The object of the invention relates to a space element, which has wall elements and at least one floor element rests on the wall elements; both the wall elements and the floor element(s) have a framework encompassing a light concrete filling, and the filling has a covering layer on both of its sides. The object of the invention also relates to a method for the production of the space element.

The development and expansion of the construction industry and construction technology starting from the beginning of the 20 ^th century as a consequence of the accelerated mass home construction and other factors made it increasingly necessary to make the construction process more efficient and economical. Within the scope of this phenomenon system-based construction gained increasing significance, the basis of which was the conscious harmonisation of building material production, planning, construction and the organisation of construction, as well as standardisation and module coordination. After World War II the huge demand for homes created such industrialised construction technology that brought about broad standardisation, including standardisation of building materials and structure production, for which the products were produced in dimension systems and then these products were specified with the selection of a construction module, a suitably selected basic dimension. The various dimensions in the designs were also based on multiples of this module. Buildings based on such a module system, essentially a spatial dimension standardisation system, may be constructed more quickly and more economically than those construction projects that do not use this possibility, therefore their use is essential in construction systems that, for example, wish to satisfy mass housing demands quickly and economically.

In industrialised construction reinforced concrete construction technology is of fundamental importance and is used widely today. This technology is based on the adhesion arising between the concrete and the steel, as a result of which the tensile stresses occurring in the concrete are passed on to the steel. Particularly in the first ^' half of the 20 ^th century, the mass home construction systems all over the world were based on the use of reinforced concrete panels mainly prefabricated in housing factories.

In recent decades light construction technologies have gained more widespread attention; these technologies use, for example, materials installed in a framework, such as construction panels, i.e. wall and floor elements containing mineral wool, light concrete, and similar.

In the light steel structure construction methods currently known, frameworks are usually made from UW, CW, IW steel sections and then panelling is screwed onto the two sides with mineral wool filling in between. The load capacity of the walls largely depends on the material thickness of the steel section and on the quality of the panelling covering the frames.

Such a known light structure home construction system is based on a frame structure made from steel section combined with light concrete. Foam concrete is used as light concrete, which has significant advantages over mineral wool, for example. The load-bearing steel frame is assembled onsite, this is then covered on two sides with cement panelling secured with bolts, then the closed space obtained in this way is filled, part by part, with foam concrete.

The task to be solved with the invention is the further development of light construction technology based on the combination of a steel frame and light concrete, particularly foam concrete, the use of this to especially improve the structural properties of buildings built with this technology, and to make their construction faster and more economical.

The invention is based on the following recognitions:

The onsite operations used in the steel-light structure- foam concrete system described above, i.e. the onsite assembly of the load-bearing steel structure, as well as the production of the foam concrete onsite and its incorporation into the structure, do not only constitute time-consuming operations requiring specialist knowledge, this system also fails to exploit the possibility originating from the joint use of the steel structure, the covering panels and the foam concrete, i.e. their combination as a composite structure, to first of all improve the structural properties of the building.

It was recognised that this possibility may be optimally solved with a prefabricated space element containing walls and floors, the wall elements and floor element of which have a framework formed from steel sections that also constitute the permanent shuttering that connects the nanocement foam concrete and the textile concrete adhesive bridge made with polymer concrete used as a covering layer instead of panelling. Nanocement foam concrete is a three-phase concrete, in other words it has a fluid phase, a solid - solidified - phase, and a crystalized phase. After the cavities of the wall elements have been filled with polymer concrete and the floor element has been positioned on the wall elements, a lattice is formed in the space element assembled from such wall elements and floor elements as a result of the polymer concretes coming into contact with each other, which results in such structural stability so that not only is a building built with such a space element unable to move but it is also safe in the case of earthquakes.

