Gable-shaped connection, gable-shaped connectable joining part and the production thereof, method for connecting joining parts, use of a gable-shaped connection for connecting joining parts, and multi-part connected component

Abstract

The present invention relates to a gable connection for connecting a first joining part (11) having a negative gable-shaped portion, and a second joining part (12) having a positive gable-shaped portion. The negative gable-shaped portion and the positive gable-shaped portion each comprise at least one step (30) having a joining surface. The gable-shaped portions are designed to be complementary in such a way that the positive portion can protrude at least partially into the negative portion, forming at least one joint (20) between the joining surfaces, which at least one joint (20) is at least partially filled with a filler. For sufficient hold, the joining surfaces have unevennesses of the order of magnitude from 1 μm to 10 mm and / or, in plan view, the height and width of the at least one step (30) are at an angle α ≥ 90° to one another. The invention further relates to gable-connectable joining parts and to the production thereof, to a method for connecting joining parts, and to a use of a gable connection for connecting joining parts, in particular made of FRC concrete slabs.

Description

[0001]Gable connection, gable-connectable joining part and its production, method for connecting joining parts, use of a gable connection for connecting joining parts, and multi-part joined component. The present invention relates to a gable connection for connecting joining parts, a gable-connectable joining part and its production, a method for connecting joining parts, and a use of a gable connection for connecting joining parts. Traditional reinforced concrete ceilings have been used in building construction to date. Due to their steel reinforcements, they can absorb not only high compressive forces but also high tensile forces, making them particularly stable. Unfortunately, reinforced concrete ceilings also require a large amount of raw materials, particularly concrete, and also have a high dead weight.Even the initial construction of such a reinforced concrete slab on site does not always run smoothly due to its dependence on the prevailing weather conditions. Frost, extreme heat, or heavy rainfall can affect the setting process of the concrete and thus influence the quality of the reinforced concrete slab, which is why weather conditions must be taken into account during its construction. An alternative to conventional reinforced concrete in the form of FRC slabs (FRC = Fiber Reinforced Concrete) is already known from WO2014 / 040653 A1. Here, an FRC slab, which can absorb P220116 PCT compressive and tensile forces comparable to reinforced concrete slabs, can be manufactured with significantly lower material consumption—and thus also dead weight—off-site rather than on the construction site.The size of the FRC panels is essentially limited by the transport of the panels from the production site to the construction site, which in turn is reflected in the maximum size of an FRC ceiling. In order to overcome this limitation, among other things, the present invention has set itself the object of providing an alternative connection for joining parts. A further object of one aspect of the present invention is to provide a gable-connectable joining part. A still further object of one aspect of the present invention is to provide an alternative method for joining parts. A still further object of a still further aspect of the present invention is to provide a use of a gable connection for connecting parts.Yet another object of a further aspect of the present invention is to provide a multi-part component, in particular a concrete component. The joining parts can be, for example, concrete joining parts and in particular FRC joining parts. P220116 PCT The object of providing an alternative connection is achieved by a gable connection according to claim 1. Said gable connection comprises a first joining part with an upper side and a negative gable-shaped section, which negative gable-shaped section represents a recess. Furthermore, the gable connection comprises a second joining part with an upper side and a positive gable-shaped section, which positive gable-shaped section represents a projection. The negative gable-shaped section and the positive gable-shaped section each comprise at least one step.Furthermore, the negative gable-shaped section and the positive gable-shaped section each have joining surfaces aligned with one another along at least one step. Furthermore, the negative gable-shaped section and the positive gable-shaped section are designed to be complementary in such a way that the positive gable-shaped section can at least partially protrude into the negative gable-shaped section. In the connected state, the positive gable-shaped section protrudes at least partially into the negative gable-shaped section in such a way that one or more joints are formed between at least a portion of the joining surface of the negative gable-shaped section and a portion of the joining surface of the positive gable-shaped section. The one or more joints are at least partially filled with a filler.Furthermore, at least a portion of the joining surface of the negative P220116 PCT and the positive gable-shaped section has unevenness in the range of 1 µm to 10 mm. Alternatively or additionally, at least one of the at least one step of the first joining part has a width, a height, and an angle α, viewed from its upper side. Alternatively or additionally, at least one of the at least one step of the second joining part has a width, a height, and an angle α, viewed from its upper side. The angle α is greater than or equal to 90°, in particular greater than 90°, further in particular greater than 90° and less than or equal to 110°, so that the height and width of the at least one step are non-orthogonal to one another in the plan view of the upper side, and the at least one step tapers along its height and with increasing distance from its width.The term "gable" originally comes from house construction and refers to the triangular surface in the roof structure. This refers to the wall section whose upper corner is the roof ridge and whose sides are the roof edges. The lower end of the gable triangle is the cross connection of the lower corners of the roof edges. This definition can ultimately be modified and applied to a joining part with a basic structure on which a projection is arranged, forming the gable. Although the gable-shaped section according to the invention is not necessarily triangular, but can also have a different geometry, it is advantageous if the gable-shaped section ("gable" can be used as a synonym P220116 PCT) widens towards the basic structure, which can be understood figuratively as "triangular," i.e., narrow at the top and wide at the bottom.Conversely, these considerations also apply to the negative gable-shaped section, which, however, does not protrude from the basic structure but rather protrudes into it, essentially "eating" material out of it. If the gable-shaped section comprises only one step, it can, for example, have a rectangular shape, e.g., a square shape, or even the shape of a trapezoid, when viewed from above onto the top side of the joining part, either as a projection (= positive) or as a recess (= negative). The term "step" also originates from the field of house construction and usually refers to an individual part of a staircase used for ascending or descending. The step essentially comprises two adjacent surfaces: a tread and a rising surface, which creates the difference in height. For the purposes of the invention, the tread corresponds to the width of the step when viewed from above onto the top side of the joining part, and the rising surface corresponds to the height of the step.If there is more than one step in a gable-shaped section, the result is a stepped gable, also known as a stepped gable, staggered gable, or cat-step gable. The number of steps on the left and right hand side of the gable-shaped section can be identical, there may even be mirror symmetry, or the number of steps on the left and right hand side can differ, which means there is no longer any mirror symmetry. One or more joining surfaces extend along the height and / or width of the steps, or in P220116 PCT construction jargon, along the tread and / or the rising surface. The joining surface(s) of the negative and positive gable-shaped sections face each other, i.e., are aligned with one another. A single connected joining surface can form along the steps, but there can also be several individual, non-connected joining surfaces. For example, if...If the positive gable-shaped section extends into the negative gable-shaped section in such a way that direct contact occurs in some places, these "contact surfaces" are not considered part of the joining surface(s), since contact at that point does not create a joint into which filler can be poured. The term "complementary" is to be strictly understood as "opposing but complementary properties of an object." The negative and positive gable-shaped sections are such opposing objects (recess vs. projection) that complement each other in that they can be inserted into one another and, together with the joint or the filler filling the joint, form a complete or complementary new object.It is important within the meaning of the invention that the complementary connection is not designed so tightly that, when the negative and positive gable-shaped sections are at least partially inserted into one another, there is only a contact surface and no joining surface, i.e., no joint remains. A suitable filler material could be a binding agent such as adhesive or mortar, but also sand. Furthermore, the joint can be filled, for example, by attaching a barrier, for example in the form of a small board (e.g., P220116 PCT wedge-shaped), which is driven into the joint from the top side of the joining parts and reduces it in such a way that the joining parts are "wedged." For better adhesion of the gable connection, the joining surface(s) can be roughened or roughened, i.e., not smooth. A non-smooth surface is noticeable by a microstructure on the surface, which shows irregularities in a size of, for example, 1 µm up to 10 mm.Further examples of the magnitude of unevenness include:- 1 µm to 5 mm;- 1 µm to 2 mm;- 1 µm to 1 mm;- 1 µm to 500 µm;- 1 µm to 100 µm;- 1 µm to 10 µm;- 1 mm to 10 mm;- 1 mm to 5 mm;- 500 µm to 2 mm;- 100 µm to 1 mm;- 100 µm to 500 µm;- 50 µm to 100 µm;- 100 µm to 2 mm;- 200 µm to 5 mm.The angle α, which indicates how the "tread" and the The distance between the "rising surface" of a step can be 90° or more. At an angle α greater than 90°, the "climbing surface" slopes towards the "treading