The paper describes the international patent (PCT / IB2013 / 000830) of the Polytechnic of Bari on building construction system "Nexus: Earthquake-proof Self-supporting "dry" construction system composed by environmentally sustainable, stratified and self-clinching blocks". The patent is based on the use of specific materials (cement lightened stones reassembled, plastic materials, ...) to create poly-composed "blocks" for building industry, having high structural, sound-absorbing and insulating resistance. The blocks, made up of layers of different materials, suitably assembled by mechanical fastening and without chemical adhesives, are designed so to allow, at the end of the block life cycle, the separation and reuse of raw materials used for the composition of individual layers. The building system obtained is a completely assembled "dry" and utilizes internal metal couplings to the blocks to achieve a structural cage able to give the building a high seismic resistance.

The theme of urban and housing stock regeneration is today the focal point of a debate on which a large number of researchers and governments at national and international level are focused. In recent years the construction sector has focused primarily on energy efficiency during the construction and management phase, but scant attention has been paid to the needs of a user typology in strong transformation. The heterogeneity of contemporary social groups makes particularly strong the need for experimental models able to interpret the complexity of contemporary living. The research aims in particular to operate in the field of social and temporary housing identifying strategies and tools for the ex-novo design and functional, spatial, technological transformation of traditional housing. Thus, it is possible to combine multiple typological, cultural, energetic and economic factors ensuring high social mixitè and experimenting advanced technical, technological and typological solutions.

A modular, self-supporting structural element for house building construction is described, which is provided whit mechanical constraining means for the dry mutual connection with at least one second modular structural element. The modular structural element has a variable density along at least one reference direction. A building structure comprising a plurality of structural elements which are constrained to each other by said constraining means and a process for the construction of the building structure are also described.

The Netflix block has been designed to solve a wide range of issues related to the division and articulation of interior spaces for residential purposes (temporary housing, highly flexible dwellings, rented houses, ...) and commercial (store, event areas, commercial centers, ...).  Its lightness, ease of handling and ease of assembly ensure rapid installation and flexibility of use for living and furniture spaces.  The guiding philosophy of the block is to ensure a high degree of flexibility in everyday living spaces, guaranteeing acoustic, structural (self-porting and fixing of furniture, wall hangings, etc.) and techniques properties (possibility to host installations) comparable to a traditional masonry, for the walls and elements of division resulting from it. The Netflix system provides several important benefits:  Easy assembly and dismantling of partition walls in self-construction and without the support of any kind of construction equipment, with height varying from the floor  Possibility of individual blocks to be anchored to each other by means of specific mechanical hooks that solidify the wall making it uniform and self-supporting  Possibility of the block and the wall to accommodate the plants thanks to the provision of special cavities and trenches  Possibility of disassembling and re-assembling the same walls at a later stage for obtaining distinct spatial and environmental solutions  Possibility of quick assembly and removal of the finishing surfaces of the blocks and walls.  Possibility of inserting doors and windows into the walls thus obtained  Possibility of interchangeability of the finishes or their partial replacement to obtain different decorative effects within a few minutes  Possibility to use the Netflix Block for basic furniture solutions such as kitchen environments, for the construction of recessed furniture and work surfaces or furniture solutions such as open bookcases, cupboards, .... These features make the product highly appealing to the interior design market, for designing versatile living spaces where it is easy and quick to re-divide spaces and, above all, for commercial, cultural and creative spaces in which requires strong creativity, transformability and high versatility of space in time.