EP4689321A1

EP4689321A1 - Floor assembly

Info

Publication number: EP4689321A1
Application number: EP24718279.3A
Authority: EP
Inventors: Tom VERSTAEN; Daisy BOHYN
Original assignee: Staenis BV
Current assignee: Staenis BV
Priority date: 2023-03-31
Filing date: 2024-03-27
Publication date: 2026-02-11
Also published as: WO2024201317A1; BE1031478B1; BE1031478A1

Abstract

A floor assembly (1) for positioning on a load-bearing surface, comprising lower floor elements (10), each comprising: a framework (11) which comprises a multiplicity of fitting openings (13); and a multiplicity of structural elements (12) which are connected to the framework (11) so as to be upright with respect to the framework (11), upper floor elements (30), each comprising: a framework (31) which comprises a multiplicity of fitting openings (33); and a multiplicity of structural elements (32) which are connected to the framework (31) so as to be upright with respect to the framework (31), wherein the lower floor elements (10) are provided so as to be able to be mutually fitted in a stacking position, and wherein the upper floor elements (30) are provided so as to be able to be mutually fitted in a stacking position, and wherein each lower floor element (10) and each upper floor element (30) is provided so as to be able to be mutually fitted in a load-bearing position, the floor assembly (1) further comprising adjustment devices (2) which are able to be fastened to the floor elements (10, 30), for adjusting, in the load-bearing position, a distance to the load-bearing surface.

Description

FLOOR ASSEMBLY

The present invention relates to a floor assembly and to a floor construction comprising this floor assembly.

Floors usually comprise a load-bearing floor, such as a concrete floor slab, and a covering floor, such as tiles, laminate or parquet. However, in many cases the loadbearing floor is not flat or high enough for direct fitting of the covering floor on the load-bearing floor. For this reason, a top layer is fitted on the load-bearing floor and provides a flat and/or elevated surface for the fitting of the covering floor. The most common top layer is screed. Such screeds are often used in living areas. The “conventional” screed comprises sand, cement and water. To improve the properties of the screed, additional components may also be added, such as polyurethane, expanded polystyrene, fibres and/or other additives. Examples of such top layers are described and depicted in EP3397824A1.

KR 102 147 621 Bl describes and depicts a modular floor assembly which is, however, not suitable as top layer for levelling an uneven load-bearing floor for the fitting of a covering floor thereon. It is an object of the present invention to provide a floor assembly which is suitable not only for producing an elevated surface but also for being able to provide a levelled flat surface for the fitting of the covering floor.

A disadvantage of the known top layers which can also be used to level uneven loadbearing floors is that the production and the extraction of the components thereof is polluting. In particular the emission of greenhouse gases during the production of polyurethane, expanded polystyrene and cement and the emission of greenhouse gases during the extraction of sand are a disadvantage of the known top layers. In addition, toxic substances are also released when positioning these known top layers. For instance, the compression of polyurethane when positioning a top layer comprising polyurethane can have the result that toxic substances contained in the polyurethane, including benzene, chlorine and formaldehyde, are released.

An additional disadvantage is that the known top layers have a permanent character. The average life of a known top layer is 25 years. Once positioned, such known top layers are difficult to remove, usually only by demolition work, the positioned top layer of the load-bearing floor being drilled. This demolition work takes a lot of time and energy, which is why it is usually only carried out during extensive renovation of a room or building. A positioned top layer is usually still present up to the definitive demolition of the entire building.

An additional disadvantage is that the components of the known top layers are heavy, and a weight of more than 100 kg per square metre of floor is quickly reached. As a result, it is financially detrimental to transport the components and the positioning of such a known top layer is disadvantageous for the physical ergonomics of the contractor or the do-it-yourselfer.

It is an object of the present invention to provide a floor assembly for which the emission of greenhouse gases is limited. In addition, it is an object of the present invention to provide a floor assembly for which the emission of other toxic substances that are released during the production and positioning of a top layer, which may or may not be provided with additional components, such as polyurethane or expanded polystyrene, is limited. In addition, it is an object of the present invention to provide a modular floor assembly. In addition, it is an object of the present invention to provide a floor assembly which is easy to transport and position.

This object is firstly achieved by providing a floor assembly designed to be positioned on a load-bearing surface, comprising lower floor elements, each comprising a framework which extends along a first plane, wherein the framework comprises a multiplicity of fitting openings, the lower floor elements further comprising a multiplicity of structural elements which are connected to the framework and are upright with respect to the framework, upper floor elements, each comprising a framework which extends along a second plane, wherein the framework comprises a multiplicity of fitting openings, the upper floor elements further comprising a multiplicity of structural elements which are connected to the framework and are upright with respect to the framework, wherein the lower floor elements are provided so as to be able to be mutually fitted in a stacking position in which the first planes are parallel and in which the structural elements of a first said lower floor element are fitted through the fitting openings of a second said lower floor element and in which the structural elements of the first said lower floor element and the structural elements of the second said lower floor element are upright with respect to the respective frameworks on the same side, and wherein the upper floor elements are provided so as to be able to be mutually fitted in a stacking position in which the second planes are parallel and in which the structural elements of a first said upper floor element are fitted through the fitting openings of a second said upper floor element and in which the structural elements of the first said upper floor element and the structural elements of the second said upper floor element are upright with respect to the respective frameworks on the same side, and wherein each lower floor element and each upper floor element is provided so as to be able to be mutually fitted in a load-bearing position in which the first planes coincide with the same ground plane and in which the second planes coincide with the same floor plane, the ground plane and the floor plane being parallel, and in which the structural elements of each lower floor element are upright with respect to the respective framework of this lower floor element on a side opposite the side on which the structural elements of each upper floor element are upright with respect to the framework of this upper floor element, and wherein said structural elements of each said lower floor element extend between said structural elements of the upper floor elements, and wherein each said upper floor element is supported on at least one said lower floor element, and wherein the floor assembly further comprises a plurality of adjustment devices which are able to be fastened to said lower floor elements and/or to said upper floor elements, wherein the adjustment devices are suitable for adjusting, in the load-bearing position, a distance between the floor plane and the load-bearing surface.

Hereinafter, the term “floor elements” will be used if reference is made to both the lower floor elements and the upper floor elements. Properties or features discussed with regard to floor elements thus apply to both the lower floor elements and the upper floor elements, unless stated otherwise.

