EP3363961A1 - Storey ceiling structure and building made of wood - Google Patents

Abstract

A floor slab construction comprising a first lower wooden support (5) for supporting a floor slab, a first upper wooden support (5) for supporting a further floor slab and a first wooden support head (6) for introducing the forces of the floor slab into the first lower timber support (5). The first column head (6) rests on the first lower wooden support (5). The first upper wooden support (5) is supported directly on the first lower wooden support.

Description

Technical area

The invention relates to a wooden floor slab construction and a wooden building.

State of the art

It is known to make wooden buildings. In this case, floor slabs are usually placed on floor slab constructions. In general, the supports that carry the projectile, connected to a construct of transverse and / or longitudinal members, and placed on these transverse and / or longitudinal beams, the floor ceiling. But such constructions have a number of disadvantages.

If column-free rooms are desired, the wooden cross and side members must be adapted in thickness to the load to be supported. For column spacings of 8 by 8 meters, this would mean a thickness of the longitudinal and / or transverse beams of about 1 m. Due to the reduction in the height of the room caused by this thickness, such support distances in timber construction are not possible today with the wooden constructions of the prior art.

The construction of multi-storey buildings in timber construction is limited by the characteristics of the wood. The longitudinal and / or cross member lie on a lower support, while the upper support in turn rests on the longitudinal and / or cross member. However, the fiber direction of the longitudinal and / or transverse beams lies in the plane of the floor slab, ie at right angles to the columns. However, wood has the property of being very stable to longitudinal forces acting on the wood, but very weakly perpendicular to the grain. If there is now a support on a transverse and / or longitudinal beam, the entire force of the upper support is transmitted first to the transverse and / or longitudinal beams and only from there to the lower support. Thus, the by the upper support load to be supported limited by the transverse stability of the longitudinal and / or cross member. Multi-storey buildings multiply the weight of a column on the transverse and / or longitudinal beams. Therefore, an excessive number of floors in timber construction is not possible today.

Therefore, there are in the prior art no multi-storey buildings with large column distances whose support structures are also made of wood.

In the patent US915421 Therefore, a steel or reinforced concrete support structure is proposed for timber structures. The support structure has a modular construction of columns and columns made of steel or reinforced concrete to support the floors of timber structures. Thus, the loads of multi-storey buildings made of wood can be worn. However, this has the disadvantage that the support structure can not be made of wood.

DE2108524 discloses a support structure of steel, reinforced concrete or plastic.

Presentation of the invention

It is an object of the invention to find a wooden floor slab construction which allows large pillar distances and multi-storey buildings and which does not require steel or reinforced concrete elements.

According to the invention, this object is achieved with a floor slab construction. The floor slab construction has a first lower wooden support for supporting a floor slab, a first upper wooden support for supporting a further floor slab and a first wooden support head for introducing the forces of the floor slab into the first lower wooden support. The first column head rests on the first lower wooden column, and the first upper wooden column rests directly on the first lower wooden column.

According to the invention this is further solved by a building with such a floor slab construction.

This has the advantage that a column head of a floor slab can rest on a lower support, and at the same time the force of the upper support can be introduced into the lower support, without directing the force on the un-designed floor ceiling.

The task is further solved by a wooden component, preferably a plate. The wood component comprising at least a first wood layer having a first main fiber direction and at least one second wood layer parallel to the at least one wood layer having a second main fiber direction, wherein one of the two outermost wood layers of the layer is a first wood layer and the other of the two outermost wood layers of the layer is one second layer of wood is. Examples of such wooden components are the wooden components of the floor slab.

Such a wooden component has the advantage that it transmits the same force in both main fiber directions.

The problem is further solved by the column head described below alone.

The problem is further solved by the floor ceiling described below alone.

Further advantageous embodiments are specified in the subclaims.

In one embodiment, the first column head has a recess, and the first upper wooden support and / or the first lower wooden support is / are guided through the recess of the first column head, so that the first upper wooden support can be supported directly on the first lower wooden support. Through the recess it is achieved that the first column head can rest on the support in the edge region of the recess and, in spite of the closed floor slab, the upper one Support on the lower support rests directly through the recess, without the weight of the upper support acting on the floor ceiling.

In one embodiment, the first upper wood support and the first lower wood support are inserted into the recess of the first support head so that the first upper wood support is supported within the recess of the first support head directly on the first lower wood support. This has the advantage that stabilize the upper and lower support in the recess itself and an extra attachment of one of the supports is unnecessary.