surface". Further examples of a range of angle α include: -90° ≤ α ≤ 120°; - 90° ≤ α ≤ 110°; - 90° ≤ α ≤ 105°; - 90° ≤ α ≤ 100°; - 90° ≤ α ≤ 98°; - 90° ≤ α ≤ 95°; - 90° ≤ α ≤ 93°; - 90° ≤ α ≤ 92°; - 90° < α ≤ 120°; - 90° < α ≤ 110°;- 90° < α ≤ 105°;- 90° < α ≤ 100°;- 90° < α ≤ 98°;- 90° < α ≤ 95°;- 90° < α ≤ 93°;- 90° < α ≤ 92°;- 95° < α ≤ 120°;- 93° < α ≤ 110°;- 92° < α ≤ 105°;- 91° < α ≤ 100°;- 91° < α ≤ 98°;- 91° < α ≤ 95°;- 90.5° < α ≤ 93°; - 90.1° < α ≤ 92°.P220116 PCTIn one example, the angle α of the at least one step of the first joining part and the at least one step of the second joining part is "substantially" identical with respect to the aligned joining surfaces. The angle can actually be exactly the same. However, since the strengthening effect of the connection occurs even with a certain deviation, the term "substantially" encompasses a certain range. For example, it is advantageous if the angle α of the at least one step of the first joining part and the angle α of the at least one step of the second joining part deviate from each other by a maximum of 5°, in particular a maximum of 2°, further in particular a maximum of 1°. The presence of unevenness or an angle α > 90° is sufficient to give the gable connection sufficient stability under tension or pressure on or in the plane of the joining parts.The unevenness does not necessarily have to be specially manufactured / created, but can already be inherently present in the porosity of the concrete of a concrete joining part. In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, provided they do not contradict each other, the mutually aligned joining surfaces of the negative and positive gable-shaped sections represent at least partially substantially parallel planes that are inclined relative to the upper side of the joining parts. Where the angle α indicates the extent to which the "rising surface" is inclined toward the "tread surface" of the step, the angle β indicates whether the "rising surface" and / or the "tread surface" are tilted or inclined relative to the upper side of the joining part. If the "climbing surface" and "treading surface" are at an angle of β = 90° to the upper side, the joining surfaces do not represent inclined planes.However, if the angle β is ≠ 90°, the joining surfaces are represented by inclined planes at the location. If the joint to be filled or filled with filler is bounded by two inclined planes, which are ideally also essentially parallel to each other, the joint holds particularly well and the gable connection is strengthened. "Essentially" parallel, in the context of the invention, means that the inclined planes of the aligned joining surfaces do not have to be strictly parallel to each other; rather, the strengthening effect of the connection also occurs when the angle β of the first joining part and the second joining part deviate in the same direction from 90°, i.e., both angles β are either greater or less than 90°. Ideally, the difference between the angle β of the first joining part and the second joining part is a maximum of 5°, in particular a maximum of 2°, and further in particular a maximum of 1°.Beispiele für einen Bereich des Winkels β sindeinschliesslich: -90° < β ≤ 120°; P220116 PCT. - 90° β ≤ 110°; - 90° < β ≤ 105°;- 90° < β ≤ 100°;- 90° < β ≤ 98°;- 90° < β ≤ 95°;- 90° < β ≤ 93°;- 90° < β ≤ 92°;- 95° < β ≤ 120°;- 93° < β ≤ 110°;- 92° < β ≤ 105°;- 91° < β ≤ 100°;- 91° < β ≤ 98°;- 91° < β ≤ 95°;- 90.5° < β ≤ 93°;- 90.1° < β ≤ 92°- 60° ≤ β < 90°;- 70° ≤ β < 90°;- 75° ≤ β < 90°;- 80° ≤ β < 90°;- 82° ≤ β < 90°;- 85° ≤ β < 90°;- 87° ≤ β < 90°;- 88° ≤ β < 90°;- 60° ≤ β < 85°;- 70° ≤ β < 87°;- 75° ≤ β < 88°;- 80° ≤ β < 89°;- 82° ≤ β < 89°;- 85° ≤ β < 89°; - P220116 PCT - 89.9°.Particularly in the case of loads caused by transverse forces, i.e. bending, an angle β ≠ 90° additionally stabilizes the gable connection. In general, however, tensile loads are higher than bending loads, especially in building construction, which means that the roughness of the surface of the joining surface or an angle α > 90° plays a more relevant role. In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the negative gable-shaped section and the positive gable-shaped section each comprise at least a first and a second step. From the top side of the first joining part or the second joining part, the first and the second step have a width or a left width and a right width, as well as a left height and a right height. The planes inclined relative to the top side of the joining parts are, for example,arranged along the width of the first step and / or along the left width of the second step and / or along the right width of the second step and / or along the left height of the first step and / or the right height of the first step and / or the left height of the second step and / or the right height of the second step. P220116 PCT In one example, all joining surfaces along the entirety of the two steps are represented by inclined planes. In another example, which enables easier production of the joining parts, only the joining surfaces along the height of the steps are designed as inclined planes. In yet another example, it is exclusively the joining surfaces along the width of the two steps that are represented by inclined planes. One possibility for producing the inclined planes is, for example, sawing the positive gable-shaped section orsawing out the negative gable-shaped section using a wider saw blade with a thickness of, for example, 1 cm to 3 cm, in particular of 1.5 cm to 2.5 cm. In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, provided they do not contradict each other, the aligned joining surfaces of the negative and positive gable-shaped sections represent at least two pairs of planes that are partially essentially parallel to each other and inclined relative to the upper side of the joining parts. The inclined planes of one pair are preferably aligned opposite to the inclined planes of the other pair. In an example in which the gable-shaped sections are designed in two stages and, for example,If an inclined plane were located along the height of the steps of the negative and positive gable-shaped sections as the joining surface P220116 PCT, there would be two areas on the left and right hand sides in which the joining surfaces are inclined planes, thus creating four such pairs. For example, the pair arranged at the height of the first step can be inclined with an angle β > 90° (e.g., 93°), and the pair arranged along the height of the second step with an angle β < 90° (e.g., 88°), so that the orientation alternates from pair to pair.In an inventive embodiment of the gable connection, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, provided they do not contradict each other, the aligned joining surfaces of the negative and positive gable-shaped sections represent an even number of pairs of partially substantially parallel planes that are inclined relative to the upper side of the joining parts. The inclined planes of one half of the pairs are oriented opposite to the inclined planes of the other half of the pairs. In particular, as already given in the example in connection with the embodiment mentioned directly above, they are oriented alternately in pairs, so that the inclined planes of adjacent pairs are oriented opposite to each other.In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the at least one step of the first joining part and the at least one step of the second joining part have, as viewed from the top side of the first joining part or the second joining part, a width or a left width and a right width, as well as a left height and a right height. The unevennesses are formed along the joining surface of the negative gable-shaped section, which joining surface extends along one width or the left width and / or the right width of the at least one step. Alternatively or additionally, the unevennesses are formed along the joining surface of the negative gable-shaped section, which joining surface extends along the left height and / or the right height of the at least one step.Alternatively or additionally, the unevennesses are formed along the joining surface of the positive gable-shaped section, which joining surface extends along one width or the left width and / or the right width of the at least one step. Alternatively or additionally, the unevennesses are formed along the joining surface of the positive gable-shaped section, which joining surface extends along the left height and / or the right height of the at least one step.In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory thereto, the P220116 PCT positive gable-shaped section comprises n steps, where n is a natural number, in particular a number from 2 to 20 inclusive, further in particular from 4 to 12 inclusive, and again further in particular from 5 to 9 inclusive.In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the negative gable-shaped section comprises n steps, where n is a natural number, a number in particular from 2 to 20 inclusive, further in particular from 4 to 12 inclusive, and again further in particular from 5 to 9 inclusive. In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the number of steps of the positive gable-shaped section is identical to the number of steps of the negative gable-shaped section.In an embodiment of the gable connection according to the invention, which can be combined with any of the P220116 PCT and already mentioned embodiments to be mentioned, provided they do not contradict each other, the positive gable-shaped section projects into the negative gable-shaped section in such a way that at least n / 2 of the n steps of the positive gable-shaped section project completely into the negative gable-shaped section. In particular, at least 3 / 4 n of the n steps of the positive gable-shaped section and, more particularly, n-1 of the n steps of the positive gable-shaped section project completely into the negative gable-shaped section. The greater the proportion of the positive gable-shaped section that projects into the negative gable-shaped section, the more stable the gable connection. Ideally, however, the projection is not so complete orThe geometry of the complementary gable sections within the meaning of the invention is selected such that a joint is formed along the entire height of the lowest step of the positive gable section (optimally on the left and right hand sides). In an inventive embodiment of the gable connection, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, provided they do not contradict each other, n-1 of the n steps of the positive gable section extend completely into the negative gable section. The lowest step of the positive gable section extends at least partially, in particular half of its height, and further, in particular three-quarters of its height, into the negative gable