In this document, the term “floor plane” refers to the top side of the upper floor elements in a load-bearing position, the floor assembly being positioned on a loadbearing surface. This floor plane typically forms the surface on which the final covering floor is fitted on the floor assembly. In this document, the term “load-bearing surface” refers to that surface of the load-bearing floor on which the floor assembly is fitted as top layer. The term “ground plane” refers to the bottom side of the lower floor elements in a load-bearing position, the floor assembly being positioned on a loadbearing surface. The ground plane and the load-bearing surface coincide by virtue of the lower floor elements being positioned directly on the load-bearing surface. The floor assembly comprises adjustment devices, such that the ground plane does not necessarily coincide with the load-bearing surface.

Hereinafter, additional solutions and advantages of the floor assembly are also mentioned, which are also applicable in alternative floor assemblies that are not provided with said adjustment devices.

By providing lower floor elements and upper floor elements which can be positioned supported on each other in the load-bearing position, a floor assembly is provided which can be positioned as a top layer. With the aid of a said adjustment device, it is possible in this case for the distance between the floor plane and the load-bearing plane at this adjustment device to be adjusted in such a way that any unevennesses in the load-bearing floor can also be compensated. With a plurality of such adjustment devices, it is thus possible for other distances between the floor plane and the loadbearing surface to be adjusted at various locations at these adjustment devices in order to level uneven load-bearing floors as required, such that a flat surface can be readily produced on top of an uneven load-bearing floor for the fitting of the covering floor thereon. It is no longer necessary to extract sand for the provision of a top layer for levelling uneven load-bearing floors. Moreover, it is no longer necessary to provide additional elements such as polyurethane or polystyrene. As such, the floor assembly according to the invention is a top layer with an ecological footprint that is smaller than the ecological footprint of the known top layers, and can also be used to level uneven load-bearing floors.

Furthermore, the floor assembly can be readily taken out of the load-bearing position by simply withdrawing the upper floor elements from the lower floor elements. As such, the floor assembly according to the invention is a top layer which can be readily removed. The removal of the upper floor elements and subsequently the removal of the lower floor elements is also not destructive, meaning the floor assembly is reusable. In this way, the floor assembly according to the invention is a circular product. By providing the fitting openings in the framework of the floor elements, it is possible for the upper floor elements and the lower floor elements to be positioned in their respective stacking positions. As explained below with regard to the figures, the stacking position is significantly more compact than the load-bearing position. As a result, the floor assembly according to the invention is readily transportable.

The floor elements comprise the framework and the multiplicity of structural elements. In the load-bearing position, the structural elements preferably extend in such a way that a free space extends between these structural elements. This has the result that, in the load-bearing position, the floor assembly is not a solid object, but rather there is a certain amount of free space incorporated in each framework and between the structural elements. As a result, the floor assembly is significantly lighter than the known top layers. This lower weight of the floor assembly according to the invention is advantageous both for the transporting of the components of the floor assembly and for the positioning of the floor assembly.

Preferably, the free space extending between the structural elements has such a shape that, when a structural element of a lower floor element is received between structural elements of the upper floor element, the structural element of the lower floor element bears against a number of structural elements of the upper floor element in such a way that translation of the structural element of the lower floor element in a direction parallel to the ground plane is prevented.

The structural elements of the floor elements may, for example, be conical. As an alternative, the structural elements may have the shape of a truncated or non-truncated pyramid.

The structural elements are preferably hollow in order to reduce the weight thereof.

In the load-bearing position, the adjustment devices are preferably adjustable from a side of the floor plane facing away from the load-bearing surface. It is thus possible, after such a floor assembly has been positioned in the load-bearing position, for such an adjustment device to be adjusted as required, in order for the adjustment of the distance between the floor plane and the load-bearing surface to be adapted at this adjustment device.

To this end, each upper floor element may preferably comprise one or more adjustment openings which extend through the floor plane, wherein each adjustment opening is suitable for receiving an adjustment device. These adjustment openings are preferably provided together with the adjustment devices in such a way that, after an adjustment device has been fitted in a said adjustment opening, the adjustment device is adjustable via this adjustment opening so as to be able to adjust it from a side facing away from the load-bearing plane.

As an alternative, it is for example possible to provide the upper floor elements in such a way that, in the load-bearing position, an opening is formed between these upper floor elements and can serve as an adjustment opening via which an adjustment device fitted therein is adjustable.

Such adjustment openings in the upper floor elements or between the upper floor elements are further preferably provided in such a way that an adjustment device is able to be fitted through the floor plane into this adjustment opening. This makes it possible for the adjustment device to be fitted after one or more upper floor elements, together with one or more lower floor elements, have already been positioned in the load-bearing position on the load-bearing surface. This allows the upper floor elements and the lower floor elements to first be positioned in the load-bearing position on the load-bearing surface. One or more adjustment devices can subsequently be introduced into one or more corresponding adjustment openings of the upper floor elements. Lastly, the distance between the floor plane and the load-bearing surface can be adjusted. After the distance between the floor plane and the load-bearing surface has been adjusted, it is possible that the adjustment device still extends partially above the floor plane. Here, that portion of the adjustment device which extends above the floor plane can be removed, for example by sawing it off. In order to avoid this sawing-off operation, a plurality of adjustment devices having different dimensions are also possible, such that it is possible, as desired, for an adjustment device having an appropriate dimension that will not extend above the floor plane to be installed. A covering floor can subsequently be installed. In addition, each lower floor element may comprise one or more adjustment openings, wherein each adjustment opening is suitable for receiving an adjustment device. As an alternative, the lower floor elements may for example be provided in such a way that, in the load-bearing position, an opening is formed between these lower floor elements and can serve as an adjustment opening. These adjustment openings in the lower floor elements or between the lower floor elements are also preferably provided in such a way that an adjustment device is able to be fitted through the floor plane into this adjustment opening.

Each lower floor element and each upper floor element is preferably provided with said adjustment openings, which are provided in such a way that, in the load-bearing position, an adjustment device is able to be fitted in corresponding adjustment openings of a said lower floor element and a said upper floor element.

The adjustment openings are preferably distributed uniformly over the framework of each floor element. The adjustment openings of a floor element are preferably arranged in a first row and in a second row which extends at an angle, which differs from a multiple of 180°, with respect to the first row. The angle between the first row and the second row is preferably 90°. By distributing the adjustment openings uniformly over the framework of a floor element, it is highly likely that at least one adjustment opening is suitable for adjusting the distance between the floor plane and the load-bearing surface. For example after the floor element has been positioned, other adjustment openings may not be suitable for adjusting the aforementioned distance because the adjustment opening is directly above a cable or pipe, or because the adjustment openings are in a portion of the floor element that is removed so that the floor element could be positioned in a comer or against a wall.