On the basis of the above recognitions the set objective was solved with a prefabricated space element that has wall elements and at least one floor element rests on the wall elements; both the wall elements and the floor element (s) have a frame encompassing a light concrete filling, and the filling has a covering layer on both of its sides, and it is characteristic of the space element that

- the framework of the wall elements is formed from longitudinal rigid section pieces secured to each other using junction section pieces in their corner zones that form a groove along the external side of the framework and being connected to each other at the corner zones they have cavities running in the longitudinal direction;

- the framework of the floor element (s) is formed by an enclosing frame created from rigid longitudinal sections and by, within this, at least one brace rib which has a groove running along its side facing the walls;

- both the grooves of the wall element framework and of the floor element framework, and the cavities in the corner zones of the wall elements connected to each other contain ribs made from a post-hardening material;

- the covering layers are made from a textile concrete that has a binder material of the same type as the binding material of the ribs, as a result of which the ribs along with the covering layers form a rigid spatial lattice structure in the space element extending to its walling formed by the wall elements and to its floor element, and to its floor made from multiple floor elements. The further characteristics of the invention are contained in the subclaims.

In the following the invention is disclosed in detail on the basis of figures, which contain a space element, wall elements associated with it, the steel sections used for the production of these, and the frameworks made from these. In the figures

Figure 1 shows a schematic, perspective view of a space element according to the invention;

Figure 2 shows a front view of a wall element with the covering layer partially removed;

Figure 3 shows the cross-section taken along the line A-A marked in figure 2;

Figure 4 shows the cross-section taken along the line B-B marked in figure 2;

Figure 5 shows a front view of the framework of a wall element according to figures 2 to 4;

Figure 6 shows the cross-section taken along the line C-C marked in figure 5;

Figure 7 shows the cross-section taken along the line D-D marked in figure 5;

Figure 8a shows the cross-section of the longitudinal section piece of a wall framework; Figure 8b shows a perspective view of the longitudinal section piece according to figure 8a;

Figure 9a shows the cross-section of a wall corner point and wall junction point section piece;

Figure 9b shows a perspective view of the section piece according to figure 9a;

Figure 10 shows a larger scale perspective view of a framework with two internal brace ribs, similar to the framework according to figure 5;

Figure 11 shows a larger scale view of the detail E2 marked in figure 2;

Figure 12 shows a larger scale drawing of the detail F marked in figure 3;

Figure 13 shows a top view of a floor element with the covering layer partially removed;

Figure 14 shows the cross-section taken along the line G-G marked in figure 13;

Figure 15 shows the cross-section taken along the line H-H marked in figure 13;

Figure 16 shows a top view of the framework of a floor element according to figures 13 to 15;

Figure 17 shows the cross-section taken along the line I-I marked in figure 16; Figure 18 shows the cross-section taken along the line J-J marked in figure 16;

Figure 19 shows a perspective view of the framework according to figures 16 to 18;

Figure 20 shows a larger scale view of the detail K2 marked in figure 13;

Figure 21a shows the cross-section of a floor section piece;

Figure 21b shows a perspective drawing of the floor section piece according to figure 21a;

Figure 22a shows the cross-section of a floor element closing section piece;

Figure 22b shows a perspective drawing of the floor element closing section piece according to figure 22a;

Figure 23 shows a front view of a perpendicular corner connection of two wall element frameworks;

Figure 24 shows a top view of figure 23;

Figure 24a shows a larger scale view of the detail U marked in figure 24;

Figure 24b shows a larger scale view of the detail W marked in figure 24;

Figure 25 shows a front view of a wall element framework containing a half-opening for a window; Figure 26 shows the cross-section taken along the line L-L marked in figure 25;

Figure 27 shows the view from the direction of the arrow M marked in figure 25;

Figure 28 shows a front view of a wall element made using the wall element framework according to figures 25 to 27 with the textile concrete layer partially removed;

Figure 29 shows the cross-section taken along the line N-N marked in figure 28;

Figure 30 shows the view from the direction of the arrow 0 marked in figure 28;

Figure 31 shows the cross-section taken along the line P-P marked in figure 32 of the lower part of a space element resting on the ground with its wall elements;

