It concerns the supply, installation, maintenance, or renovation as well as the execution of non-illuminated road signage, vertical, horizontal, and c...

It concerns the dismantling of industrial plants and the complete demolition of buildings using special equipment or explosives, the cutting of reinfo...

It concerns the construction, maintenance, or renovation of specific interventions carried out in freshwater and saltwater, which serve as terminals f...

It concerns the supply, installation, and maintenance or renovation of rockfall barriers and similar structures, aimed at containing and protecting ag...

It concerns the cleaning with special technical means of any type of water and the transport of the resulting material to the locations prescribed by ...

It concerns the construction, maintenance, or renovation of network interventions necessary to implement the 'integrated water service,' that is, to t...

It concerns the construction, installation, maintenance, and acoustic verification of noise containment works originating from road or railway sources...

It concerns the supply, installation, and maintenance or renovation of structural devices, such as expansion joints, bearing devices, and seismic prot...

It concerns the construction and ordinary and extraordinary maintenance of waste thermal treatment plants and related flue gas treatment and material ...

It concerns the supply, installation, maintenance, or renovation of electrical, telephone, radio, and television systems, as well as data transmission...

It concerns the construction, maintenance, or renovation of flooring made with particular materials, whether natural or artificial, as they are subjec...

It concerns the supply, installation, and maintenance or renovation of plumbing systems, kitchens, laundries, gas, and fire protection systems, regard...