Preferably, the adjustment openings of a floor element are arranged every 7 cm in the first row. Preferably, the adjustment openings of a floor element are arranged every 7 cm in the second row.

Each adjustment device is preferably able to be adjustably fastened in a said adjustment opening in order to fasten this adjustment device to a said upper floor element. Preferably, to this end, the adjustment openings of each upper floor element and/or the adjustment openings each lower floor element are openings which comprise an internal screw thread and the adjustment devices comprise a corresponding external screw thread. Rotating the adjustment devices in the adjustment openings makes it possible to adjust the distance between the floor plane and the load-bearing surface. As an alternative, to this end, the adjustment devices are designed to be firmly click- fitted in a stepwise manner in the adjustment openings of each upper floor element and/or the adjustment openings of each lower floor element. As a further alternative, the adjustment devices may be able to be fastened to the lower floor elements and/or to the upper floor elements in a different way so as to be adjustable in terms of height, wherein they can then extend freely into a said adjustment opening in order to be received in this adjustment opening.

Each upper floor element and each lower floor element is preferably provided with corresponding adjustment openings, which are provided with a said internal screw thread, in such a way that when the adjustment devices are rotated in corresponding adjustment openings, the corresponding upper floor element and the corresponding lower floor element are held against each other and possibly pulled, in order to prevent this upper floor element and this lower floor element from coming loose from each other. As an alternative or in addition, separate securing elements may be provided, which are provided with a corresponding external screw thread, in such a way that when these securing elements are rotated in corresponding adjustment openings, or in alternative corresponding securing openings, with a corresponding internal screw thread, the corresponding upper floor element and the corresponding lower floor element are held against each other and possibly pulled.

In addition, in the load-bearing position, at least some of the structural elements of a said upper floor element may be supported on said structural elements of one or more said lower floor elements in order to support a said upper floor element on the at least one said lower floor element. In the load-bearing position, there is preferably a distance between each structural element of a lower floor element and the framework of an upper floor element which engages in the region thereof into the lower floor element. This distance is preferably a few tenths of millimetres to a few millimetres. There is preferably also a distance between each structural element of an upper floor element and the framework of a lower floor element which engages in the region thereof into the upper floor element. This distance is also preferably a few tenths of millimetres to a few millimetres. In this way, there is no direct contact between the structural elements of said lower floor element and the framework of said upper floor element and there is no direct contact between the structural elements of said upper floor element and the framework of said lower floor element. Some structural elements of lower floor elements and neighbouring structural elements of upper floor elements are in contact with each other. Due to these mentioned distances between the structural elements and respective frameworks, the floor assembly has an acoustic damping effect.

The structural elements of the floor elements preferably comprise one or more oblique walls in such a way that, in the load-bearing position, the one or more oblique walls of the structural elements of the upper floor elements are supported on the one or more oblique walls of the lower floor elements.

The lower floor elements and the upper floor elements may preferably be click-fitted into each other in the load-bearing position.

The lower floor elements and the upper floor elements are preferably connected to each other by means of a connecting element in the load-bearing position. This connecting element may, for example, be a connecting screw. More specifically, such a connecting screw may be embodied as the securing element described above or a said adjustment device provided with an external screw thread, corresponding to an internal screw thread in said adjustment openings and/or securing openings. The connecting of the floor elements by means of a connecting element ensures that the floor assembly does not fall apart and increases the stiffness of the floor assembly.

The structural elements of a floor element may preferably be distributed uniformly over the framework of the floor element. This has the result that the number of structural elements of a lower floor element that are received between structural elements of an upper floor element in the load-bearing position can vary as desired. For instance, only one structural element of a lower floor element may be received between the structural elements of the upper floor element, or the majority of the structural elements of the lower floor element may be received in the free space between the structural elements of the upper floor element.

Furthermore, due to the fact that the structural elements of a floor element are distributed uniformly over the framework of the floor element, it is possible for a portion of a floor element to be removed without reducing the practical usability of the floor element in the process. It is for example possible for a portion of a floor element to be sawed off in such a way that the floor element can be positioned in a corner or against a wall.

The distribution of the structural elements over the framework of a lower floor element preferably differs from the distribution of the structural elements over the framework of an upper floor element. The aforementioned distributions of the structural elements preferably differ in such a way that, when a lower floor element and an upper floor element are positioned in the load-bearing position, the frameworks of these floor elements overlap each other and thus extend over the same area.

The structural elements of a lower floor element may preferably be arranged in a first row and in a second row which extends at an angle, which differs from a multiple of 180°, with respect to the first row. The angle between the first row and the second row is preferably 90°.

The lower floor elements and/or the upper floor elements may preferably comprise linking elements for linking together one or more lower floor elements and/or linking together one or more upper floor elements. Each linking element preferably has an orientation, the orientation determining the direction in which the linking element can be linked to another linking element. A floor element preferably comprises a multiplicity of linking elements on one side thereof, this multiplicity of linking elements each having a different orientation.

Preferably, in the case of both the lower floor elements and the upper floor elements, each structural element may comprise a base portion near the framework, an end portion near an end of the structural element facing away from the framework, and a middle portion between the base portion and the end portion, the middle portion having a lower specific weight than the base portion and the end portion. A structural element may, for example, comprise a shell. In this case, the shell may comprise cavities in such a way that the middle portion of the structural element has a lower specific weight than the base portion and the end portion. As an alternative or in addition, a thickness of the shell may vary in such a way that the middle portion of the structural element has a lower specific weight than the base portion and the end portion.

By providing structural elements having a middle portion with a lower specific weight than the base portion and the end portion, structural elements are provided which behave, in accordance with the mechanics of materials, like I profiles. In this way, structural elements with a relatively high bearing strength with respect to the weight of the structural elements are obtained. The floor elements and the floor assembly then also have a relatively high bearing strength in relation to the weight thereof.

Preferably, the framework of each lower floor element has a thickness perpendicular to the first plane of between 1 and 20 mm, more preferably 15 mm, and/or the framework of each upper floor element has a thickness perpendicular to the second plane of between 1 and 20 mm, more preferably 15 mm. If the floor assembly is intended to be positioned in an environment in which heavy loads on the floor are expected, the thickness of the framework may then be greater than 20 mm.