In one embodiment, the first lower wood support is steppedly stepped on the side facing the first support head so that the first lower wood support is inserted into the recess of the first support head, and the first support head with the edge of the recess formed on the first lower step Wooden support rests.

In one embodiment, the first lower wooden support and / or the first upper wooden support has a major fiber direction perpendicular to the floor or surface side of the first support head. This has the advantage that the support is designed to be very stable in the direction of support.

In one embodiment, the first wooden support head has a first main fiber direction and a second main fiber direction, wherein the first main fiber direction and the second main fiber direction are perpendicular to each other and disposed in the plane of the floor slab. Due to the rectangular arrangement, forces in the plane of the column head or the floor slab can be optimally transmitted.

In one embodiment, the first column head has a plurality of wood layers, wherein in the plurality of wood layers, a first wood layer having the first main fiber direction alternates with a second wood layer having the second main fiber direction. By the alternating arrangement of the layers with the first and the second major fiber direction in the plane very stable plates are achieved, which can effectively transmit forces in the plane in all directions. This unites the functions of the longitudinal and transverse beams in the floor slab itself.

In one embodiment, the first wood layer has at least two wood elements adjacent to one another in the layer plane in the direction of the second main fiber direction, and / or the second wood layer has at least two wood elements adjacent to one another in the layer plane in the direction of the first main fiber direction, wherein the at least two wood elements are a wood layer a wood element of a first kind of wood and a wood element of a second kind of wood. The layering of different types of wood produces areas of the first type of wood, areas of the second type of wood and areas of the first and second types of wood.

In one embodiment, the first wood layer has three wood elements adjacent to one another in the layer plane in the direction of the second main fiber direction, and / or the second wood layer has three wood elements adjacent to one another in the layer plane in the direction of the first main fiber direction, wherein the three wood elements of a wood layer alternately form a wood element first type of wood and a wooden element of a second type of wood. This embodiment is particularly advantageous if in the middle of another type of wood, usually a more stable than to be used in the edge areas.

In one embodiment, the support head comprises at least a first region having a plurality of wood layers of a first species, at least a second region having a plurality of layers of wood of a second species and at least a third region having a plurality of layers of wood in which the first species and the second type of wood alternates, on.

In one embodiment, the recess is disposed in the second region, and the second species is more stable than the first species of wood. As a result, in the area of the recess, in which the forces concentrate the floor ceiling, using a more stable wood than in the perimeter areas. Thus, the use of expensive wood can be limited to the necessary area around the recess.

In one embodiment, the floor slab construction comprises the floor slab having the first pillar head and a secondary structure, the secondary structure comprising a plurality of wood layers, wherein in the plurality of wood layers a first wood layer having the first main fiber direction with a second wood layer having the second main fiber direction alternates.

In one embodiment, the layer thickness and / or the main fiber direction of the plurality of wood layers of the substructure corresponds to the layer thickness and / or the main fiber direction of the plurality of wood layers of the column head.

In one embodiment, the secondary structure is connected frontally with an end face of the column head.

In one embodiment, the secondary structure is arranged frontally spaced with a front side of the column head by a gap, and the substructure is connected to the support head via a filled in the gap adhesive layer.

In one embodiment, the uppermost layer of the column head has a major fiber direction that is perpendicular to the major fiber direction of the lowermost layer of the column head.

In one embodiment, the top layer of the substructure has a major fiber direction that is perpendicular to the major fiber direction of the bottom layer of the substructure.

In one embodiment, the floor slab construction comprises a second lower pillar, a third lower pillar, a fourth lower pillar, a second upper pillar resting on the second lower pillar, a third upper pillar resting on the third lower pillar, a fourth upper support lying on the fourth lower support, wherein the floor slab further comprises a resting on the second lower support second column head, resting on the third lower support third column head and resting on the fourth lower support fourth column head, wherein the secondary structure comprises four first auxiliary support members connecting two adjacent support heads and having at least one second sub-support member connecting the four first sub-support members forming a closed surface of the floor slab between the four first sub-support members.

In one embodiment, the column head forms a parallelepiped with two surface sides parallel to the first and second main fiber directions, with two end sides arranged parallel to the first main fiber direction and with two end sides arranged parallel to the second main fiber direction.

In one embodiment, the floor slab construction has the further floor slab on the upper columns.