section.In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, provided they do not contradict each other, the gable connection has a total width and a total height. The total height is greater than the total width, in particular by a factor of 1.05 to 5 inclusive, further in particular by a factor of 1.05 to 3 inclusive, further in particular by a factor of 1.05 to 2 inclusive. A corresponding ratio of total height to total width leads to a particularly stable gable connection. However, the ratio should not be too extreme (e.g., factor 10), since otherwise, in the case of joining parts = FRC plates, the reinforcements could be separated more easily if tension is applied in the direction of the width of the steps.In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the first joining part and the second joining part are three-dimensional objects with the dimensions of height, width, and thickness. The thickness represents the smallest dimension of the three dimensions, with the joining surfaces extending along the thickness. The first joining part and the second joining part are, in particular, concrete slabs, more particularly FRC slabs. One embodiment of the FRC slab is, in turn, the CPC slab. The letters "FRC" in FRC slabs stand for "Fiber Reinforced Concrete." FRC slabs are described, among other things, in WO2014 / 040653 A1, the content of which is to be understood as part of the disclosure of the present application. FRC slabs are filled with fibers, for example,made of carbon, glass, Kevlar, basalt, steel, natural fiber or the like, whose cross-sectional area is less than 5 mm. 2and have a thickness of a few centimeters (e.g., 1 cm to 10 cm). The width and length, in turn, range from a few meters (1 m, 2 m, ..., 5 m, etc.) to 10 m or even 20 m to 40 m. The reinforcement of the slabs can be based on different spacing and arrangements of the fibers relative to one another. Further details can be found in WO2014 / 040653A1. Since the fibers used have very high tensile strength and preferably do not corrode, they can be used to produce particularly load-bearing, thin concrete slabs. The reinforcement cover of three to four centimeters required for conventional reinforced concrete slabs is no longer necessary. In comparison, FRC slabs are therefore significantly thinner and have a lower weight – yet have the same load-bearing capacity. A special type of FRC slab is the CPC slab. The letters "CPC" stand for "carbon prestressed concrete" and describe the slabs made with thin prestressedCarbon strand-reinforced concrete slabs, which can be used according to the invention and are particularly delicate yet resilient, such as P220116 PCT. A special feature of the CPC slabs is that, thanks to the prestressing by the fibers, they remain extremely rigid even under pure tensile loads and crack-free under service load. This is particularly advantageous when used as a base structure. Even when used as a slab, they can absorb extremely high shear forces without cracking in service while maintaining high rigidity. Typical FRC slabs used for concrete slab elements are between 10 and 100 mm thick, particularly between 20 and 60 mm, e.g., 25 mm or 30 mm, especially 40 mm with regard to fire protection, and feature, for example, a four-layer CFRP reinforcement. In terms of expansion, the FRC slabs can have lengths and widths of several meters. For example, 1 mx 2 m, 2 mx 2 m, 2 mx 4 m up to 20 mx 40 m. A maximum width of 2.4 m is preferred, as this still allowsProblem-free road transport is possible. However, a width of up to 3.5 m or even 6 m is also possible, although transport conditions may be more difficult. The length of the FRC panels is preferably determined by the floor area of ​​the rooms to be spanned or the building dimensions and typically ranges from approximately 4 m or 5 m up to 12 m or even 20 m. The underside and the top side of an FRC panel are usually identical. In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments mentioned below and already mentioned, provided they do not contradict each other, a continuous joint is formed between the joining surface of the positive gable-shaped section and the joining surface of the negative gable-shaped section. In general, the more joining surface, the more stable the gable connection. If a continuous joint is formed, the entire surface along the stepsused as a joining surface, whereby an optimal joint between the joining parts is achieved. In an embodiment of the gable connection according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the overlap height of the joint of the at least one step, which results from the height of the at least one step of the first joining part less the height of the joint of the at least one step, is at least as large as or, in particular, by a factor of 1.5 to 5.0 inclusive, further in particular by a factor of 2.0 to 3.0 inclusive or even 3.0 to 4.0 inclusive, greater than the width of the joint of the at least one step. If the overlap height is at least as large as the width of the joint, the gable connection is further strengthened. If the width of the joint is smaller than the overlap height, a type of predetermined breaking point is created in the connection, otherwise theConnection fails under excessive load. P220116 PCT In an inventive embodiment of the gable connection, which can be combined with any of the yet-to-be-mentioned and already-mentioned embodiments, unless contradictory, the negative gable-shaped section and the positive gable-shaped section have the same number of steps. Alternatively or additionally, the negative gable-shaped section and / or the positive gable-shaped section are mirror-symmetrical. The plane of symmetry runs centrally (with respect to the width of the first step) through the gable-shaped section from the top to the bottom (virtually parallel to the thickness) of the joining part. The further object of an aspect of the present invention of providing a gable-connectable joining part is achieved by a joining part according to claim 15. Said gable-connectable joining part is in particular a concrete slab, further in particular an FRC slab, furtherin particular a CPC plate. The gable-connectable joining part has a top side and comprises at least one negative gable-shaped section, which represents a recess, or at least one positive gable-shaped section, which represents a projection. The negative gable-shaped section or the positive gable-shaped section each comprise at least one step. In particular, they each comprise 2 to 20, more particularly 4 to 12, and again more particularly 5 to 9, steps. The negative gable-shaped section or the positive gable-shaped section each have a joining surface along the at least one step. At least part of the surface of the joining surface of the negative or positive gable-shaped section has unevenness in the order of 1 µm to 10 mm. Further ranges of this order of magnitude have already been described in connection withThe gable connection is disclosed and, of course, applies equally to the gable-connectable joining part. Alternatively or additionally, at least one of the at least one step has a width, a height, and an angle α, viewed from the top side of the joining part, which angle α is ≥ 90°, so that the height and width of the at least one step are not orthogonal to each other and the at least one step tapers along its height and with increasing distance from the width. Examples and ranges for the angle α have already been disclosed in connection with the gable connection and, of course, apply equally to the gable-connectable joining part. Alternatively or additionally, the joining surface of the negative or positive gable-shaped section at least partially represents a plane inclined relative to the top side of the joining part. Examples and ranges for the angle β, the indicator of the "inclination" of the plane, have already been disclosed in connection with the gable connection and applyOf course, the same applies to the gable-connectable joining part. P220116 PCTTypical FRC plates used for gable-connectable joining parts are between 10 and 100 mm thick, in particular between 35 and 80 mm thick, more particularly between 40 and 70 mm thick, e.g. 40 mm or 50 mm, in particular 60 mm or 70 mm thick. In an embodiment of the gable-connectable joining part according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the joining surface of the negative or positive gable-shaped section at least partially represents two planes inclined relative to the upper side of the joining part. The negative or positive gable-shaped section comprises at least two steps, which, viewed from the upper side of the joining part, have a width or a left width and a right width and a left height and a right height, wherein theOn the top side of the joining part, inclined planes are arranged along the width of the first step and / or along the left width of the second step and / or the right width of the second step and / or the left height of the first step and / or the right height of the first step and / or along the left height of the second step and / or the right height of the second step. Alternatively or additionally, the at least two inclined planes have different inclinations, in particular inclinations in opposite directions. Alternatively or additionally, the number of inclined planes with a first inclination and an opposite inclination is approximately identical. Alternatively or additionally, the inclined planes alternate with a first inclination and an opposite inclination. In an embodiment of the gable-connectable joining part according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, providedNot in contradiction thereto, at least part of the surface of the joining surface of the negative or the positive gable-shaped section has unevennesses in the order of magnitude of 1 µm to 10 mm. Further ranges of magnitude have already been disclosed in connection with the gable connection and naturally apply equally to the gable-connectable joining part. The negative or positive gable-shaped section comprise at least two steps (, which, viewed from the top side of the joining part, have a width or a left width and a right width and a left height and a right height. The unevennesses are arranged along the width of the first step and / or along the left width of the second step and / or the right width (of the second step and / or along the left height of the first step and / or the right height of the first step and / or along the left height of the second step and / or the right height of the second step. In an inventiveIn an embodiment of the gable-connectable joining part, which can be combined with any of the yet-to-be-mentioned and already-mentioned embodiments P220116 PCT, unless contradictory, the joining part has at least two negative gable-shaped sections representing a recess or at least two positive gable-shaped sections