Preferably, the framework of each lower floor element along the first plane is a rectangular framework and/or the framework of each upper floor element along the second plane is a rectangular framework. Preferably, here the rectangular framework of each lower floor element has a length of 40 cm and a width of between 40 cm and 80 cm and/or the rectangular framework of each upper floor element has a length of 40 cm and a width of between 40 cm and 80 cm. As an alternative, the rectangular framework has a length of 80 cm and a width of 120 cm. A floor element having a framework with such formats can be easily transported on a Euro-pallet. More specifically, a framework may have a square shape. As an alternative, the framework of a floor element may, for example, have a hexagonal shape. Other alternative shapes will be obvious to a person skilled in the art. Furthermore, the shape of the framework of the lower floor element and the shape of the framework of the upper floor element do not need to correspond. Each structural element of a floor element preferably has a length that is approximately five times the thickness of the framework of said floor element. Depending on the environment in which the floor assembly is positioned and the loading to which the floor assembly will be subjected, the dimensions of the structural elements and the framework may be adapted.

Each upper floor element may preferably comprise one or more filling openings, wherein the one or more filling openings are suitable for applying filling material in the floor assembly in the load-bearing position.

Filling material can be applied in the floor assembly through the filling openings when the floor elements are in the load-bearing position. Here, the filling material fills the free space present in the framework, possibly between structural elements and possibly in hollow structural elements. The filling material may be a thermally insulating filling material, such as beads of expanded polystyrene. An advantage of the floor assembly is that filling material can be applied loosely in the floor assembly. It thus does not need to be incorporated into another material as is the case in the known screeds. In this case, the filling material can also be removed again by taking it out of the floor assembly. The filling material may subsequently be reused or be recycled in some other way. Another advantage of the filling material is that the filling material has a substantially lower weight than a cement floor.

The fitting openings of each upper floor element may preferably be designed to serve as filling openings.

The floor assembly preferably further comprises at least one of the following: floor heating, covering floor, and a cable tray. A covering floor may, for example, be tiles, linoleum, laminate or parquet. As an alternative, the covering floor may be a metal covering floor, possibly provided with anti-slip devices. The floor assembly may thus for example comprise both floor heating and a linoleum covering floor. In addition, the floor assembly may comprise an intermediate layer, such as a soundproofing and/or insulating sheeting, located between the floor elements and the covering floor. Other combinations will be obvious to a person skilled in the art. The floor elements are preferably manufactured from plastic. The floor elements are more preferably manufactured from propylene. The adjustment devices may, for example, be manufactured from acrylonitrile butadiene styrene. As an alternative, the framework of the floor elements may be manufactured from wood or composite. In an alternative embodiment, the lower floor element has a solid framework. Here, the solid framework may, for example, be manufactured from a moisture-resistant material. Such a lower floor element may, for example, be positioned on a wet load-bearing surface. As an alternative, in the case of a wet load-bearing surface, the floor assembly may be positioned on a construction sheeting, glass granules or a shale layer. As an alternative or in addition, the structural elements may be partially manufactured from an elastic material such that the structural elements obtain a soundproofing effect.

By manufacturing the floor elements or parts thereof from plastic, wood or composite, the emission of greenhouse gases is reduced, since the extraction of sand for producing cement is no longer applicable.

The floor elements are preferably manufactured by an injection moulding process.

The structural elements are preferably hollow and provided with a central cavity. Each fitting opening of the floor elements is located along an axis of a structural element, thereby allowing access to the central cavity thereof, in such a way that, in the stacking position, the axis of each of the structural elements of a first said floor element coincides with an axis of each of the structural elements of a second said floor element. Here, the positioning of two floor elements in the stacking position means that the structural elements of the first floor element are pushed through the fitting openings of the framework of the second floor element into the central cavity of the structural elements of the second floor element.

The object of the invention is moreover also achieved by providing a floor construction comprising a floor assembly as described above, wherein a multiplicity of lower floor elements and a multiplicity of upper floor elements are positioned in the load-bearing position, wherein each lower floor element supports a plurality of upper floor elements, and wherein each upper floor element is supported on a plurality of lower floor elements.

Preferably, each lower floor element supports four upper floor elements and each upper floor element is supported on four lower floor elements. For example, the floor elements may be positioned in such a way that an overlap between a lower floor element and an upper floor element positioned partially thereon in each case accounts for one quarter of the surface of both floor elements.

The invention will be described in more detail below with reference to the attached figures, which show embodiments of the invention. However, the present invention may be embodied in many different forms and should therefore not be limited to the embodiments illustrated in the figures. It will be clear that the figures are intended to be schematic and purely illustrative. The dimensions do not necessarily correspond to those in reality and may have been exaggerated in order to improve understanding. As a result, the dimensions indicated in the figures should not be considered as limiting with regard to the scope of the claims.

• Figure 1 shows a schematic side view of one embodiment of a floor assembly according to the invention.

• Figure 2 shows a perspective illustration of the embodiment in Figure 1.

• Figure 3 shows a schematic side view of three lower floor elements according to the invention in the stacking position.

• Figure 4 shows a perspective illustration of the embodiment in Figure 3.

• Figure 5 shows a schematic side view of two floor elements according to the invention in the load-bearing position.

Figure 6 shows a perspective illustration of the embodiment in Figure 5. Figure 7 shows a top view of one embodiment of a framework of a floor assembly according to the invention.

• Figures 8, 9 and 10 show different embodiments of the invention with different covering floors.

• Figure 11 shows a schematic side view of a floor assembly according to the invention.

• Figures 12-21 show various steps for assembling a floor assembly according to the invention.

• Figures 22, 23 and 24 show the floor assembly in Figure 21 with different covering floors.

• Figure 25 shows a perspective illustration of a covering panel according to the invention.

• Figure 26 shows a perspective illustration of a floor heating panel according to the invention.

• Figures 27 and 28 show a perspective illustration of a floor assembly according to the invention.

• Figures 29, 30 and 31 show a detail of the floor elements according to the invention.

• Figure 32 shows a detail of a floor element.

Figure 1 shows a schematic side view of one embodiment of a floor assembly 1 according to the invention. The floor assembly 1 comprises a lower floor element 10 with a framework 11 and a multiplicity of structural elements 12. The framework 11 extends along a first plane A. The floor assembly 1 further comprises an upper floor element 30 with a framework 31 and a multiplicity of structural elements 32. The framework 31 extends along a second plane B.