Figure 32 shows the cross-section taken along the line R-R marked in figure 31;

Figure 33 shows a larger scale view of the detail S marked in figure 32;

Figure 34 shows a larger scale view of the detail T marked in figure 32;

Figure 35 shows a larger scale view of the detail V marked in figure 32; Figure 36 shows the vertical cross-section of a detail of a space element according to the invention;

Figure 37 shows a top view of the space element according to figure 36;

Figure 38 shows the vertical cross-section of the space element taken along the line X-X marked in figure 36;

Figure 39 shows the view from the direction of the arrow marked in figure 38; the covering layer is partially removed from the wall element;

Figure 40 shows a larger scale view of the detail Z marked in figure 38;

Figure 41 shows a schematic top view of two wall elements connected to each other of a space element side wall according to the invention, to which a secondary wall is connected;

Figure 42 shows a larger scale view of the detail a marked in figure 41;

Figure 43 shows a larger scale view of the detail b marked in figure 41;

Figure 44a shows a cross-section of a section piece for fitting the secondary wall;

Figure 44b shows a perspective view of the section piece according to figure 42. The wall elements 1-4 of the space element shown in figure 1 are closed off with a floor 5, and the wall element 1 contains an opening - door opening and the wall element 4 contains an opening 7 - window opening.

A wall element 2 according to figure 1 is shown in figures 2-4, the framework 8 of which is filled with light concrete - the filling is marked in figures 2-4 with reference sign 9 - and closed off on two opposing sides with a covering layer 10. The framework 8 made from steel section pieces is coated with a thermal protection layer made using nanotechnology; such a material may be selected from the commercially available coating range sold under the name "MANTI Ceramic". The light concrete used for filling the framework 8 is made using nanocement (NCT), which may be the foam concrete known under the name NANODUR, which is a three-phase concrete, in other words it has a fluid phase, a solid phase and a crystallized phase, as a consequence of which such concretes have excellent characteristics.

The crystalline particles of the nanocement known of commercially as, for example, Oxydtron-R4 or NANOCEMENT Oxydtron react actively with the thermodynamically unstable compounds found on the surface of concrete or brick structures and fillers, such as crushed stone, and then create a new thermodynamically stable material structure, closing off the capillaries, the macropores, and filling the intergranular areas at the boundaries of the crystalline particles and the crushed stone pieces, and stopping corrosion and erosion. In addition to this the nanocement significantly reduces the transfer of heat through the walls.

The covering layer 10A has reinforcing inserts embedded in a fine-grain polymer concrete, such as that developed by the German company Dyckerhoff GmbH, which are generally formed from two-sided, carpet-like cushion grids made from glass fibres or carbon fibres and are parallel to each other and are separated by a gap. Polymer concretes are described, for example, in the publication entitled RAPICRET of the company ISOMAT S.A. (Greece, Thessaloniki).

In the present embodiment according to figures 2-4 shown in front view the rectangular based side wall 2 is provided with longitudinal middle pipe bracing 12, which apart from the bracing function has grooves V opening outwards to the surface of the filling 9, which contains the ribs 20 made from polymer concrete. The one groove V is shown in figure 3 and in larger scale in figure 12 empty for better illustration, while the other includes the polymer concrete rib 20. In figure 2 just as in the larger scale figure 12 - a part of the groove V is empty, in its other part the polymer concrete rib 20 is shown. The longitudinal steel sections 22 constituting the bracing 12 are coated with thermal protection layer. The performance of this operation, which will be seen later, takes place after the foam concrete filling 9 has set, but before the covering layer 10 is installed. As it may be seen in figures 3 and 12 the longitudinal steel sections 22 of the bracing 12 located opposite each other facing outwards with the cavities 23 forming the groove V run opposite each other at a distance t, in this way the filling 9 of the wall element 2 also takes up the space between them.

