## 3 Case Study: AURA Project
### Building Scale  
From the research on the rehabilitation of obsolete structures existing in Spain after the real estate crisis that resulted in a large number of unfinished buildings throughout the Spanish territory, the idea of a three-dimensional mesh or network arises. To this end, from an urban approach to inhabit the city, the proposal envisages the construction of this mesh as a way of organizing the territory and its scales (from the general: Master Plan; to the particular: prototype built in the Solar City); and it accumulates all the technical, service, and basic structural aspects for the exercise of inhabiting. It goes from the territory to the housing, passing through the neighborhood and the building.  
Thus, the main concept behind the building-scale project refers on its development in two phases, based on a system of progressive occupation from the mentioned main three-dimensional network (Figure 8):  
* Phase 0 (initial): in this phase the community part of the building is configured. The three-dimensional structural mesh that distributes the communications and the facilities throughout building. The entire structural and functional system is configured in this phase, forming a spatial grid, in which the communications are distributed horizontally and the installations vertically. This mesh will be the container of the habitable volumes, dimensions \(9\times 9\times 3\) m, where different homes will be installed.  
Figure 7: Master Plan.  
Phase 1 (occupation): Self-construction, simple construction systems are proposed, which can be developed by the inhabitants of the building themselves, under technical bases previously defined by architects and under their supervision.  
A system of porticoes is formed by panels that act as prefabricated reinforced concrete load-bearing walls, to avoid seismic loads on the building, this being braced with plates made of the same material to form the floor the slab of the different floors. This main network is complemented by a vertical communication system, which includes facilities and communication cores, in order to obtain the highest possible level of accessibility in height.  
As for the facilities, it is expected that they will be integrated into the three-dimensional mesh, so the different networks will be led to the points of attachment in the access to the house. It is a system, therefore, where all its parts are configured from industrialized elements, providing quality assurance to the technique of self-construction, so deeply rooted in the humblest strata of Santiago de Cali.  
This is due to the fact that industrialization is a rational and automated production process, which involves advanced designs of production, manufacturing, and management technologies, where materials, transport, and mechanized techniques are used in series with the aim of achieving the highest possible productivity [37; 38; 39; 40].  
The industrial manufacturing process generates higher quality end products, shorter delivery times, more flexibility, safer working conditions, waste minimization, more possibilities for reuse and, consequently, greater respect for the environment [41; 42].