A foundation unit (Figure 1) corresponds to a cell of the structural skeleton's grid; it may have either rectangular or triangular shape. Includes steel joints where columns can be connected, as well as trusses (Filigran), both perimetric and diagonal, ending at the joints. The foundation units are assembled on reinforced screed (Figure 2)and then receive cast concrete after wire meshes have been placed. This results in a compact foundation slab 24 cm thick, having sockets where columns can be screwed. The particular kind of foundation offers both structural and anti-earthquake sufficiency, while requires less excavations and materials than the conventional foundation.

        The Pre-slab (Figure 1) is a structurally self-sufficient element of a floor slab which also works as a mold of the completed floor slab. A pre-slab corresponds to a cell of the structural skeleton's grid; it may have either rectangular or triangular shape. Includes a thin base made of reinforced concrete, steel joints (Figure 2-a)where columns can be connected, as well as trusses (Filigran), both perimetric and diagonal, ending at the joints (Figure 2-b). The pre-slabs are positioned in their place within the structural skeleton and connected to the supporting columns by screwing. Then the plumbing pipes (Figure 4-a), as well as the underfloor heating/cooling pipes (Figure 3). are installed. When all the pre-slabs, as well as the pipework of the floor have been installed (Figure 4-a), expanded polyurethane fills the triangular spaces formed between the trusses (Figure 4-b) while wire meshes are placed at the upper part of the floor. Concrete casting follows (Figure 4-c) which completes the construction of the floor slab. The concrete forms within each pre-slab both perimetric and diagonal beams that include the trusses as aramature. It also forms an upper layer reinforced by the wire mesh which has been placed there (this layer incorporates the potentially installed underfloor heating/cooling pipes). The floor slab constitute a "sandwich slab" 22cm thick.

        The Column (Figure 1)has a 42X17cm non-regular hexagonal cross-section, while consists of reinforced concrete; it has special channels that accommodate the routing of both HVAC and telephone cabling. Elements of the column's armature (tie rods) end to sockets where the jointsof either a pre-slabs or a foundation unit can be screwed. The column's non-regular hexagonal cross-section allows combination of single columns, which results in composite ones at the points where joints of different pre-slabs or foundation units. contact. Composite columns include void spaces that accommodate vertical routing of pipework (Figure 2). A typical 2.75m high column weights 400kg.

    The Joint (Figure 1) is a 34/34/21cm element, made of steel, weighting 21kg. Joints are incorporated at the corners of pre-slabswhile they are welded to the trusses (Filigran) that constitute the main armature (Figure 2). Joints are critical elements of the system, as make sure the accuracy of the composition of all the structural elements in the construction. A joint can be constructed by welding common steel plates. Joints can be produced by either a large or a small industry depending on the scale of the production. The average price of a joint (prices could be slightly diversified depending on the method and the institution of the production) is 25€.