The longitudinal steel section 22, from which - as it will be seen - the framework 18 of the floor 5 according to figure 1 is created, is shown in figures 21a and 21b at a larger scale. The longitudinal steel section 22 - with a cross-section essentially in the shape of a hat - has a cavity 23 widening outwards delimited by inclined side sheets 23a and a base 23b, which cavity 23 forms the grooves V of the wall element 2 according to figures 2 and 3. In addition the longitudinal steel section 22 has fagade sheets 24 and outwardly protruding arms 25. As it can be clearly seen in figure 12 the fagade sheets 24 run along the plane of the surfaces of the foam concrete filling

9.

The framework 8, e.g. that shown in figures 5-7, of the wall element 2 is formed from longitudinal section 11 - with a cross-section essentially in the shape of a hat - made of steel, junction section pieces 21, and the bracing longitudinal steel section 22 discussed above, as shown in figures 8a and 8b. The longitudinal section 11, i.e. the wall section, has a cavity 13 widening outwards delimited by inclined side sheets 13a and a base 13b, two fagade sheets 14, and arms 15 protruding downwards perpendicular to these. The junction section piece 21 - junction wall section piece - according to figures 9a, 9b has a base 21a and two arms 21b protruding perpendicular to these. In this case also the grooves formed by the cavities 13 are marked with reference letter V.

It should be noted that all the section pieces discussed above, in other words the longitudinal section 11, the longitudinal section 22 and the junction section piece 21 are formed from steel section symmetrical along their vertical central axis marked in figures 8a, 21a and 9a with dotted lines.

The longitudinal sections 11 perpendicular to each other are secured to each other in the corner zones where they meet with the interposition of the steel junction section pieces 21 according to figures 9a and 9b in the way shown in the larger scale figure 11. The welds are formed where one of the fagade sheets 14 of the longitudinal section 11 and one of the arms 21b of the junction section piece 21 meet, while the junction section pieces 21 are welded to each other at their arms 21b, 21b that overlap each other. The connection according to figure 11 contains a cavity 16 running longitudinally, which is the detail E marked in figure 2 of the wall element 2 according to figures 2-5, in other words the corner connection junction, and which contains a polymer concrete rib 17; after the welding of the steel sections described above the cavity 16 is filled with polymer concrete. Figure 11 is only a detail of this connection; the complete corner connection solution will be presented later on in figure 24a with reference to figures 23 and 24.

The wall element framework 8 is also shown in perspective view in figure 10.

In the larger scale junction drawing according to figure 12 it may be seen that on the one side the groove V has not yet been filled with polymer concrete, and the textile concrete covering 10 has not yet been spread onto it.

In the following the floor element 5 according to figure 1 is disclosed in detail with reference to figures 13-22b. As with respect to its basic structure the floor element 5 is substantially the same as the wall element 2, the reference signs used in figures 2-12 will also be used in figures 13-22b for indicating identical structural elements.

The floor element 5 shown in figures 16-18 and 19 has a framework 18, which has an enclosing frame 19 made from the section pieces 26 according to figures 22a, 22b and internal brace ribs 27, 28, which are formed from the longitudinal steel sections 22 according to figures 21a, 21b by welding.

The enclosing frame 19 is made from four section pieces 26 according to figures 22a and 22b that are perpendicular to each other, which fit up to each other along their diagonally cut ends and are secured to each other with the welds 26c shown in figure 20. Such a junction, figure 13, detail K2, is shown in larger scale in figure 20a,

