electromechanical, mechanical, electrical, telephone and electronic installations necessary for the efficiency and effectiveness of the interventions as well as the works or network works serving them. Includes dams made of any type of material.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of network interventions necessary to implement the “integrated water service”, i.e. to transport aeriform or liquid fluids to points of use, complete with all related complementary or accessory works, including those of a specific nature, and all electromechanical, mechanical, electrical, telephone and electronic systems necessary to provide a good service to the user in terms of use, operation, information, safety and assistance in normal operation. Includes but is not limited to water collection works, water purification plants, aqueducts, water towers, pumping stations, underground or elevated reservoirs, distribution network to the end user, equipped tunnels, supply and laying of pipelines, sewers in any material, wastewater treatment before entering the natural water cycle, gas pipelines and oil pipelines.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of interventions specific to a limited area, however carried out, in fresh or salt water, which constitute terminals for water transportation, or territorial fresh and salt water defence works, complete with related complementary or accessory works, including those specific to a limited area, and all electromechanical, electrical, telephone and electronic systems necessary to provide a good service to the user in terms of use, operation, information, safety and assistance. Includes but is not limited to ports, docks, quays, groynes, platforms, jetties, coastal defences, reefs, submarine pipelines, outlet pipes, as well as dredging works in open seas or basins and protection against erosion caused by fresh or salt water.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction and maintenance or renovation of works, both specific to a limited area and networked, however carried out, necessary for the arrangement of natural or artificial watercourses as well as for territorial protection from such watercourses, complete with all related complementary or accessory works, and all necessary electromechanical, electrical, telephone and electronic systems. Includes but is not limited to navigable canals, detention basins, estuary settlements, consolidation of river and stream bed structures, embankments of all types, hydraulic regulation and arrangement of surface waters, diaphragm embankments, barrages and slope stabilisation works.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of works limited to a specific area, necessary for the production of electricity, complete with all related complementary or accessory building work, local or networked, as well as all electromechanical, electrical, telephone and electronic installations necessary in terms of operation, information, safety and assistance. Includes hydroelectric power stations or those powered by any type of fuel.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of electrical installations necessary for the distribution at high and medium voltage and for the transformation and distribution at low voltage to the final user of electricity, complete with any related complementary or accessory building work, local or networked, and the construction, maintenance and renovation of public lighting installations, to be carried out outside buildings. Includes but is not limited to transformer stations and substations, pylons necessary for the transport and distribution of any voltage, the supply and laying of electrical cables for any number of line phases on pylons or underground, the supply and laying of equipped channels and voltage cables, and public lighting installations on ports, viaducts, tunnels, roads, motorways and parking areas.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns, within the limits specified in Article 79, paragraph 16, the supply, installation, management and maintenance of a set of coordinated and functionally interconnected technological systems that cannot be executed separately, as referred to in the specialised works categories identified by the acronyms OS 3, OS 28 and OS 30.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the execution of local or networking works necessary for carrying out land reclamation and environmental protection activities. Includes but is not limited to landfills, geomembrane capping to protect aquifers, remediation of hazardous materials, detection and remote sensing facilities for environmental monitoring for any changes to the equilibrium established by current legislation, as well as facilities required for the normal operation of works and to provide a good service to the user in terms of both information and safety.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of works or works limited to a specific area, and of works or diffuse works, necessary for territorial defence and the restoration of compatibility between “sustainable development” and the ecosystem, including all works necessary for botanical and zoological activities. Includes but is not limited to natural, botanical and faunal recovery processes, conservation and recovery of soil used for quarries, peatlands and hydrographic basins, elimination of hydrogeological instability through planting, works necessary for slope stability, reforestation, agricultural works and works for the revegetation of road and railway embankments, quarries and landfills.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
* Subject to the provisions of (Italian) Ministerial Decree 154/2017
Specialised categories
List of categories
Concerns the excavation, restoration and modification of volumes of earth, carried out by any means and whatever the nature of the soil to be excavated or restored: vegetation, clay, sand, gravel, rock.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the direct restoration and ordinary and extraordinary maintenance of decorated surfaces of immovable cultural heritage property, stone artefacts, wall paintings, paintings on canvas, paintings on wood or other material supports, stuccoes, mosaics, painted and unpainted plasterwork, polymateric artefacts, polychrome and non-polychrome wooden artefacts, bone, ivory, wax, ceramic and glass artefacts, metal and alloy artefacts, materials and artefacts made of natural and artificial fibres, leather and hide artefacts, musical instruments, scientific and technical instruments and tools.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the direct restoration and ordinary and extraordinary maintenance of paper and parchment artefacts, photographic material and digital media.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the supply, installation and maintenance or renovation of water and sanitary facilities, kitchens, laundries, gas and fire-fighting installations, whatever their level of importance, complete with all related complementary or accessory building work, to be carried out in general works that have already been built or are under construction.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation and maintenance or renovation of conveyor systems, lifts, escalators, lifting and transport equipment complete with all related complementary or accessory building work, to be carried out in general works that have already been built or are under construction.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the supply, installation and maintenance or renovation of pneumatic systems and intrusion detection systems, complete with all related complementary or accessory building work, to be carried out in general works that have already been built or are under construction.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation and maintenance and renovation of carpentry and wood joinery, interior and exterior fixtures, interior and exterior cladding, flooring of all types and materials, and other items made of metal, wood, plastic, glass and similar materials.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of walls and partitions of all kinds, including plastering, skimming, painting, etc., as well as the supply, installation and maintenance or renovation of general works such as thermal and acoustic insulation, false ceilings and fire barriers.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation and renovation of waterproofing works with any material and similar works.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation and systematic maintenance or renovation of automatic systems for traffic lighting and safety on roads, railways, underground railways or tramways, including information gathering and processing.