Building of highways, roads, streets, pavements and other roads for vehicles and pedestrians (including the setting of guard rails)
Building of transport and distribution lines for electricity
Terracing work: digging, grading of construction sites, opening of trenches, removal of rocks, destruction with explosives, etc.
Installation in buildings or in other projects of building of: pumbling systems and hygiene appliances, pipes for gas and water (except for heating), setting of automatic extinguishers, etc.
Installation in buildings or in other projects of building of: heating systems by electricity, gas and fuel, boilers, materials and pipes for ventilation and air conditioning, etc.
Installation in buildings or in other projects of building of: heating, cooling and ventilation systems (except heating)
Setting of electrical installations of heating
Implementation in buildings or in other projects of building of: thermal insulation materials, acoustic and antivibrating insulation materials
Work of insulation of pipes for heating or cooling
Other work of n.e.s. installation, including accessories installation
Work of general installation
Assembling of partitions in gypsum
Other works of finishing in buildings n.e.s.
Wholesale trade of equipments for sanitory systems and central heating: pipes, pipe fittings, tabs, rubber pipes, etc.
Chimney sweeping and cleaning of hearths, ovens, incinerators, boilers, air ducts and smoke removal appliances
Preparing land for construction
Electro-technical installation works at buildings
Plumbing works
Laying of floor and wall tiles
Laying of floors and fitting wooden wall-coverings
Hanging wall-paper, as well as flooring and wall-coverings of other materials
Painting of buildings
Other types of works with regard to the completion of buildings
Roofing
Works with cement concrete
Wholesale in common building materials
Do-it-yourself businesses and d.i.y. shops of common building materials
Other types of cleaning of buildings; industrial cleaning
Other types of cleaning activities
Installation of heating, air-conditioning and ventilation