Brief description of the figures

Fig. 1

eine Ansicht eines Gebäudes mit der erfindungsgemässen Geschossdeckenkonstruktion;

Fig. 2

einen Draufsicht eines Aufbaus einer Geschossdecke;

Fig. 3

eine dreidimensionale Ansicht eines Stützenkopfs der Geschossdecke;

Fig. 4A

eine Draufsicht des Stützenkopfs;

Fig. 4B

eine erste Seitenansicht des Stützenkopfs;

Fig. 4C

eine zweite Seitenansicht des Stützenkopfs;

Fig. 5

ein Schnitt durch eine Geschossdeckenkonstruktion;

Fig. 6

eine dreidimensionale Ansicht eines Teils der Geschossdecke auf einer Stütze mit einem ersten Ausführungsbeispiel der Nebentragteile;

Fig. 7

ein Schnitt durch eine Verbindung des Stützenkopfs mit dem ersten Ausführungsbeispiel eines Nebentragteils; und

Fig. 8

ein Schnitt durch eine Verbindung des Stützenkopfs mit einem zweiten Ausführungsbeispiel eines Nebentragteils.

The invention will be explained in more detail with reference to the accompanying figures, wherein show

Fig. 1

a view of a building with the inventive floor slab construction;

Fig. 2

a plan view of a structure of a floor ceiling;

Fig. 3

a three-dimensional view of a column head of the floor ceiling;

Fig. 4A

a plan view of the support head;

Fig. 4B

a first side view of the column head;

Fig. 4C

a second side view of the column head;

Fig. 5

a section through a floor slab construction;

Fig. 6

a three-dimensional view of a portion of the floor slab on a support with a first embodiment of the auxiliary support members;

Fig. 7

a section through a connection of the column head with the first embodiment of a secondary support member; and

Fig. 8

a section through a connection of the column head with a second embodiment of a secondary support member.

Ways to carry out the invention

Fig. 1 shows an example of a building 1 with a floor slab construction according to the invention. The building has a base plate 3, three storey ceilings 2 and an upper floor ceiling 4. Each floor 2 and 4 lies on at least one support 5. Preferably, but without limiting the invention, a floor slab 2 or 4 rests on at least four pillars.

Fig. 2 1 shows an exemplary embodiment of a floor slab 2. The floor slab 2 comprises a plurality of support heads 6, a plurality of first auxiliary support parts 7 and a plurality of second secondary support parts 8. The first auxiliary support parts 7 and the second auxiliary support parts 8 form a secondary structure of the floor slab 2.

Each column head 6 has a recess 9, which is formed, an upper support 5, which is arranged between the floor slab 2 and an overlying floor slab, directly on a lower support 5, which supports the floor slab 2, support. Direct support should mean that the force of the upper support 5 is mainly introduced into the lower support 5 and only a small or vanishing proportion of the force is introduced into the floor 2. This can be done by resting the upper support 5 on the underlying support 5 or by resting the upper support 5 on a wood transfer element having a main fiber direction parallel to the main fiber direction of the upper and lower support 5 and in turn rests on the lower support 5. As a result, weight of the upper floors can be transported directly over superimposed columns down to the foundation, without any of the floors 2 of the collected weight of the superposed floors must be able to resist. As a result, the load of a single support 5 is no longer limited to the resistance at right angles to the fibrillation of the floor slab, but only by the significantly higher resistance of the supports in the longitudinal direction of the fiberization.

Fig. 3 shows a three-dimensional view of the isolated from the floor slab 2 support head 6. The support head 6 forms a plate with two surface sides 10 and four end faces 11. In most cases, the surface of the surface sides 10 is greater than that of the end faces 11, but invention is not limited to this. The plate preferably forms a cuboid, ie the six sides 10 and 11 are perpendicular to the sides adjacent to you. However, the support head 6 can also form other plate shapes and also the end faces can be formed obliquely, concave or convex instead of rectangular.

The first minor carrying parts 7 in Fig. 2 are preferably also cuboid formed with two surface sides and four end faces. Each first auxiliary carrying part 7 connects two support heads 6. For this purpose, an end face of the first auxiliary carrying part 7 is connected to an end face 11 of one of the support heads 6. The end face 11 of a further column head 6 is also connected on the opposite end face of the secondary support member 7 on the front side of the first auxiliary support member 7. Each column head 6 is connected at two, three or four end faces 11 with the end face of a first secondary support member 7, depending on whether the column head 6, at a corner, at the edge or in the middle of the building or the floor ceiling. Thus, four support heads 6, which are each connected to four first auxiliary bearing parts 7 form a square or a rectangular plate whose center has a square or rectangular recess.

