Installation of secondary power supply systems (electrical generators)
Building of transport and distribution lines for electricity
Building of settling tanks and other devices for water disposal
Building of sport fields, game fields, swimming pools, etc.
Destruction of buildings and other kind of buildings
Setting of electric cables and appliances
Setting of electrical installations of heating
Application in buildings and in other projects of building of gypsum or stucco, inside and outside, including the associated lathing materials
Setting in buildings or other projects of building of: wall recoverings or tiles in ceramic, in concrete or in freestones; floorings and wall recovering in granites, etc.
Assembling of frames
Works of recovering in all materials
Setting of rainwater disposal elements
Setting of screeds
Setting of foundations, including pile hammering
Assembling of elements of metallic structures, not made by the unit making the works
Installation of industrial machines, devices and equipment
Construction of residential buildings
Construction of other types of non-residential buildings
Electro-technical installation works at buildings
Electro-technical installation works, with the exception of those executed at buildings
Plumbing works
Insulation works
Plastering work
Carpentry
Laying of floor and wall tiles
Hanging wall-paper, as well as flooring and wall-coverings of other materials