representing a projection. The at least two negative gable-shaped sections or the at least two positive gable-shaped sections are directly adjacent, i.e., directly adjacent to one another, or arranged at a distance from one another. In an embodiment of the gable-connectable joining part according to the invention, which can be combined with any of the yet-to-be-mentioned and already-mentioned embodiments, unless contradictory, the joining part has at least two negative gable-shaped sections representing a recess and at least one positive gable-shaped section representing a projection oralternatively, at least one negative gable-shaped section representing a recess and at least two positive gable-shaped sections representing a projection. The negative gable-shaped sections and the positive gable-shaped section, or the negative gable-shaped section and the positive gable-shaped sections, are arranged alternately and / or directly adjacent or spaced apart from one another. The number of gable-shaped sections per joining part, as well as their design (positive or negative) and their arrangement (e.g., alternating positive and negative, always n negative, then n positive, etc.), can be used to adjust how firmly such a joining part can be connected to a complementarily designed (in the sense of the connection) second joining part. The number and, in particular, the arrangement also determine in which spatial directions and with how many other joining parts a gable connection can be formed.In an embodiment of the gable-connectable joining part according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, unless contradictory, the at least one negative gable-shaped section representing a recess and / or the at least one positive gable-shaped section representing a projection are arranged along a part of the periphery or along the entire periphery of the gable-connectable joining part. An arrangement is provided in particular along one, two, three, or four of the side lengths of a gable-connectable joining part with a quadrangular, in particular rectangular or square, shape in plan view. Furthermore, an arrangement is provided in particular along at least the periphery of a circular sector, in particular along the periphery of all circular sectors, of a gable-connectable joining part with a round shape in plan view. Such a gable-connectable joining part has in particularbetween 2 and 8 circular sectors, which are preferably of equal size. P220116 PCT The further object of an aspect of the present invention of providing a method for producing a gable-connectable joining part is achieved by a method according to claim 20. Said method comprises the steps, preferably carried out in the order mentioned: - Providing a three-dimensional object, in particular a concrete slab, further in particular an FRC slab, further in particular a CPC slab, as a joining part blank, wherein the three-dimensional object has the dimensions height, width and thickness, where the thickness has the smallest extent of the three dimensions; - Forming the negative gable-shaped section or the positive gable-shaped section by separating a part of the joining part blank along its thickness, in particular separating by at least one of the following techniques: water jet cutting,CNC milling, sawing with a wide, preferably at least 20 mm wide saw blade. Waterjet cutting, for example, offers the advantage that the joining surfaces automatically acquire a surface roughness with unevenness in the range of 1 µm to 10 mm. Sometimes, the porosity of the concrete is sufficient to achieve an unevenness that allows sufficient adhesion or "jamming" of the filler to the joining surfaces. When sawing with a wide saw blade, not only the gable-shaped sections but also inclined planes representing at least a portion of the joining surfaces can be easily obtained in a single P220116 PCT work step. In one embodiment of the method according to the invention, which can be combined with any of the embodiments yet to be mentioned and those already mentioned, provided they do not contradict each other, the method comprises the step of surface treatment of at least a portion of the joining surface. The joining surface has been created.by separating a portion of the joining part blank along its thickness. The surface treatment is carried out in particular by sandblasting. This achieves a surface roughness with unevenness in the order of 1 µm to 10 mm. The further object of an aspect of the present invention of providing an alternative method for joining joining parts is achieved by a method according to claim 22. The method comprises the steps, preferably carried out in the given order: - Providing a first gable-connectable joining part according to the invention, which has at least one negative gable-shaped section; - Providing a second gable-connectable joining part according to the invention, which has at least one positive gable-shaped section, wherein the negative gable-shaped section and the positive gable-shaped section are designed to be complementary such that the positivegable-shaped section can at least partially protrude into the negative gable-shaped section;- At least partially introducing the positive gable-shaped section of the second joining part into the negative gable-shaped section of the first joining part such that one or more joints are formed between at least a part of the joining surface of the negative gable-shaped section and a part of the joining surface of the positive gable-shaped section;- At least partially filling the one or more joints (20) with a filler. The further object of a further aspect of the present invention of providing a use of a gable connection for connecting joining parts is achieved by a use according to claim 23. Said use comprises the use of a gable connection according to the invention for connecting or joining at least two joining parts, which joining parts are in particular concrete joining parts, further in particularFRC joining parts, and preferably CPC joining parts.P220116 PCT The yet further object of a further aspect of the present invention of providing a multi-part component is achieved by a multi-part component according to claim 24. Said multi-part component, which is in particular a multi-part concrete component, has at least one gable connection according to the invention or comprises at least two gable-connectable joining parts according to the invention. Embodiments of the present invention are explained in more detail below with reference to figures. Fig. 1 shows a gable connection according to the invention between two joining parts; Fig. 2 shows an enlarged section of the gable connection according to the invention from Fig. 1; Fig. 3 shows an embodiment of a gable connection according to the invention between two joining parts with definitions of the dimensions; Fig. 4a shows an enlarged section of a gable connection according to the invention; Fig. 4b a section AA through the section according to Fig. 4a;Fig. 5a shows a gable connection according to the invention between two joining parts; P220116 PCT Fig. 5b shows an enlarged section of the gable connection according to the invention according to Fig. 5a; Fig. 5c shows a section AA through the section according to Fig. 5b; Fig. 6 shows an embodiment of a gable connection according to the invention between two joining parts; Fig. 7 shows an embodiment of a gable connection according to the invention between two joining parts; Fig. 8 shows an embodiment of a gable connection according to the invention between two joining parts; Fig. 9a shows a longitudinal section through a test part having gable connections according to the invention; Fig. 9b shows a cross-section through a test part having gable connections according to the invention; Fig. 9c shows a schematic plan view of a section of a first test part having gable connections according to the invention; Fig. 9d shows a schematic plan view of a section of a second test piece comprising gable connections according to the invention; Fig. 9e shows the results of a 3-point bending testcarried out on the first and second test part according to F ig. 9c und Fig. 9d;Fig. 10 is a schematic plan view of a section of several joining parts joined via gable connections according to the invention; P220116 PCT Fig. 11 is an embodiment of a gable connection according to the invention between two joining parts; Fig. 12 is a multi-part concrete component according to the invention; Fig. 13 is an embodiment of a gable connection according to the invention between two joining parts; Fig. 14 is an embodiment of a gable connection according to the invention between two joining parts; Fig. 15 is an embodiment of a gable connection according to the invention between two joining parts. Figure 1 shows a schematic plan view of a gable connection according to the invention between a first joining part 11 and a second joining part 12. Of the two joining parts 11, 12, only the part is shown which contributes to the gable connection illustrated in Fig. 1.Both joining parts 11, 12 have a gable-shaped section, whereby the two gable-shaped sections intended for interaction are designed to match one another in such a way that one gable-shaped section (here of joining part 12) represents a positive gable-shaped section, i.e., a projection, while the other gable-shaped section (here of joining part 11) represents a negative gable-shaped section, i.e., a recess. The negative gable-shaped section of the first joining part 11 and the positive gable-shaped section of the second joining part 12 are designed to complement one another, albeit with play, so as to form neither a positive nor a frictional connection when joined together without any aids, i.e., taken on their own. The negative gable-shaped section of the first joining part 11 is larger than the positive gable-shaped section of the second joining part 12.In the embodiment shown, both gable-shaped sections each have four steps. The four steps to the left of the first joining part 11 are provided with the reference symbols 30, 30', 30'', and 30'''. The negative gable-shaped section (here of the first joining part 11) is dimensioned such that it can at least partially or even completely accommodate the positive gable-shaped section (here of the second joining part 12). However, to form the gable connection according to the invention, the negative and positive gable-shaped sections are not aligned with one another in such a way that the joining surfaces of the gable-shaped sections directly adjoin one another or come into contact along their entire length.Rather, after alignment, there must still be a gap between at least a portion of the joining surface of the negative gable-shaped section and a portion of the joining surface of the positive gable-shaped section, which gap in turn forms a joint 20 that can be filled with a filler to