The second auxiliary bearing parts 8 are preferably also cuboid with two surface sides and four end faces. The recess between the four first auxiliary bearing parts 7 is closed by at least one second auxiliary bearing part 8. In Fig. 2 two second side support members 8 are used to close the recess. Every second secondary carrying part 8 in Fig. 2 thus connects with the four end faces of the front sides of three first auxiliary bearing parts 7 and the adjacent further second secondary support part. 8

The column head 6 is made of wood. The wood is preferably plywood, for example, cross laminated or veneered plywood, with wood fibers oriented differently in adjacent layers. Fig. 4A , B, C shows an example of a wood construction of the column head 6. Fig. 4A shows a plan view of the upper surface side 10 of the support head 6. Die Figs. 4B and 4C each show an end face 11 of the column head 6. In the Figs. 4B and 4C the layer structure of the column head 6 is easy to see. The support head 6 consists of alternating first layers 12 and second layers 13. The first layers 12 are made of wood with a first main fiber direction 14, the second layers 13 are made of wood with a second main fiber direction 15. Preferably, the first main fiber direction 14 and the second Main fiber direction 15 different directions. Preferably, the first main fiber direction 14 is arranged perpendicular to the second main fiber direction 15. The first and second main fiber directions 14 and 15 are both arranged in the plane of the layers. The main fiber directions 14 and 15 intersect the four end faces 11 and run parallel to the two surface sides 10. Preferably, each main fiber direction 14 and 15 are parallel to two end faces 11 and perpendicular to the remaining two end faces 11. By this construction, the column head can be used in both Direction of the first main fiber direction 14 as well as in the direction of the second main fiber direction 15 forces transmitted well.

Since all the forces have to be directed to the floor slab 2 to the support heads 6 and must be transported from there via the supports 5, the support heads 6, in particular the area of the support heads 6 are exposed to the recess 9 the highest forces within the floor 2. Therefore, the support head 6 is preferably solid. In the embodiment in FIGS. 4A, 4B, 4C the column head 6 is formed of two types of wood. Each layer consists of three juxtaposed wooden elements, which are in the respective main fiber direction 14 or 15 of the layer extend over the entire length of the support head 6 and are at right angles to the corresponding main fiber direction 14 or 15 of the layer next to each other. In this case, the outer two wooden elements of a layer of a first type of wood 16 are formed, and formed between the outer two wooden elements arranged central wood element of the same layer of a second type of wood 17. In Fig. 4A is the top layer of the support head 6, which is a first layer 12 to see. As described, the two outer wood elements consist of the first wood species 16 and the central wood element of the second wood species 17. The three wood elements of the uppermost layer each extend in the direction of the first main fiber direction 14 over the entire length of the support head 6 and are in the direction of the second Main fiber direction 15 arranged side by side. Fig. 4A also shows in dashed lines the wood elements of lying directly under the top layer second layer 13. Again, the two outer wood elements of the first wood 16 and the central wood element of the second wood 17. The three wood elements of lying below the top layer second layer 13th and all other second layers 13 each extend in the direction of the second main fiber direction 15 over the entire length of the support head 6 and thus at right angles to the wood elements of the uppermost layer and all other first layers 12. The three wood elements of the second layer 13 below the uppermost layer and all other second layers 13 are arranged side by side in the direction of the first main fiber direction 14. Thus, nine different areas are formed by the stratification described. Due to the central arrangement of the central wood element of each layer, a central region of the support head 6 is formed, in which all the central wood elements intersect, and thus consists exclusively of the second type of wood 17. Due to the central arrangement of the recess 9, the border of the recess 9 thus consists of the second type of wood 17. In the four corners are only wood elements consisting of the first type of wood 16 on top of each other, so that here form four areas, only from the first kind of wood 16 exist. In the four remaining areas, the wood types 16 and 17 change from layer to layer. If one now chooses the second type of wood 17 more stable than the first type of wood 16, it forms in the center of the Support head 6 in the region of the recess 9 greater stability than in the edge regions. Different types of wood can include not only different types of trees, but also different types of processing of the wood of the same tree species. For example, the first type of wood 16 may be spruce plywood, and the second type of wood 17 may be beech veneered plywood. Since beech is harder than spruce, the central area is more stable.