Within the enclosing frame 19 there are brace ribs 27, 28 perpendicular to each other in top view, which are formed from the longitudinal steel sections 22 according to figures 21a, 21b in such a way that their cavities 23 face outwards, their fagade sheets 24 lie in one line with the arms 26a, 26b of the junction section piece 26 constituting the enclosing frame 19 and in a common plane, and are secured to each other by welds. The cavities 23 form long grooves V in the structure, which are filled with polymer concrete - in the same way as in the case of the wall element according to figures 2-4 - and after the polymer concrete has set ribs 20 are developed on both surfaces of the floor element 5. It should be noted that the positioning of the textile concrete covering layer 10 takes place before the complete solidification of the polymer concrete of the ribs 20 on the surface of the previously produced foam concrete filling 9 and of the steel enclosing frame 19 and the brace ribs 27, 28, through which the polymer concrete of the ribs 20 and the covering layer 10 come into contact with each other and become bound to each other. Immediately before the positioning of the covering layer 10 the surface of the longitudinal steel sections 22 and of the junction section pieces 26 is covered with a thin layer of polymer concrete. Figures 23 and 24 show two wall elements 3 arranged in one line and connected to each other, as well as the wall element connected to corner of the wall section formed by these at right angles in both front and top views; the previously used reference signs are used accordingly in this case also for marking the structural elements already disclosed. The corner junction, which may be seen at a larger scale in figure 24a, is essentially the same with that presented in figure 11, here, however, textile concrete covering ribbons 10a are mounted onto the junction section pieces 21 as a continuation of the covering layers 10, and between them there are gaps h, which later on are filled with a flexible material r, preferably a polymer material, therefore these locations function as dilation structures in the building. The cavity 16 delimited by the ends of the longitudinal section 11 and the junction section pieces 21 are filled with a polymer concrete rib 17, a welded connection is created along the fagade sheets 14 of the longitudinal section 11 with one of the arms 21b of the junction section piece 21.

It should be noted that in this case also the wall elements 2, 3 are provided with the internal bracing 12 shown in larger scale in figure 12; this are shown with dashed lines in figures 23 and 24.

The rigid connection 29 of two wall elements 3 lined up next to each other is shown in larger scale in figure 24b. It may be clearly seen that the longitudinal sections 11 (see also figures 8a, 8b) are secured to each other with welds 14a along their façade sheets 14, and their cavities 13 turned to face each other together constitute a cavity 30 with a rhombus cross- section with cut off corners, which runs along the entire height of the wall elements 3, and is filled with a polymer concrete rib 31. The gaps 32 containing the welds 14a are closed off with textile concrete covering ribbon 10a (not shown) as a continuation of the textile concrete covering layers 10.

Figures 28-30 show a wall element part 4a (half part) of a wall element 4 containing an opening-window opening 7 according to figure 1, while figures 25-27 show the wall element framework 8a of this wall element part 4a. The wall element framework 4a is made from longitudinal sections 11 (figures 8a, 8b), and its bracing 12 is formed from longitudinal steel sections 22 (figures 21a, 21b), in the same way as the framework 8 according to figures 5-7, however the opening 7 is stabilised by an additional bracing 12b apart from the bracings 12a, which is perpendicular to the bracings 12a, and is in the middle zone of the opening 7 welded to the longitudinal section 11 delimiting this opening 7 from the inside. The ribs 20a, 20b of the bracings 12a, 12b are formed by filling the longitudinal steel sections 22 of the framework 8a with polymer concrete. The foam concrete in figures 28 and 29 is also indicated with the reference sign 9 and the textile concrete covering layer with the reference sign 10. Naturally the wall and floor elements presented above cannot only be used for the construction of the space element according to figure 1, instead by lining such wall elements 1-4 and floor elements 5 next to one another larger space elements may be constructed that even have internal dividing walls. A part of the interconnecting walls 31-35 of one such space element built on, for example, a reinforced concrete foundation base 30 and its connection junctions is shown in figures 31-32, the latter of which may be seen in larger scale in figures 33-35.

As it may be seen in figure 31, the frameworks 8 of the wall elements 1 fit to the upper surface of the foundation base 31 so that there the cavity 13 of the longitudinal section 11 constituting the lower arm of the framework 8 (see figures 8a, 8b) is closed off from below by this surface, therefore, as it may be clearly seen in the larger scale figure 33, channels 30a are created, which are filled with polymer concrete, and the ribs 31 (base ribs) are formed after this has solidified. It should be noted that a polymer concrete layer 30b is applied to the surface of the foundation base 30 along the trace lines of the walls 1, 2 before they are installed, into which the polymer concrete of the rib 36 is impressed.