create a material connection (and thus ultimately also the form fit) between the first joining part 11 and the second joining part 12. P220116 PCT Figure 2 shows an enlargement of the section of the gable connection according to the invention shown in a dashed rectangle in Figure 1. The first joining part 11, the second joining part 12 and the joint 20 can be seen, bounded by the joining surface of the negative gable-shaped section of the first joining part 11 and the joining surface of the positive gable-shaped section of the second joining part 12. The microstructure of the joining surfaces of the gable-shaped sections is clearly visible in the enlargement.The surface of the joining surfaces is not smooth, but rough. The structural unevenness ranges in size from micrometers to millimeters, for example, between 1 µm and 10 mm. This unevenness or roughness is sufficient to achieve a particularly strong connection between the first joining part 11 and the second joining part 12 by filling the joint 20 with a filler, such as mortar. Figure 3 shows a schematic plan view of a gable joint according to the invention of a first joining part 11 and a second joining part 12, comparable to the gable joint shown in Fig. 1. Additionally shown in Fig. 3 are parameters of the gable connection and its components, the first joining part 11, the second joining part 12 and the joint 20 which is later filled with filling material, which parameters are used below to describe in more detail a selection of possible gable connections according to the invention.Among other things, the width of the first step of the gable of the first joining part b is shown. 11-1 , the P220116 PCT width of the first step of the gable of the second joining part b12-1, the width of the second step left hand of the gable of the second joining part b 12-2l , the width of the second step on the right hand side of the gable of the second joining part b12-2r, the width of the third step on the right hand side of the gable of the first joining part b11-3l, the width of the third step on the right hand side of the gable of the first joining part b11-3r, the width of the joint of the third step on the left hand side b f-3l , the width of the entire gable connection bg, the height of the third step on the right hand side of the first joining part h11-3r, the height of the fourth step on the right hand side of the second joining part h 12-4l , the height of the entire gable connection hg, the height of the entire gable connection without joint h gof, the angle of the third left-hand step of the gable of the second joining part α12-3l and the angle of the first right-hand step of the gable of the first joining part α 11-1r . In the embodiment shown, the width of the first step of the gable of the first joining part b 11-1 For example, at 30 mm, it is 10 mm wider than the width of the first step of the gable of the second joining part b12-1, which is 20 mm. The remaining steps of the gable of the second joining part (represented by b12-2l and b12-2r) are all identically wide, with a width of 10 mm, and are thus only half as wide as the first step of the second joining part. The remaining steps—apart from the last step, here the fourth step—of the gable of the first joining part (represented by b 11-3land b11-3r) are all identically wide, also 10 mm wide. The width of the last step of the gable can vary greatly and depends, among other things, on whether there are multiple gable connections adjacent to one another, P220116 PCT or not. In the example shown, one can already see a hint of another gable connection to the right and left of the gable connection described in more detail here, so that the adjacent gable connections share the last step, so to speak. The width of the fourth step of the second joining part assigned to the gable connection described in more detail is, as already mentioned, 10 mm, but the assigned width of the fourth step of the first joining part is only 5 mm and is therefore, if the widths of the right and left steps of this first joining part are added together, exactly 10 mm less wide than the first step of the first joining part is wider than the first step of the second joining part.In the embodiment shown here, there is a mirror symmetry of the left and right sides of the two gables. The total width b. g The gable connection, which is derived from the width of all steps of the first joining part or from the width of all steps of the second joining part, is thus 100 mm. The angle of the third left-hand step of the gable of the second joining part α12-3l, together with the angle of the first right-hand step of the gable of the first joining part α11-1r, represents all angles of any step and is 90°. The height of the third right-hand step of the gable of the first joining part h11-3r and the height of the fourth left-hand step of the gable of the second joining part h 12-4l is 10 mm, representing the height of all steps. From the geometry already described, it can be deduced that the height of the joint, here exemplified by the height of the joint of the third step on the left hand side h f-3l, which corresponds to the distance between the width of the third P220116 PCT step on the left hand side of the first joining part 11 and the width of the third step on the left hand side of the second joining part 12, is a constant 5 mm. The same applies to the constant width of the joint of 5 mm, shown here as an example using the width of the joint of the third step on the left hand side bf-3l, which corresponds to the distance between the height of the third step on the left hand side of the first joining part 11 and the height of the third step on the left hand side of the second joining part 12. From this, a height of the entire gable connection hg of 45 mm and a height of the entire gable connection without the joint h can be derived. gofof 35 mm. Also shown is the overlap height of the joint, shown here as an example using the overlap height of the joint of the third left-hand step hfue-3l, which corresponds to the height of the third left-hand step of the first joining part 11 minus the height of the joint of the third left-hand step hf-3l. Fig. 4a shows an enlarged section of a gable joint according to the invention. The viewing direction is perpendicular to the top side of the joining parts 11, 12. The section can be located similarly to the section shown in Fig. 1, but the section in Fig. 4a is taken from a gable joint, which differs from the gable joint shown in Fig. 1 at least in that the joining surfaces of the first joining part 11 and the second joining part 12 do not run orthogonally to the top and bottom sides of the joining parts 11, 12, but rather represent an inclined plane P220116 PCT. The cross-section thus shows a wedge shape.Of the second joining part 12, both the upper outer edge 120a and the lower outer edge 120b are visible, because their "wedge" becomes increasingly thicker in the plan view shown into the image plane, i.e., from top to bottom, so the inclined plane slopes toward the upper outer edge 120a. For the first joining part 11, only the upper outer edge 11a is visible in the plan view shown. In order to still be able to depict the wedge shape, which tapers into the image plane here, i.e., from top to bottom, the lower outer edge 110b of the first joining part 11 has been drawn in dashed lines. The joining surface of the first joining part 11 is also an inclined plane, but instead of a "positive" inclined plane like the joining surface of the second joining part 12, it could be called a "negative" inclined plane, since here the upper outer edge 110a represents an overhang relative to the lower outer edge 110b.To obtain an inclined plane as the joining surface, the upper and lower outer edges of the same joining part are not congruent. The joint 20 is shown between the first and second joining parts 11, 12. Fig. 4b shows a section AA through the section according to Fig. 4a. As already described, both the joining surface of the first joining part 11, which is located between the upper outer edge 110a and the lower outer edge 110b, and the joining surface of the second joining part 12, which is located between the upper outer edge 120a and the lower outer edge 120b, are inclined planes, i.e., a plane that is not orthogonal to the top and bottom of the joining part. This results in a wedge shape in the cross-section. The joining surface of the first joining part 11 runs at an angle β. 110The joining surface of the second joining part 12 extends at an angle β120. The angles β110 and β120 are usually 90-100°, in particular 90-95°, and in the example shown here are 92°. An offset of 1-2 mm between the upper outer edge and the lower outer edge across the joining surface is sufficient to enable reliable joining of the joining parts, even if there is no microstructure or rough surface on the joining surface and the joining surfaces have a correspondingly smooth surface. Care must be taken to ensure that the angles are not too large, as reliable joining or joining at all is then no longer possible. The upper outer edge of one joining part and the lower outer edge of the other joining part should preferably not overlap in the joined state when viewed from above.The joining parts 11, 12 are three-dimensional objects with the dimensions height, width, and thickness, of which the thickness d11 of the first joining part and the thickness d12 of the second joining part are shown. The thickness usually has the smallest extent of the three dimensions and is the dimension along which the joining surfaces 110, 120 extend. Fig. 5a shows a schematic plan view of a gable joint according to the invention between two joining parts, which differs from the gable joint shown in Fig. 1 at least in that the joining surfaces of the first joining part 11 and the second joining part 12 do not run orthogonally to the top and bottom of the joining parts 11, 12, but represent an inclined plane. The cutout is located at a different location compared to the gable connection in Fig. 1.The joining surface of at least one of the joining parts can additionally be at least partially rough, i.e., its surface can have a roughness, for example, in the range of 1 µm to 10 mm. Fig. 5b shows the section of the gable connection according to the invention shown in Fig. 5a, enlarged and viewed perpendicular to the top side of the joining parts 11, 12. It can be seen that the joining surfaces of the first joining part 11 and the second joining part 12 represent inclined planes, with the joining surface of one joining part running essentially parallel to the joining surface of the other part. A wedge shape is thus evident in cross-section AA.Of the second joining part 12, both the upper outer edge 120a and the lower outer edge 120b are visible across the entire first step 30 and the width of the second step 30', because