Fig. 5 shows a section through a support head 6 and through an upper and lower support 5. The lower support 5 has a cross section which is larger than the recess 9 of the support head 6. At the upper end of the lower support 5 reduces the cross section of the lower support 5 on the cross section of the recess or smaller. As a result, a step 18 is formed, on which the support head 6 can rest. To support the floor slab 2, the reduced cross-section of the lower support 5 is inserted into the recess 9 of the support head 6 until the support head 6 rests on the step 18. The upper support 5 also has a reduced cross-section at the bottom, which is also inserted into the recess 9 of the support head until the upper support 5 rests on the lower support. As a result, the weight force can be transmitted from the floor slab 2 via the step 18 to the lower support 5. At the same time, the weight of the upper support 5 can be transferred to the lower support 5 without additional load for the floor slab 2.

Fig. 6 shows an embodiment of a projectile level 2 with a lower support 5. In this embodiment, the first side support member 7 and the second side support member 8 has a hollow box structure of perpendicularly arranged transverse struts, which is covered at the top and bottom by at least one layer of wood. The at least one layer of wood on the top and bottom consists in this embodiment each of two layers, which are not shown here for better representation of the hollow box structure. The layers on and below the hollow box structure alternately have a first and a second layer each having a first main fiber direction 14 and a second main fiber direction 15. The layers on and under the Box body structure of the first and second side support members 7 and 8 are compared to the support head 6 formed so that the first layers opposite to the end faces of the support head 6 and the first or second side support member to be connected 7 or 8 and correspondingly also the second layers. Thus, the floor slab 2 in each layer on and below the hollow box structures of the first and second side support members 7 and 8 and the corresponding layer of the support head 6 over the entire plane of the floor slab 2, the same main fiber direction.

Fig. 7 shows a section through the junction between the support head 6 and the first auxiliary bearing member 7. The supporting frontal connection between an end face 11 of the support head 6 and an end face of the first auxiliary support member 7 is achieved by an adhesive layer 19.

Fig. 8 shows an alternative embodiment of the side support members 7 and 8. The first and second side support members 7 and 8 are made of solid wood, which alternately first layers 12 and second layers 13 has. The layers are respectively arranged identically in the support head 6, in the first auxiliary support part 8 and the second auxiliary support part 9, so that the layers of the same main fiber direction are opposite to the end sides of all the parts to be joined. Thus, the floor slab 2 in each layer has the same main fiber direction. Thereby, in each layer of the floor 2, the power is transferred to either the first main fiber 14 or the second main 15. The load-bearing end connection between an end face 11 of the support head 6 and an end face of the first auxiliary support part 7 is achieved by an adhesive layer 19.

The achievement of a bearing connection is achieved as follows. First, the end faces of the parts to be joined are arranged so that the layers facing the same main fiber direction and the parts to be joined form a gap between the end faces. In this position, the two parts to be joined are fixed. The gap between the parts to be joined is sealed at the edges, eg by filling. Thereafter, the gap of the gap 19 is filled with adhesive. When the adhesive has cured, there is a load-bearing connection. The adhesive used is preferably a two-component adhesive, the two components of which are mixed during filling into the gap 19. By mixing the two components, the adhesive begins to cure. For example, the adhesive PURBOND CR 421 from the Swiss company Purbond was tested as an adhesive. This two-component polyurethane casting resin is approved by the Deutsches Institut für Bautechnik under the approval number Z-9.1-707 for gluing steel rods into load-bearing timber components and is freely available. This adhesive measured a bond between two wooden elements with tensile strengths of up to 20 Newton per square millimeter (N / mm ² ). By this technique, the formation of large floor slabs 2 by the frontal bonding of support heads 6, secondary supporting parts 7 and 8 is possible, which distribute the force over the entire plane of the floor slab 2 evenly and transfer to the supports 5. Alternatively, the joint may be provided by alternative bonding means such as steel jointing means rather than by gluing.

Preferably, all parts of the floor slab 2, that is, the pillar heads 6, the first minor supporting parts 7 and the second minor supporting parts 8, are constructed so that the uppermost layer has a main fiber direction perpendicular to the main fiber direction of the lowermost layer. In the prior art, the top and bottom layers are always formed with the same main fiber direction, otherwise the plates warp. However, this has the disadvantage that the plates in the main fiber direction of the top and bottom layers are more stable than in the other of the two main fiber directions of the plate. Therefore, the disadvantage of warping the plates is intentionally taken into account here in order to provide plates which are equally stable in both main fiber directions.