The corner junction according to figure 32 of the walls 1 and 2 containing the rib 17 is identical to the junction according to figure 24a, which ahs already been explained. The detail T marked in figure 32 is shown in larger scale in figure 34. The space delimited by the longitudinal sections 11 welded to each other at their points of contact and appearing on the fagade sides of the walls 31, 33 arriving from three sides is closed off by a junction section piece 21, and the rib 37 is created in the cavity 37a created in this way after it is filled with polymer concrete and the polymer concrete has solidified. Textile concrete covering ribbon 10a fitting onto the junction section piece 21 is secured between the covering layers 10 of the wall elements 2 of the wall 31 containing the foam concrete filling 9, and filling made from this material (not depicted) is applied in the corner zones 37b for the purpose of preventing the development of thermal bridges.

In the junction according to figure 35 two wall elements 2 of the wall 31 and one wall element 1 of each of walls 34 and 35 meet, which are secured to each other with welds 39a, and the longitudinal sections 11 form a cavity with each other on their fagade sides, in which the rib 38 is created after the polymer concrete filled into it has solidified. In this case also the corner zones 38a are closed off with textile concrete covering ribbon 10a, with which it is ensured that the structure has no thermal bridges.

The connection of the wall elements 2 indicated in figures 1-12 and the floor element 5 shown in figures 13-22b is disclosed in figures 36-40. As these figures contain all the details of the wall elements 2 and the floor elements 5, these are shown schematically in figures 36-40 and without indication of all of the reference signs, and we will refrain from explaining their structure here. It should be noted that in figures 38 and 39 the space element assembled from the wall elements 2 and the floor elements 5 rests on a reinforced concrete foundation base 30, however in figures 36 and 37 only a detail of this space element is shown for the purpose of better explanation.

The connection of the wall elements 2 and the floor elements 5 is performed in such a way that the polymer concrete ribs 20 of the wall elements 2 are in intensive contact with the polymer concrete binder of the textile concrete covering layers 9 of the floor elements 5; the arrangement of this connection is clearly displayed in the larger scale figure 40. The positions of the rib 17 according to figure 24 and the ribs 31 according to figure 24b in the structure have been indicated in the schematic figure

37.

Figure 40 also shows that the external fagade side of the enclosing frame 19 of the floor element 5 is covered with textile concrete covering ribbon 10a in such a way that gaps h remain, on the one part, between the upper covering layer 10 and the covering ribbon 10a, between the covering ribbon 10a and the external covering layer 10 of the wall element 2, and between the lower covering layer 10 of the floor element 5 and the inner covering layer 10 of the wall element 2, and these gaps h are filled with a polymer-based flexible material r, thereby providing the dilation of the structure.

Figures 41-43b show a secondary wall 50 made from plasterboard and fitted to the internal surface of a side wall of a space element according to the invention as well as its securing junction points.

In the large majority of cases plasterboard walls are installed in the internal spaces of construction projects using dry construction technologies, which became increasingly widespread in the twentieth century, because plasterboard regulates and equalises humidity: if the air is too moist it such the moisture from the air, and if it is dry it emits moisture, and so it has a preferable physiological effect.

The heating and cooling of homes have also gained a new interpretation with the increased use of dry construction technologies. A consequence of modern construction methods is that the building has better thermal insulation, the walls have lower heat transmittance, and their heat capacity is also lower, i.e. they store less heat, and in addition they create a favourable feeling of comfort, a cool environment in the summer and warmth in the winter.

As opposed to this the houses built using conventional construction methods do not have this equalisation ability due to their low heat capacity, therefore floor heating, and, as a result of this, wall heating and ceiling heating have become popular. In dry construction the widely used method for implementing wall heating and ceiling heating is the secondary wall, which is covered with plasterboard.