the "wedge" there becomes increasingly thicker in the plan view shown into the image plane, i.e., from top to bottom, thus the inclined plane inclines toward the upper outer edge 120a. For the first joining part 11, only the upper outer edge 110a is visible across the entire first step 30 and the width of the second step 30' in the plan view shown. In order to still be able to depict the wedge shape there, which tapers into the image plane, i.e., from top to bottom, the lower outer edge 110b of the first joining part 11 has been drawn in dashed lines.The joining surface of the first joining part 11 is also an inclined plane, but instead of a "positive" inclined plane, like the joining surface of the second joining part 12, it could be described as a "negative" inclined plane across the entire first step 30 and the width of the second step 30', since here the upper outer edge 110a represents an overhang relative to the lower outer edge 110b. From the width of the second step 30' of the first joining part 11 to its height, the inclination of the inclined plane then reverses, i.e., the lower outer edge 110b can also be seen along the height, and the inclined plane becomes a "positive" inclined plane. The "wedge" there becomes increasingly thicker in the plan view shown, i.e., from top to bottom, into the image plane.From the width of the second step 30' of the second joining part 12 to its height, the inclination of the inclined plane also reverses, i.e., along the height, the lower outer edge 120b is no longer visible and the inclined plane becomes a "negative" inclined plane. The "wedge" there becomes increasingly narrower in the plan view shown, i.e., from top to bottom, into the image plane. The transition from a "negative" to a "positive" inclined plane or from a "positive" to a "negative" inclined plane can, for example, occur from one step to another, but can also, as shown here, occur from the width to the height of one and the same P220116 PCT step. Generally, to obtain an inclined plane as a joining surface, the upper and lower outer edges of the same joining part must not be congruent. In the view shown in Fig.In the embodiment shown in Figure 5b, the joining surfaces on the left and right sides behave identically, i.e., they are mirror-symmetrical. However, it is also possible that, for example, the joining surface along the width, along the height, or along the width and height of a specific step represents a negative inclined plane only on one side of the gable-shaped section of the first joining part 11, while the joining surface along the width, along the height, or along the width and height of the same specific step on the other side of the gable-shaped section of the first joining part 11 represents a positive inclined plane. The situation is then exactly the other way around for the second joining part 12, in order to maintain the parallelism of the aligned joining surfaces. To simplify the manufacture of the joining parts, the joining surface along the first step, for example, can also be simply orthogonal and not designed as an inclined plane.Between the sections of the joining surface designed as inclined planes, there may also be sections that are not designed as inclined planes, i.e., are simply orthogonal, for example, between a change in the inclination of the inclined plane (i.e., a change in the design of the joining surface from a "negative" inclined plane to a "positive" inclined plane, and vice versa). For the stability of the gable connection, it can be advantageous if the inclined planes alternate, whether from adjacent step to adjacent step or with a change within the steps from their width to their height.The alternation can also be advantageous on a larger scale, i.e. the gable-shaped sections are divided - referenced to the overall height of the gable-shaped section - into a first, preferably terminal, and a second, preferably terminal, area, whereby the first and second areas differ in the inclination of the inclined plane. The separation of the first and second areas can, for example, run approximately along half the overall height of the gable-shaped section, but can also be achieved by a third area whose joining surface is not designed as an inclined plane. Referenced to the overall height of the gable-shaped section, all three areas can, for example, be the same size and thus make up approximately 1 / 3 of the overall height of the gable-shaped section; however, the third area can also be, for example, twice as large as the first and second areas, so that only approximately1 / 4 of the total height of the gable-shaped section is eliminated. For an 8-step, fork-shaped section, for example, the joining surfaces of the first two steps would be designed as "negative" inclined planes, the bottom two steps as "positive" inclined planes, and the four intermediate ones would again be "neutral," meaning not designed as inclined planes. It can also be advantageous if, in a gable-shaped section, the ratio of the joining surface designed as an inclined plane in one direction (e.g., a "positive" inclined plane) to the joining surface P220116 PCT designed as an inclined plane in the other direction (e.g., a "negative" inclined plane) is essentially balanced. "Essentially balanced" does not strictly correspond to a 50:50 ratio, but can easily extend to, for example, 40:60. In the embodiment shown, the joining surfaces are designed as inclined planes along the width and height of the first and second steps 30, 30'.However, this is not a must; for example, only the joining surface along the height or along the width of each step can be designed as an inclined plane, while the other part does not require an inclined plane. The joint 20 is shown between the first and second joining parts 11, 12. Fig. 5c shows a section AA through the section according to Fig. 5b. As already described, both the joining surface of the first joining part 11, which is located between the upper outer edge 110a and the lower outer edge 110b, and the joining surface of the second joining part 12, which is located between the upper outer edge 120a and the lower outer edge 120b, are inclined planes, i.e., a plane that is not orthogonal to the top and bottom of the joining part. This results in a wedge shape in the cross-section. The joining surface of the first joining part 11 runs at an angle β110, the joining surface of the second joining part 12 runs at an angle β120.The angles β110 and β120 are usually 90-100°, in particular 90-95°, and in the example shown here are 91°. P220116 PCT Fig. 6 shows a schematic plan view of an embodiment of a gable joint according to the invention between two joining parts. Compared to Fig. 3, the shape of the positive and negative gable-shaped sections is "more pointed" or "steeper." The height of the entire gable joint hg is identical to the embodiment shown in Fig. 3, but the width of the entire gable joint bg is significantly narrower. The number of stages 30, 30', 30'', 30''' is also four, but these are narrower (e.g. by 50% compared to Fig. 3), as can be seen from the parameters b11-1, b12-1, b12-2l and b11-. 3rcan be seen. Apart from the first step of the negative gable-shaped section of the first joining part 11, the width of the steps 30', 30'', 30''' of the gable-shaped section of each joining part 11, 12 is identical, i.e. the width on the left and right sides is also identical. If one compares the width of these steps of the negative gable-shaped section of the first joining part 11 with the positive gable-shaped section of the second joining part 12, they can be the same width, but do not have to be. If these steps of the negative gable-shaped section of the first joining part 11 are wider than these steps of the positive gable-shaped section of the second joining part 12, the joint 20 becomes wider with each additional step.If these steps of the negative gable-shaped section of the first joining part 11 are narrower than these steps of the positive gable-shaped section of the second joining part 12, the joint 20 becomes narrower with each additional step, until the distance between the joining surfaces perhaps no longer allows any joint formation at all. The height of the steps can be uniform, as is the case in the embodiment of this figure. Both the right and left sides of the negative and positive gable-shaped sections have an identical height, but equally, the negative and positive gable-shaped sections also have an identical height to each other (illustrated by h12-4l and h11-3r). The angles of all steps of each gable-shaped section are orthogonal (illustrated by α12-3l and α11-1r).In the embodiment shown, the entire surface of the joining surface of the negative and positive gable-shaped sections has unevenness in the order of 1 µm to 10 mm (not shown). In addition to or instead of the unevenness, it is also possible for the aligned joining surfaces of the negative and positive gable-shaped sections to represent planes that are essentially parallel to one another and inclined relative to the upper side of the joining parts. Fig. 7 shows a schematic plan view of an embodiment of a gable connection according to the invention between two joining parts. Since the height of each step 30 to 30'''''' is identical, be it from the right and left side of a gable-shaped section or from the positive gable-shaped section of the second joining part 12 and the negative gable-shaped section of the first joining part 11, only the height h11-3 is symbolically shown.The same applies, apart from the width of the first step of the negative gable-shaped section of the first joining part, to the width of each step, so that this width is symbolized by the width b. 11-3r What is special about this embodiment is that it is not only "steeper," as, for example, the embodiment shown in Fig. 3, but also comprises not just four, but eight steps 30 to 30'''''' per gable-shaped section. This is achieved by not only reducing the width of the individual steps, but also by reducing their height, while maintaining a substantially constant overall width b g and total height h gThe angles of all steps of each gable-shaped section are orthogonal (illustrated using α11-1r). A joint 20 forms between the joining surfaces, which can be filled with filler material (not shown). In the embodiment shown, the entire surface of the joining surface of the negative and positive gable-shaped sections has unevenness in the order of 1 µm to 10 mm (not shown). In addition to or instead of the unevenness, it is also possible for the aligned joining surfaces of the negative and positive gable-shaped sections to represent planes that are essentially parallel to one another and inclined relative to the upper side of the joining parts. Fig. 8 shows a schematic plan view of an embodiment of a gable connection according to the invention between two joining parts, which embodiment