Due to the floor slab construction according to the invention for a floor slab 2, the force can now be applied to a floor slab 2 in the plane of the floor slab 2 itself and not via separate supports in one Support 5 are introduced and at the same time the forces of the upper floors of the upper support 5 are introduced directly to the lower support 5. By using the floor slab 2 itself as a force-transmitting element, eliminating additional support for the floor slab 2 and the floor slab 2 can be made thinner than a corresponding support. This construction enables floor slabs 2 to be achieved with column spacings of eight by eight meters. The floor slab 2 preferably forms a plate of the same thickness over the entire plane of the floor slab, which itself acts as a supporting element for the floor slab 2 and requires no additional supporting support.

As used in this application, the terms below or above refer to the gravitational pull at the bottom and upward toward the gravitational pull.

In the described embodiment, the first and second main fiber directions 14 and 15 of the adjacent layers of the elements of the floor slab were perpendicular to each other. Other angles between the major fiber directions and a greater number of major fiber directions could also occur. Thus, the three different layers could have major fiber directions, each at 60 ° to each other, so that power transfers in the projectile plane would work along three directions. Thus, the forces could possibly be better directed to the column head. However, such constructions are more complicated.

The invention is not limited to the described embodiment. Each embodiment included in the wording of the independent claims is included in the invention.

Claims (15)

A wooden member comprising at least a first wood layer (12) having a first main fiber direction (14) and at least one second wood layer (13) parallel to the at least one first wood layer (12) and having a second major fiber direction (15) different from the first main fiber direction the two outermost layers of wood of the layering is a first layer of wood (12) and the other of the two outermost layers of wood of the layering is a second layer of wood (12). The wood component according to claim 1, wherein the first main fiber direction (14) and the second main fiber direction (15) are perpendicular to each other. Wood component according to claim 1 or 2 comprising a plurality of wood layers (12, 13), wherein in the plurality of wood layers, the first wood layer (12) alternates with the second wood layer (13). Timber component according to one of the preceding claims, wherein the timber component is a plate. Timber component according to one of the preceding claims, wherein the timber component consists of cross-laminated timber. Timber component according to one of the preceding claims, wherein the timber component is designed to form at least a part of a floor slab (2). Timber component according to the previous claim, wherein the timber component is a column head (6) or a secondary structure of a floor slab (2). Timber component according to one of the preceding claims, wherein the first wood layer (12) at least two in the layer plane in the direction of the second main fiber direction (15) adjacent wood elements and / or the second wood layer (13) has at least two wood elements juxtaposed in the layer plane in the direction of the first main fiber direction (14), the at least two wood elements of a wood layer comprising a wood element of a first wood type (16) and a wood element of a second wood type (16). 17). Wooden component according to one of the preceding claims, comprising
at least a first region having a plurality of wood layers of a first kind of wood (16),
at least one second area having a plurality of wood layers of a second kind of wood (17) and
at least a third region having a plurality of layers of wood in which the first kind of wood (16) and the second kind of wood (17) alternate. Floor slab comprising at least one timber component according to one of the preceding claims. Floor slab according to the preceding claim, wherein the first main fiber direction (14) and the second main fiber direction (15) in the plane of the floor slab (2) are arranged. Floor slab according to claim 10 or 11, wherein a first wooden component of the at least one wooden component is a column head (6) and at least one second wooden component of the at least one wooden component is a secondary structure. Building comprising a floor slab (2) according to one of claims 10 to 12. Building according to claim 13, comprising a lower wooden support (5) for supporting the floor slab (2), an upper wooden support (5) for supporting a further floor slab (2, 4), wherein a wooden component of the at least one wooden component of the slab floor is a column head (6). for introducing the forces of the floor slab (2) into the lower wooden support (5), wherein the support head (6) on the lower Wooden support (5) rests, and the upper wooden support (5) is supported directly on the lower wooden support. A floor slab comprising a layer of at least two parallel wood layers (12, 13), the uppermost wood layer of the floor slab (2) having a first main fiber direction (14) and the lowermost wood layer of the floor slab (2) a second main fiber direction different from the first main fiber direction (14) (15).

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