Figure 2 shows a perspective illustration of the embodiment in Figure 1. The structural elements 12, 32 are hollow. The upper floor element 30 as illustrated in Figure 2 comprises a multiplicity of fitting openings 33. Here, the fitting openings 33 are each located at the top of one of the structural elements 32. The lower floor element 10 also comprises a multiplicity of fitting openings 13, which are not visible in Figure 2. The fitting openings 13, 33 are suitable for receiving a structural element 12, 32 of another floor element 10, 30 in order to position two or more floor elements 10, 30 in the stacking position. Figure 3 shows three lower floor elements 10 in the stacking position. The fitting openings 33 of the upper floor elements 30 may furthermore also be adapted for the installation for example of a socket therein.

As illustrated in Figures 1 and 2, the structural elements comprise cavities 20, 40. Figure 7 also shows that the framework 11 also comprises cavities 19. The framework 31 also comprises cavities 39, which are visible in Figure 2. These cavities 19, 20, 39, 40 lower the weight of the floor assembly 1 and improve the filling of the floor assembly 1 with filling material. Cavities 20, 40 divide the hollow structural elements 12, 32 into four legs. Due to the fact that the hollow structural elements 12, 32 do not have a closed shell surface, but rather have a shell formed by four legs which are separated by the cavities 20, 40, the structural elements 12, 32 retain a certain freedom of movement. The legs may bend slightly outwards. This improves the acoustic properties of the floor assembly 1. The cavities 20, 40 in the structural elements 12, 32 may also be provided such that here cables and/or pipes and/or lines can be led through them. In order to be able to provide such cables and/or pipes and/or lines with bends, it may be necessary to remove one or more legs of the structural elements between the cavities 20, 40. This makes it possible to also lay lines up to a said socket.

Figure 1 also shows that each structural element 12, 32 comprises a base portion 14, 34 near the framework 11, 31, an end portion 16, 36 near an end of the structural element 12, 32 facing away from the framework 11, 31, and a middle portion 15, 35 between the base portion 14, 34 and the end portion 16, 36. Due to the fact that the cross section of the cavities 20, 40 increases from the end portion 16, 36 towards the middle portion 15, 35 and from the base portion 14, 34 towards the middle position 15, 35, the middle portion 15, 35 has a lower specific weight than the base portion 14, 34 and the end portion 16, 36. As a result, the structural elements 12, 32 behave like I profiles in terms of the mechanics of materials. The structural elements 12, 32 thus have a relatively high bearing strength with respect to their weight.

Figure 2 illustrates that the structural elements 12, 32 consist of four upright walls with oblique flanks. As an alternative, the structural elements of the floor elements are conical structural elements.

The framework 31 illustrated in Figure 2 further comprises a multiplicity of adjustment openings 37 which in this case comprise an internal screw thread. The adjustment openings 17 of the framework 11 are not visible here. A number of end portions of structural elements 12, 32 are also provided with corresponding adjustment openings 17, 37 with an internal screw thread. The adjustment openings 17, 37 are suitable for receiving adjustment devices 2 and/or for receiving securing elements 49 (these adjustment openings then serving as securing openings), not illustrated here. The adjustment devices 2 and/or securing elements 49 then comprise a corresponding external screw thread.

The four comers of the framework 11, 31 are in this case each provided with a cutout 21, 41 with a portion of an internal screw thread. When four floor elements 10, 30 are correctly fitted in the load-bearing position in such a way that they share a comer, the four cutouts 21, 41 will together form an additional adjustment opening with an internal screw thread.

Analogously, the side edges of the framework 11, 31 are provided with a plurality of cutouts 22, 42 with a portion of an internal screw thread, in such a way that, after positioning, cutouts 22, 42 of laterally neighbouring floor elements 10, 30 together form an additional adjustment opening with an internal screw thread.

Figure 3 shows a schematic side view of three lower floor elements 10 in the stacking position. Figure 4 shows a perspective illustration of the three lower floor elements 10 in the stacking position in Figure 3. In the stacking position, the lower floor elements 10 are positioned one on top of the other in such a way that the structural elements 12 of the bottom two lower floor elements 10 extend into the fitting openings 13 of the top lower floor element 10. Here, the first planes A are parallel. Since here the fitting openings 13 are each located at the base of a structural element 12, the structural elements 12 thus extend into the structural elements 12 of the top lower floor element 10. This is illustrated, inter alia, by the projections 25 on the top side of the structural element 12, wherein the projections 25 of the other structural elements 12 are visible through the cavities 20 of the structural element 12. Figures 3 and 4 show three lower floor elements 10 in the stacking position. It will be clear that, when transporting the floor elements, the number of floor elements in the stacking position can be greater than three. In the stacking position, the floor elements form a compact unit, making them easy to transport.

Figure 5 shows a schematic side view of a lower floor element 10 and an upper floor element 30 in the load-bearing position. Figure 6 is a perspective illustration of the lower floor element 10 and upper floor element 30 in Figure 5. In the load-bearing position, the structural elements 12 of the lower floor element 10 extend between the structural elements 32 of the upper floor element 30. The first plane A is parallel to the second plane B. In this case, the walls of a structural element 32 of an upper floor element 30 are supported on the walls of a plurality of structural elements 12 of the lower floor element 10. This contact between a plurality of walls makes it possible for the floor assembly 1 to support a great force.

The floor assembly 1 may comprise a filling material (this is not illustrated in the figures) which is applied in the floor elements 10, 30. For this purpose, the floor elements 10, 30, which are in the load-bearing position, are filled with filling material which is applied through filling openings present in the upper floor element 30. In the embodiments shown in the figures, the fitting openings 33, the adjustment openings 37 and the cavities 39 in the framework 31 serve as filling openings. The filling material can spread out over the floor elements 10, 30 through the cavities 20, 40. Filling material may be used to improve the insulating properties of the floor assembly 1. More specifically, filling material may be used to obtain a higher insulation value of the floor assembly 1. As an alternative, during positioning, it is for example possible for the floor assembly to be closed in an airtight manner at the ground plane and at the floor plane and be provided with a blow-in opening at a first location and with a blow-out opening at another location, in order to be connected to a heat pump air-conditioning system for blowing hot air through the floor assembly so as to create floor heating, or cold air so as to provide cooling. It is thus possible to produce a floor heating and cooling system without floor heating pipes needing to be provided for this.

