Included specialized enterprises in the implementation of the operations related to the construction of the buildings and construction of steel structures and metal parts and installation of prefabricated construction in the work site construction include those buildings, factories, warehouses, hangars and other ROOFED areas or sheds and structures of bridges and tunnels, including the implementation of all civil acts such construction, such as the foundations and the Asphalting of the floors and the implementation of the various extensions of the installations that manufacture these constructions have been classified in another place. Municipalities determine the number of floors permitted construction.