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation, maintenance or renovation as well as the operation of non-illuminated, vertical, horizontal and complementary road signs.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation and maintenance or renovation of structural equipment, such as expansion joints, support devices, and seismic devices for road and railway bridges and viaducts.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the supply, installation and maintenance or renovation of equipment such as barriers, impact attenuators and fences, etc., for the containment and safety of road traffic flow.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the supply, installation and maintenance or renovation of rockfall barriers and similar devices designed to contain and protect against falling rocks and avalanches, including works using alpine techniques.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the production in industrial plants and on-site assembly of prefabricated structures in normal or prestressed reinforced concrete.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the construction and ordinary and extraordinary maintenance of plants for the thermo destruction of waste and related systems for the treatment of fumes and material recovery, including machinery for pre-sorting, composting and the production of refuse-derived fuel, complete with any related complementary or accessory, building work, local or networked.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the cleaning of any kind of water with special technical means and the transport of waste material to locations authorised by law.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, maintenance or renovation of electrical installations and equipment serving any power plant.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation and maintenance or renovation of external telephone lines and high-frequency telecommunications systems, whatever their level of importance, complete with all related complementary or accessory building work, to be carried out, separately from the execution of other systems, in general works that have already been built or are under construction.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the in-plant production and on-site assembly of steel structures.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the in-plant production and on-site assembly of curtain walls consisting of metal frames and modular elements made of glass or other materials.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the supply, installation and maintenance or renovation of switching equipment for public or private, local or long-distance telecommunications networks for telephony, telex, data and video on copper cables, fibre optic cables, radio media, telephone, radio and television satellites, and data transmission networks, etc., whatever their level of importance, complete with all related complementary or accessory building work, to be carried out, separately from the execution of other installations, in general works that have already been completed or are under construction.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the execution of special topographical surveys requiring equipment and specific business organisation.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the execution of geognostic surveys and subsoil exploration using special equipment, also for environmental purposes, including the taking of soil or rock samples and on-site testing.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction of works intended to transfer the loads of structures resting on ground that is unsuitable for load-bearing, works intended to give the ground characteristics of resistance and non-deformability in order to make the setting of structures stable and to prevent geological instability, and works to make existing and functioning structures earthquake-proof. Includes but is not limited to the execution of piles of any kind, underpinning, special piles and retaining walls, anchorages, works to restore the stability of structures, wells, works to ensure the stability of slopes, and special works to drain, waterproof and consolidate land.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the construction, maintenance or renovation of water purification and wastewater treatment plants, including biogas recovery and the production of electricity, complete with all related complementary or accessory building work, local or networked.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the dismantling of industrial plants and the complete demolition of buildings with special equipment or the use of explosives, the cutting of reinforced concrete structures and demolitions in general, including the collection of waste materials, their separation and possible recycling in the components industry.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, installation and maintenance of elements that are not technological systems and which are necessary for a better use of the city, as well as the construction and maintenance of urban green areas. Includes but is not limited to sports fields, playgrounds, landscaping, equipped green areas and fencing.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns archaeological excavations and closely related activities.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the construction, maintenance or renovation of pavements made of special natural or artificial materials, as they are subjected to considerable loads and stresses such as airport runways.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
Elenco categorie
Concerns the supply, installation and systematic maintenance or renovation of electric traction equipment for any railway, underground railway or tramway line. Includes but is not limited to transformer stations and substations, pylons necessary for the transport and distribution of voltage, the supply and laying of electrical cables for any number of line phases on pylons or underground, the supply and laying of equipped channels and voltage cables, as well as all electromechanical, electrical, telephone and electronic installations necessary in terms of operation, information, safety and service, etc.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation and maintenance or renovation of heating and air conditioning systems, whatever their level of importance, complete with all related complementary or accessory building work, to be carried out separately from the execution of other installations, in general works that have already been completed or are under construction.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, laying and systematic maintenance or renovation of tracks for any railway, underground railway or tramway line as well as braking and automation equipment for freight sorting facilities.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the supply, installation, maintenance or renovation of electrical, telephone, radio, television and data transmission systems, etc., complete with all related complementary or accessory building work, to be carried out in works belonging to the general categories that have already been built or are under construction.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the supply, installation and maintenance or renovation of lifting and transport systems and equipment, complete with all related , complementary or accessory building work, local or networked, such as cable cars, cableways, ski lifts and cranes, etc.
Mandatory qualification
No
Highly specialised works (SIOSS)
No
List of categories
Concerns the production in industrial plants and on-site assembly of structures made of pre-treated wooden parts.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
Yes
List of categories
Concerns the construction and maintenance of special covers, however built, such as tensile structures, geodesic covers, sliding covers and panelled covers, etc.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction, installation, maintenance and acoustic inspection of road and railway noise barriers made from metal, concrete, wood, glass, or transparent plastic material, biowalls, cellular or honeycomb walls, and sound-absorbing earth retaining walls or tunnel walls.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
List of categories
Concerns the construction and maintenance of any underground works using non-invasive excavation technologies. Includes but is not limited to controlled and uncontrolled horizontal drilling, with the possible reuse and exploitation of existing works, as well as the use of video inspection, rehabilitation, renovation and underground substructure replacement technologies, or technologies for small-scale surface excavations.
Mandatory qualification
Yes
Highly specialised works (SIOSS)
No
* Subject to the provisions of (Italian) Ministerial Decree 154/2017