Figure 7 shows a top view of a detail of one embodiment of a framework 11, 31 of a floor assembly 1 according to the invention. As illustrated here, the framework 11, 31 of both the lower floor elements 10 and the upper floor elements 30 is constructed from a pattern consisting of a multiplicity of dodecagons, triangles and circles. For illustration purposes, one dodecagon 27, one circle 28, and two triangles 29 are indicated. Here, the dodecagons form the connection points between the structural elements 12, 32 and the framework 11, 31. Here, the circles form the majority of the adjustment openings 17, 37. The dodecagons are each connected on four of their sides to four adjacent circles. Each circle is in turn connected to four dodecagons. Here, the triangles form the remaining area of the framework between the dodecagons and the circles. Some triangles are provided with positioning direction indicators 24 in the form of an arrow 24. These arrows 24 indicate the direction in which the floor element 10, 30 must be positioned with respect to the other floor elements 10, 30. The positioning direction of the floor elements 10, 30 is important for the half and quarter screw threads which are present at the sides and the comers, respectively, of the floor elements 10, 30. Only if the floor elements 10, 30 are correctly positioned according to the positioning direction arrows 24 will the half and quarter screw threads form a usable screw thread together with the half and quarter screw threads adjacent thereto. The majority of the adjustment openings 17, 37 are provided in the circles between the dodecagons and the structural elements.

Some adjustment openings 17, 37 are provided in the dodecagons, on the end portions of the corresponding structural elements 12, 32, and comprise a serrated screw thread 26, 46. Figures 2 and 4 show how this serrated screw thread 26 is arranged on the end portion 16 of the structural element 12. In the load-bearing position, such a serrated screw thread 46 of an upper floor element 30 will be located flatly above an internal screw thread of an adjustment opening 17 of a lower floor element 10. In this way, it is possible to fit an adjustment device 2 which engages both into the adjustment opening 37 with the serrated screw thread 46 and into the adjustment opening 17 with a conventional screw thread. Due to the fact that the adjustment device 2 engages with both screw threads, loading on the upper floor element 30 is transferred to the adjustment device 2 via both the upper floor element 30 and the lower floor element 10. Figure 11 shows how, in the load-bearing position, a serrated screw thread 46 is positioned with respect to a (half) internal screw thread of an adjustment opening 17 of the lower floor element 10. Via the fitting opening 33, it is thus also possible to engage from the top side of the upper floor element 30 through the structural element 32 with the adjustment device 2 in order to adjust the height.

Due to the fact that the serrated screw thread 46 is serrated, the wall of the structural element 32 remains sufficiently flexible at this screw thread 46. A conventional screw thread approximates in particular the equivalent of rings of material that would be provided in the structural elements, which would render the structural elements more rigid at this screw thread.

Figures 8, 9 and 10 show different floor assemblies 1 each with a different covering floor. Figure 8 shows a floor assembly 1 with a covering floor 3, here a covering panel 3. Figure 9 shows a floor assembly 1 with a covering floor 3, here a floor heating panel 3. The floor heating panel 3 may be metal for better heat conduction, or may additionally be provided with a metal insert for providing better heat conduction. The floor heating panel 3 comprises floor heating guides 4 for receiving floor heating lines. Figure 10 shows a floor assembly 1 with a covering floor 3, here a floor heating panel 3. Here, in addition to floor heating guides 4, the floor heating panel 3 further comprises a floor heating cover 6 for closing the floor heating guides 4.

Figure 11 shows a perspective illustration of a floor assembly 1, one lower floor element 10 and two upper floor elements 30 being in the load-bearing position. Here, the structural elements 12 of the lower floor element 10 extend between the structural elements 32 of the upper floor elements 30. The upper floor elements 30 are supported on the lower floor element 10. The second planes B of the two upper floor elements 30 coincide. Here, the overlap between an upper floor element 30 and the lower floor element 10 is 50% of the area of the framework 31. The floor assembly 1 further comprises four adjustment devices 2, here pegs 2 provided with an external screw thread. Here, the pegs 2 are fitted to the internal screw thread of four adjustment openings 17 of the lower floor element 10.

Figures 12 to 21 show various steps for assembling a floor assembly 1 according to the invention. Figure 12 shows the result of a first step, in which an upper floor element 30 is partially click- fitted into a lower floor element 10. The overlap between the lower floor element 10 and the upper floor element 30 amounts to 1/4 of the area of the floor elements 10, 30. By virtue of the low weight of the floor elements 10, 30, the lower floor element 10 does not necessarily need to be positioned on a load-bearing surface.

Figure 13 shows the addition of a second lower floor element 10, also click- fitted into the upper floor element 30 with an overlap of 1/4. Figure 14 shows an addition of a third and a fourth lower floor element 10, both also click- fitted into the upper floor element 30 with an overlap of 1/4. The upper floor element 30 is now firmly click- fitted to four lower floor elements 10, in each case with an overlap of 1/4 of the area of the lower floor element 10. After this step, the floor assembly 1, now comprising five floor elements 10, 30, can be positioned on a load-bearing surface if this was not already the case from the first step. However, the floor elements 10, 30 are so light that the floor assembly 1 may possibly only be positioned on a load-bearing surface after it already comprises more than five floor elements.

Figure 15 shows the fitting of a first adjustment device 2, here a peg 2 provided with an external screw thread. The peg 2 is fitted through a fitting opening 33 of the upper floor element 30 into an adjustment opening 37 with a serrated screw thread 46 and into an adjustment opening 17 (not visible here) of the lower floor elements 10. The adjustment opening 17 into which the first peg 2 is fitted is formed here at four adjacent corners of the four lower floor elements 10. Each corner of a lower floor element 10 comprises a quarter of an internal screw thread, in such a way that the four corners together form a whole internal screw thread into which the peg 2 engages.

Figure 16 shows the fitting of four additional pegs 2. These four pegs 2 are fitted directly, from above, into adjustment openings 17 (not visible here) of the lower floor elements 10. Here, the adjustment openings 17 into which the pegs 2 are fitted are each formed on two adjacent sides of two lower floor elements 10. The sides of the lower floor elements 10 comprise a number of halves of an internal screw thread, in such a way that two adjacent halves of two adjacent lower floor elements 10 together form a whole internal screw thread into which the additional pegs 2 engage.