differs exclusively from that shown in Fig.The embodiment shown in Figure 7, P220116 PCT, differs in that the angle of the steps is not orthogonal, but greater than 90°, for example, 95° (see α11-1r and α12-3l, which are identical in the example shown here). The height and width of the steps, represented by h. 11-3r and b 11-3r , remains unchanged in this embodiment compared to the embodiment of Fig. 7, so that as a consequence of the angulation only the total width b gthe gable connection becomes somewhat smaller, but the overall height hg also remains unchanged. Fig. 9a shows a longitudinal section through a test piece 80 having gable connections according to the invention. The test piece 80 has a span of 2.30 m, whereby the force for the bending test is applied exactly in the middle of the span (see P / 2) and the test piece 80 is supported essentially at the end of the span (see small triangles). The test piece 80 comprises, in addition to a first joining part 11 and a second joining part 12, which are joined via gable connections according to the invention, longitudinal FRC (Fiber Reinforced Concrete) webs 85, which are arranged orthogonally to the joining parts 11, 12 along the height of the joining parts via dovetail-like connections on the joining parts 11, 12. Regarding the arrangement of the FRC webs 85, reference is made to PCT / EP2019 / 073887, filed on 06.09.2019 and published as WO 2021 / 043428 on 11.03.2021.Fig. 4 shown therein, along with the corresponding figure description, shows, for example, a CPC concrete slab as the base structure with two longitudinal FRC webs 85 (only one visible in longitudinal section). The test part 80 shown according to the invention, P220116 PCT, differs essentially from the embodiment of Fig. 4 of PCT / EP2019 / 073887 in that the base structure is not formed by a one-piece CPC concrete slab, but is composed of two CPC concrete slabs that serve as the first and second joining parts 11, 12 and are joined via gable connections according to the invention. Also visible in the longitudinal section are the supports 851 of the FRC webs, the recesses 852 of the FRC webs, and the extensions 854 of the supports of the FRC webs, with which the FRC webs are joined into the first and second joining parts 11, 12. The position of the gable connections 10 in the longitudinal section shown is indicated in a dashed rectangle. Fig. 9b shows a cross-section through the section already shown in Fig.9a shows the test piece 80. Since the section passes through the first joining part 11, specifically at a point where the joining part 11 has not yet been joined, the gable joints are not visible. However, the two longitudinal FRC webs 85 are clearly visible. The FRC web 85 and the first joining part 11 have a total height of 30 cm. The first joining part 11 and the (not visible) second joining part are each 1.2 m wide. Fig. 9c shows a schematic plan view of a section of a first test piece having gable joints according to the invention. The test part comprises a first joining part 11 and a second joining part 12. The first joining part 11 comprises five complete negative P220116 PCT gable-shaped sections, each with five steps, and at each end a further incomplete negative gable-shaped section, of which approximately the lowest to the two lowest outer steps are missing.The second joining part 12 comprises five complete positive gable-shaped sections, each with five steps, and at each end, another incomplete positive gable-shaped section, of which approximately the lowest to the two lowest outer steps are missing. The schematic plan view shows a total of two of the five complete negative or positive gable-shaped sections, which join together in two gable joints. The total width of each complete gable joint is given as 17.91 cm, with the step width of the first step of the first joining part 11 being 4.03 cm, and the step width of the first step of the second joining part being 3.00 cm, resulting in a joint width of 0.51 cm. The step width of the other steps of the first and second joining parts 11, 12 is 1.5 cm. Further dimensions can also be found in the figure. For example, the total height of the gable connection is 20.50 cm with a step height of 4.0 cm and a joint height of 0.5 cm. The height and width of the steps are not orthogonal to each other in the plan view, but rather form an angle of 91.60°. Fig. 9d shows a schematic plan view of a section of a second test piece having gable joints according to the invention. The test piece comprises a first joining part 11 and a second joining part 12. The P220116 PCT first joining part 11 comprises five complete negative gable-shaped sections, each with eight steps, and at each end a further incomplete negative gable-shaped section, of which approximately only the lowest step up to the two lowest inner steps are present. The second joining part 12 comprises five complete positive gable-shaped sections, each with eight steps, and at each end a further incomplete positive gable-shaped section, of which approximately only the lowest step up to the two lowest inner steps are present.The schematic plan view shows a total of one complete and one truncated section of the five complete negative and positive gable-shaped sections, which join together in two gable joints (one of which is only partially shown). The total width of each complete gable joint is 21.8 cm, with the step width of the first step of the first joining part 11 being 3.54 cm, and the step width of the first step of the second joining part being 2.5 cm, resulting in a joint width of 0.52 cm. Further dimensions can also be seen in the figure. For example, the total height of the gable joint is 20.50 cm, with a step height of 2.5 cm and a joint height of 0.5 cm. The height and width of the steps are not orthogonal to each other in the plan view, but rather form an angle of 92.50°. Fig. 9e shows the results of a 3-point bending test carried out on the first and second test pieces according to Fig. 9c P220116 PCT and Fig. 9d respectively.The diagram shows the force applied at point P / 2 (see Fig. 9a) in kN and the resulting deformation in mm. The 8-step gable connection fails at a maximum force of 119.5 kN, while the 5-step gable connection fails only at a maximum force of 126.6 kN. The 5-step gable connection was slightly superior to the 8-step gable connection in another respect: the fracture at failure runs less along the joint of the gable connection and more through the gable-shaped sections of the joining parts 11, 12 themselves. Thus, it is the material that fails sooner, not the gable connection. Fig. 10 shows a schematic plan view of a section of several joining parts 11, 12, 13 joined using gable connections 10 according to the invention, which joining parts have geometries deviating from purely rectangular basic shapes in plan view.The joining resembles a seam system, wherein the lower side of the first joining part 11 is "sewn" to a section of the upper side of the second joining part 12 via several gable connections 10 (for better clarity, only one of these is provided with a reference symbol) of different designs, and the lower side of the third joining part 13 is "sewn" to another section of the upper side of the second joining part 12 via several gable connections 10 (for better clarity, only one of these is provided with a reference symbol) of different designs.Along part of the further outer edges P220116 PCT of the first and third joining parts 11, 13, as well as along the remaining outer edges of the second joining part 12, further joining parts are joined via gable connections according to the invention. However, due to the selected detail, these are not shown in full and are only represented by their negative or positive gable-shaped sections, which interact with those of the first, second, and third joining parts 11, 12, 13. Regarding the design of the gable-shaped sections, the majority correspond to seven-step gable-shaped sections, as shown, for example, in Fig.7 or 8, other gable-shaped sections taper significantly less sharply with a very wide first step and a total of only four steps; yet other gable-shaped sections are not fully gable-shaped sections but are partially trimmed, whereby in the immediate vicinity of the interface of more than two panels, a gable shape is usually dispensed with and only a straight cut is made. Since this affects a relatively small proportion of the contact surface of the joining parts, it has no significant influence on the stability of the overall connection of the individual joining parts. Fig. 11 shows a schematic plan view of an embodiment of a gable connection according to the invention between two joining parts 11, 12, which are not mirror-symmetrical. For example,The left side of the negative gable-shaped section of the first joining part 11 P220116 PCT and the left side of the positive gable-shaped section of the second joining part 12 each have four steps (30, 30', 30'', 30'''), while the respective right sides comprise eight steps each. This asymmetry results in a different design of the joint 20 on the left side compared to the right side, with a different joint height and joint width. Fig. 12 shows a schematic plan view of a multi-part concrete component according to the invention comprising a total of five joining parts 11, 12, 13, 14, 15, of which the first joining part 11 is arranged centrally and is joined to one joining part 12, 13, 14, 15 each at the top, bottom, left, and right. The second joining part 12, for example, has directly adjacent and neighboring negative gable-shaped sections, three of which are explicitly drawn.The third joining part 13, in turn, has alternating and directly adjacent negative and positive gable-shaped sections, three of which are also explicitly shown. The fourth joining part 14, in turn, has positive gable-shaped sections spaced apart from one another at different distances, three of which are explicitly shown. The distance between the adjacent gable-shaped sections is, for example, half the width of a gable connection up to, for example, one to two widths of a gable connection. The fifth joining part 15 has both negative and positive gable-shaped sections; however, these are not arranged strictly alternately, but instead directly adjacent to one another. P220116 PCT Fig. 13 shows a schematic plan view of an embodiment of a gable connection according to the invention between two joining parts 11, 12, between which a joint 20 is formed, which is filled with filler (not shown).Contrary to the previously shown embodiments, the surfaces that constitute the height and width of the steps 30, 30', 30'', 30''' of the individual joining parts 11, 12 in plan view and serve as joining surfaces 110, 120 are not flat surfaces, but curved surfaces. For the purposes of the invention, such geometries also count as steps. The crucial point is that the gable-shaped sections become wider with each additional step and thus represent a kind of "Christmas tree" in plan view. The geometries defined based on the embodiments with the steps formed from the flat surfaces (whereby inclined flat surfaces having an angle β ≠ 90° are also included, see, for example, Figs. 5a-5c) (see, for example, Figs. 3, 6, 8) can easily be transferred to the embodiment shown here with curved surfaces. For the first and second stages 30, 30', corresponding auxiliary lines (shown in dashed lines) are drawn.The auxiliary lines for defining the width of the individual steps are, for example, drawn parallel to the course of that side of the joining part on which the respective gable-shaped section is arranged. In terms of their height, these auxiliary lines are then drawn at the transition from one step to the other (see, for example, b11-. 