Conventionally secondary walls are made using C and U section - usually steel section. In the case of wall heating, when the heating appliances or pipes are installed behind the plasterboard, the effect of thermal dilation also has to be taken into account, as a consequence of which cracks may occur at the meeting points of the plasterboard panels. Usually these cracks are prevented by installing two C sections back to back next to one another with a sponge material between them at the places where the panels meet. The C sections are seated into a U section and the free movement of these equalises the stresses created by changes in temperature. Flexible grout is used at the meeting of two panels, which is reinforced with glass fibre textile.

The disadvantage of this solution is that it is elaborate, preparation requires a lot of time and material, and if a pipe or cable needs to be installed in the horizontal direction, then every single C section has to be drilled through at the same place, which is also circuitous.

It was recognised that if the elements of a plasterboard secondary wall are secured to the wall or ceiling of a space element with the interposition of a hat-shaped section made from a solid but flexible material, the two arms of the section ensure the thermal dilation movement, and the assembly of the secondary wall elements becomes simpler, faster and cheaper, than in the case of the methods currently known.

In the following the use of a secondary wall is presented assembled onto a wall 31 assembled from wall elements 2 with a framework 8 made from longitudinal sections 11 according to figures 23, 24 and 24b, with a light concrete filling in these and only indicated at certain places and covered with a textile concrete covering layer 10; it should be note that the internal bracing 12 of the framework 8 is not shown here in the interest of better comprehensibility.

The connection of the secondary wall 50 made from plasterboard panels 50a to the wall 31 takes place using steel securing sections 51 shown separately in figures 44a and 44b, which are sections in the shape of a hat and have a base sheet 51a, angled side sheets 51b spreading out from this, fagade sheets 51c parallel with the base sheet 51a, as well as arms 51d protruding downwards perpendicular to the fagade sheets 51c, which arms 51d have bent back tabs 51e at their ends.

The panels 50a are secured to the wall elements 2 at multiple locations with the securing sections 51, at the point where panels 50a meet, and at one intermediate position as well; an example of this may be seen in the larger scale figure 42. This connection results in a load bearing wall, the base sheet 51a of the securing section 51 lies up to the side of the panel 50a facing the wall element 2, and is secured to it with a screw, a panel screw, while its fagade sheets 51c fit up to the covering layer 10 of the wall element, and is secured to the wall element 2 using fastening elements 52 passing through it. At those positions where cupboards, shelves, etc. are to be secured to the secondary wall 50, the connection according to figure 42 is installed at the density corresponding to the given load, which ensures the desired load capacity.

The junction according to figure 43 is not only the location of two plasterboard panels 50a of the secondary wall 50, but also the previously disclosed location of the connection of two wall elements 2. As it may be seen, here the base sheet 51a of the securing section 51 is fitted to the flexible material 32a, grout, filling the gap 32 between the wall elements 2, and the fastening element 52 passing through it is secured to the framework 8 of the wall element 2. The panels 50a rest on the fagade sheets 51c of the securing section 51 and are secured to them using screws 53. The gap 54 between neighbouring panels 50a is filled with a flexible grout material to permit thermal dilation.

The flexibility of the side sheets 51b of the securing section 51 ensures thermal dilation movement. If any pipes or cables need to be installed horizontally behind the secondary wall 50, this may be performed at the position where the securing section 51 passes through with a simple cut-out, which does not cause any structural problem at all. The bent back tabs 51e of the securing section 51 have a role if ceiling cooling apparatus is to be installed between them. The curved bent back tabs 51e enable the simple hooking on of the apparatus.

The advantage of the invention is that buildings with significantly lower weight, greater structural rigidity and significantly increased thermal insulation capability than the known light structure buildings may be built using the space elements according to the invention. The space element and its components may be standardised and grouped into a module system, and in this way it becomes possible to create building with diverse ground plans and functions with particularly favourable costs and labour investment.

Naturally the invention is not limited to the embodiments of the space element and its parts detailed above, and numerous versions may be implemented within the scope of protection defined by the claims.