Figures 17 to 20 show a repetition of the steps carried out in Figures 12 to 16, wherein in each case a number of lower floor elements 10, a number of upper floor elements 30 and a number of pegs 2 are added to the floor assembly 1. The floor assembly 1 in Figure 20 ultimately comprises twelve lower floor elements 10, six upper floor elements 30 and fifteen pegs 2. No peg 2 is fitted between the two lower floor elements 10 at the bottom right of the floor assembly 1. It may be possible that a peg 2 cannot be positioned at some positions of the floor assembly 1. This is for example the case if there is an opening in the load-bearing surface, or if a cable or line is already running under the adjustment opening 17. In this case, a peg 2 can be fitted into one of the neighbouring adjustment openings 17. Due to the large quantity of adjustment openings 17, it is easy to use a neighbouring adjustment opening 17 if a specific adjustment opening 17 is not usable. It can thus be ensured that there are enough pegs 2 to support the floor elements 10, 30.

In this case, pegs 2 preferably engage through fitting openings 33 into adjustment openings 37 of an upper floor element 30 and into corresponding adjustment openings 17 of a lower floor element 10. In this way, pegs 2 can be provided with a height which may even correspond to the height of a corresponding structural element 32 in order to be able to set different heights with respect to an underlying surface, without these pegs 2 protruding above the floor plane. If, during adjustment, an adjustment over a greater height is required, even longer pegs 2 can also be provided. It is of course also possible for even shorter pegs 2 to be provided.

As an alternative, pegs 2 may also engage via adjustment openings 37 in the framework 31 of the upper floor element 30 into an adjustment opening 17 on a corresponding end portion of a corresponding structural element 12 of a lower floor element 10. Such pegs 2 should then be of longer design in order to be able to set the required heights. Here, that portion of the peg 2 which extends above the floor plane can be removed, for example by sawing it off. In order to avoid this sawing-off operation, it is also possible for a plurality of pegs 2 having different dimensions to be provided, such that it is possible, as desired, for a peg 2 having an appropriate dimension that will not extend above the floor plane to be installed.

Figure 21 illustrates the floor assembly 1 in Figure 20, the pegs 2 being rotated in such a way that a desired height between the floor plane and the load-bearing surface is achieved. If the pegs 2 still extend above the upper floor element 30 when this desired height is reached, part of the peg 2 can be removed, for example by sawing it off to the same height as the top side of the upper floor element 30. The floor assembly 1 now comprises a number of lower floor elements 10 which are only partially covered. These lower floor elements 10 possibly bear against a wall, as a result of which it is not possible to click- fit a complete upper floor element 30 into the lower floor elements. For this reason, a number of upper floor elements 30 may be made smaller by sawing in such a way that the lower floor elements 10 can be completely covered with partial upper floor elements 30. It is also possible to not allow all the lower floor elements 10 to adjoin such a wall, but rather to allow lower floor elements 10 to extend to a dimension that is smaller than the corresponding dimension of an upper floor element 30 to be fitted therein. This upper floor element 30 can then be tailored by sawing to this dimension up to the wall and be fitted into the upper floor elements 10 so as to extend up to the wall. Pegs 2 can then be fitted into adjustment openings 37 so as to adjoin the wall, in order to support the freely hanging portion of this upper floor element 30 on a side facing away from the lower floor elements 10. These pegs 2 are preferably fitted into adjustment openings 37 on an end portion of a structural element 32. A covering floor 3 which is fitted on top of the upper floor element 30 will then further strengthen the structure.

The floor assembly 1 may also be provided with acoustically damping feet, which may for example be manufactured from rubber, for fitting at the bottom of the pegs 2.

In order to be able to anchor the floor assembly 1 on an underlying surface after positioning, anchoring holes 50 are also provided in the lower floor elements 10. Such an anchoring hole 50 may, for example, be designed to correspond to window frame plugs in order to make simple anchoring possible. These anchoring holes 50 additionally also allow for example parquet to be adhesively bonded as covering floor on an upper floor element 30 by means of such anchoring holes 50.

Figures 22, 23 and 24 show the floor assembly 1 in Figure 21 with different covering floors 3. Figure 22 shows, similarly to Figure 8, a floor assembly 1 with metal floor tiles 3. Figure 23 shows, similarly to Figure 9, a floor assembly 1 with floor heating panels 3 with floor heating guides 4. Figure 24 shows, similarly to Figure 10, a floor assembly 1 with floor heating panels 3 with floor heating guides 4 and floor heating covers 6. In alternative embodiments, it is for example possible for OSB boards or plastics sheets or gypsum floor boards, such as of the fermacell type, or parquet mentioned above to be used as covering floor. Standard OSB boards may, for example, be secured to the upper floor elements 30 using screws, by making the screws for example engage into the framework 31. Said gypsum floor boards may, for example, be fitted loosely on the upper floor elements 30.

In the embodiment shown in Figures 12-24, the floor elements extend over the entire area of the floor assembly. As an alternative, there may be places in the floor assembly where no lower floor element is fitted or only a partial lower floor assembly is fitted, in such a way that a certain space is freed under the upper floor elements. This free space may, for example, be used to receive lines, pipes or other facilities under the floor assembly.

Figure 25 shows a perspective illustration of a covering panel 3 according to the invention. The covering panel 3 comprises a multiplicity of V-shaped grooves 47. By virtue of these grooves 47, a multiplicity of covering panels 3 can be easily stacked. The covering panel 3 is manufactured from plastic and is preferably only a few millimetres thick. The covering panel 3 thus has a lower volume and weight than for example the known OSB boards used to cover screed. The covering panel 3 is also provided with four cutouts 48 at the comer points of the covering panel 3. Via these cutouts 48, the covering panel 3 can be connected to the floor elements 10, 30 by means of a connecting element 49, here a connecting screw 49.

Figure 26 shows a perspective illustration of a floor heating panel 3 according to the invention. The floor heating panel 3 comprises floor heating guides 4 and a floor heating cover 6 for closing the floor heating guides. The floor heating panel 3 further comprises four cutouts 48 at the corner points of the floor heating panel 3. Via these cutouts 48, the floor heating panel 3 can be connected to the floor elements 10, 30 by means of a connecting screw 49.

Figures 27 and 28 respectively show a covering panel 3 according to Figure 25 and a floor heating panel 3 according to Figure 26, which are connected to the floor elements 10, 30 by means of a connecting screw 49.

Figures 29, 30 and 31 show a detail of the floor elements 10 according to the invention. The floor elements 10 comprises a multiplicity of linking elements 51 for linking together two or more floor elements 10. Figure 29 shows how a floor element comprises two linking elements 51 on an outer side of the framework 11. Figures 30 and 31 show how two adjacent floor elements 10 are linked together by two linking elements 51, one on each floor element 10, because the linking elements 51 engage into each other. The floor elements 30 may also comprise linking elements 51 having the same functionality as those of the floor elements 10. Such linking elements 51 may adopt different forms. In this way, the upper floor elements 30, on the one hand, and/or the lower floor elements 10, on the other hand, may be laterally coupled so as to form a continuous unit for transmitting forces. These linking elements 51 also simplify the positioning of floor elements 10, 30.

The floor elements 10, 30 are preferably also provided so as to be able to be positioned adjoining each other with play, such that, in the event of heat and cold, the floor assembly 1 can shrink and expand without any problems.

Figure 32 shows a detail of a floor element 10, 30. The framework 11, 31 comprises a click-fit element 52 near the adjustment openings 17, 37. This click-fit element 52 is provided so as to be click- fitted behind a projection 25 in the load-bearing position.

Claims

1. Floor assembly (1) designed to be positioned on a load-bearing surface, comprising lower floor elements (10), each comprising a framework (11) which extends along a first plane (A), wherein the framework (11) comprises a multiplicity of fitting openings (13), the lower floor elements (10) further comprising a multiplicity of structural elements (12) which are connected to the framework (11) and are upright with respect to the framework (11), upper floor elements (30), each comprising a framework (31) which extends along a second plane (B), wherein the framework (31) comprises a multiplicity of fitting openings (33), the upper floor elements (30) further comprising a multiplicity of structural elements (32) which are connected to the framework (31) and are upright with respect to the framework (31), wherein the lower floor elements (10) are provided so as to be able to be mutually fitted in a stacking position in which the first planes (A) are parallel and in which the structural elements (12) of a first said lower floor element (10) are fitted through the fitting openings (13) of a second said lower floor element (10) and in which the structural elements (12) of the first said lower floor element (10) and the structural elements (12) of the second said lower floor element (10) are upright with respect to the respective frameworks (11) on the same side, and wherein the upper floor elements (30) are provided so as to be able to be mutually fitted in a stacking position in which the second planes (B) are parallel and in which the structural elements (32) of a first said upper floor element (30) are fitted through the fitting openings (33) of a second said upper floor element (30) and in which the structural elements (32) of the first said upper floor element (30) and the structural elements (32) of the second said upper floor element (30) are upright with respect to the respective frameworks (31) on the same side, and wherein each lower floor element (10) and each upper floor element (30) is provided so as to be able to be mutually fitted in: a load-bearing position in which the first planes (A) coincide with the same ground plane and in which the second planes (B) coincide with the same floor plane, the ground plane and the floor plane being parallel, and in which the structural elements (12) of each lower floor element (10) are upright with respect to the respective framework (11) of this lower floor element (10) on a side opposite the side on which the structural elements (32) of each upper floor element (30) are upright with respect to the framework (31) of this upper floor element (30), and wherein said structural elements (12) of each said lower floor element (10) extend between said structural elements (32) of the upper floor elements (30), and wherein each said upper floor element (30) is supported on at least one said lower floor element (10), characterized in that the floor assembly (1) further comprises a plurality of adjustment devices (2) which are able to be fastened to said lower floor elements (10) and/or to said upper floor elements (30), wherein the adjustment devices (2) are suitable for adjusting, in the load-bearing position, a distance between the floor plane and the load-bearing surface.

2. Floor assembly (1) according to Claim 1, characterized in that the adjustment devices (2), in the load-bearing position, are adjustable from a side of the floor plane facing away from the load-bearing surface.

3. Floor assembly (1) according to Claim 1 or 2, characterized in that each upper floor element (30) comprises one or more adjustment openings (37) which extend through the floor plane, wherein each adjustment opening (37) is suitable for receiving an adjustment device (2).

4. Floor assembly (1) according to Claim 3, characterized in that the adjustment openings (37) and the adjustment devices (2) are provided in such a way that, after a said adjustment device (2) has been fitted in a said adjustment opening (37), the adjustment device (2) is adjustable via this adjustment opening (37).

5. Floor assembly (1) according to Claim 3 or 4, characterized in that the adjustment openings (37) and the adjustment devices (2) are provided in such a way that a said adjustment device (2) is able to be fitted through the floor plane into this adjustment opening (37).

6. Floor assembly (1) according to one of the preceding claims, characterized in that each adjustment device (2) is able to be adjustably fastened in a said adjustment opening (37) in order to fasten this adjustment device (2) to a said upper floor element (30).

7. Floor assembly (1) according to one of the preceding claims, characterized in that each lower floor element (10) comprises one or more adjustment openings (17), wherein each adjustment opening (17) is suitable for receiving an adjustment device (2).

8. Floor assembly (1) according to one of the preceding claims, characterized in that, in the load-bearing position, at least some of the structural elements (32) of a said upper floor element (30) are supported on said structural elements (12) of one or more said lower floor elements (10) in order to support a said upper floor element (30) on the at least one said lower floor element (10).

9. Floor assembly (1) according to one of the preceding claims, characterized in that the lower floor elements (10) and the upper floor elements (30) are click-fitted into each other in the load-bearing position.

10. Floor assembly (1) according to one of the preceding claims, characterized in that the lower floor elements (10) and the upper floor elements (30) are connected to each other by means of a connecting element (49) in the load-bearing position.

11. Floor assembly (1) according to one of the preceding claims, characterized in that, in each lower floor element (10), the structural elements (12) are arranged in a first row and in a second row which extends at an angle, which differs from a multiple of 180°, with respect to the first row.

12. Floor assembly (1) according to one of the preceding claims, characterized in that each upper floor element (30) comprises one or more filling openings, wherein the one or more filling openings are suitable for applying filling material in the floor assembly (1) in the load-bearing position.

13. Floor assembly (1) according to Claim 10, characterized in that the fitting openings (33) of each upper floor element (30) are designed to serve as filling openings.

14. Floor assembly (1) according to one of the preceding claims, characterized in that the floor assembly (1) further comprises at least one of the following: floor heating (3), covering floor (3), and a cable tray (3).

15. Floor construction comprising a floor assembly (1) according to one of the preceding claims, wherein a multiplicity of lower floor elements (10) and a multiplicity of upper floor elements (30) are positioned in the load-bearing position, wherein each lower floor element (10) supports a plurality of upper floor elements (30) and wherein each upper floor element (30) is supported on a plurality of lower floor elements (10).