2l , b 12-2l). For the very first step, this auxiliary line is placed at the "highest" point of this step for positive P220116 PCT gable-shaped sections 12 or at the "lowest" point for negative gable-shaped sections 11 (see, for example, b11-1). The auxiliary lines for defining the height of the individual steps correspond to the tangents placed at the transition of each individual step to the adjacent step. The intersection point (in the plan view, these are actually two planes and not straight lines, resulting in an intersection line for the 3D joining part) specifies the respective end of the auxiliary lines, which can be used to further define the step geometry, such as the step height (see, for example, h11-2l and h12-2l) and the angle α (see, for example, α11-1r, α12-1r). In the embodiment shown, the angle α of the first and second joining parts on the left side is, for example,Optionally the same size, on the right side of the gable-shaped sections, the angle α of the first joining part 11 is, for example, optionally larger than the angle α of the second joining part 12, whereby the joint 20 is narrower on the right side. Thus, even with curved surfaces as joining surfaces, the means already discussed in connection with the embodiments having flat surfaces as joining surfaces, such as unevenness, an angle α ≥ 90° and / or an angle β ≠ 90°, can be used. Fig. 14 shows a schematic plan view of an embodiment of a gable connection according to the invention between two joining parts 11, 12, between which a joint 20 is formed, which is filled with filler (not shown).Contrary to the previously shown P220116 PCT embodiments, the surfaces that constitute the height and width of the steps 30, 30', 30'', 30''' of the individual joining parts 11, 12 in plan view and serve as joining surfaces 110, 120 are not flat surfaces, but rather wavy surfaces. For the purposes of the invention, such geometries also count as steps. The crucial point is that the gable-shaped sections become wider with each additional step and thus represent a kind of "Christmas tree" in plan view. The steps formed from the flat surfaces (whereby inclined flat surfaces having an angle β are also possible here). 90°are included, see e.g. Fig. 5a-5c) defined geometries (see e.g. Fig. 3, 6, 8) can be easily transferred to the embodiment shown here with undulating surfaces. For the four steps 30, 30', 30'', 30''', corresponding auxiliary lines (shown in dashed lines) are drawn in the plan view. The auxiliary lines are straight lines that represent a center line, based on which the height (see e.g. h11-4l and h12-4l) and width (see e.g. b11-2l, b12-2l) of the steps as well as the angle α (see e.g. α11-1r, α12-2r, α11-3l, α12-3l) can be read off. Since the joining parts 11, 12 are usually 3D objects, the auxiliary lines are strictly speaking auxiliary planes defined by mathematical averaging. In the embodiment shown, for example,The angle α of the first and second joining parts on the left side is 90°, and thus also the same size; on the right side of the gable-shaped sections, the angle α of the first joining part 11 and the second joining part 12 is greater than 90°. Thus, even with corrugated surfaces P220116 PCT as joining surfaces, the means already discussed in connection with the embodiments having flat surfaces as joining surfaces, such as unevenness, an angle α ≥ 90° and / or an angle β ≠ 90°, can be used. However, to qualify as corrugated surfaces in the sense of the embodiment shown, the joining surfaces should have waves whose extent differs from the unevenness by a magnitude of, for example, 1 µm to 10 mm, in particular from 1 µm to 1 mm. Fig. 15 is a schematic plan view of an embodiment of a gable connection according to the invention between two joining parts 11, 12.The joining parts 11, 12 are so-called FRC slabs (FRC = Fiber Reinforced Concrete), i.e. concrete slabs prestressed with fibers, between which a joint 20 filled with a filler, such as mortar, is formed. The course of the fibers (= reinforcements 40) within the concrete is shown by dashed lines, since the reinforcements 40 themselves would not be visible from a bird's eye view. The gable-shaped sections of the joining parts 11, 12 each have four steps on the left and right hand side 30, 30', 30'', 30''', whereby the angle α, shown as an example using the angles α11-3l, α12-3l, is 90° on the left hand side, while on the right hand side the angle α is 90°, shown as an example using the angles α. 11-1r , α 12-2r, more than 90°, e.g. 95.0°. If one now compares the reinforcements 40 running in the first and second joining parts 11, 12 on the left and right hand sides, it can be seen that P220116 PCTright hand, where the angle α is more than 90°, part of the reinforcements 40 is severed due to the inwardly tapered joining surface formed by the height of the steps on the right. Here it is now important to find the optimal working range for the desired properties of the gable connection between the reinforcement spacing (= distance between adjacent fibers) and the angle α. Cutting the reinforcement weakens the joining part itself, but an angle α greater than 90° improves the hold between the joined parts. In the present exemplary embodiment, for example, It would have been more advantageous to choose the angle α somewhat smaller, for example between 91°-91.5°, in order to prevent the now severed reinforcements 40 from remaining intact.To reduce the number of reinforcements 40 being severed, the height, width, and / or number of steps can also be modified. List of reference symbols 10 Gable connection 11 First joining part 110 Joining surface of first joining part 110a Upper outer edge of first joining part 110b Lower outer edge of first joining part 12 Second joining part 120 Joining surface of second joining part 120a Upper outer edge of second joining part 120b Lower outer edge of second joining part 13 Third joining part P220116 PCT. 14 Viertes Fügeteil 15 Fifth joining part 20 Fuge 21 Fillers 30 Stufe 40 Reinforcement 80 Test piece 85 FRC web 851 Support FRC web 852 Recess FRC web 854 Extension support FRC web b Breite b11 Width of gable first joining part b 12 Width gable second joining part b 11-1 Width first step gable first joining part b 12-1 Width first step gable second joining part b 12-2lWidth of second step left side gable second joining partb12-2r Width of second step right side gable second joining part b11-3l Width of third step left side gable first joining part b11-3r Width of third step right side gable first joining partb g Total width of gable connection b f-3l Wide joint third step left side h Höhe h11-3r Height of third step right side gable first joining part P220116 PCT h12-4l Height of fourth step left side gable second joining part h f-3l Height joint third step left side h fue Overlap height joint hfue-3l Overlap height joint third step left side gable h g Total height of gable connection h gof Total height of gable connection without joint d Dicke d11 Thickness of first joining part d12 Thickness of second joining part α Winkel α12-3l Angle of third step left side gable of second joining part α11-1r Angle of first step right side gable of first joining part β Winkel β 110Angle of the joining surface of the first joining part β 120 Angle of the joining surface of the second joining part P220116 PCT

Claims

Patent claims 1. Gable connection comprising a negative gable-shaped section of a first joining part (11) with an upper side, representing a recess, and a positive gable-shaped section of a second joining part (12) with an upper side, representing a projection, wherein: - the negative gable-shaped section and the positive gable-shaped section each comprise at least one step (30); - the negative gable-shaped section and the positive gable-shaped section have joining surfaces (110; 120) aligned with one another along the at least one step (30); - the negative gable-shaped section and the positive gable-shaped section are designed to be complementary in such a way that the positive gable-shaped section can protrude at least partially into the negative gable-shaped section;- the positive gable-shaped section extends at least partially into the negative gable-shaped section in such a way that one or more joints (20) are formed between at least a part of the joining surface (110) of the negative gable-shaped section and a part of the joining surface (120) of the positive gable-shaped section; - the one or more joints (20) are at least partially filled with a filler; P220116 PCT; characterized in that- at least part of the surface of the joining surface (110; 120) of the negative and the positive gable-shaped section has unevenness in the order of magnitude of 1 µm to 10 mm; and / or- at least one of the at least one step (30) of the first joining part (11) and / or at least one of the at least one step (30) of the second joining part (12), which at least one step (30) of the first joining part (11) or of the second joining part (12) viewed from the top side of the first joining part (11) or the second joining part (12) has a width (b11-1, b11-3l, b11-3r, b12-1, b12-2l, b12-2r), a height (h12-4l, h11-3r) and an angle α (α12-3l, α11-1r), which angle is α ≥ 90°, in particular α > 90°, further in particular 90° < α ≤ 110°, so that the height and width of the at least one step (30) are not orthogonal to one another and the at least one step (30) tapers along its height and with increasing distance from the width.2.Gable connection according to claim 1, wherein the mutually aligned joining surfaces (110, 120) of the negative and positive gable-shaped sections at least partially represent planes that are substantially parallel to one another and inclined relative to the upper side of the joining parts. P220116 PCT3. Gable connection according to claim 2, wherein the negative gable-shaped section and the positive gable-shaped section each comprise at least a first and a second step (30, 30'), which, viewed from the upper side of the first joining part (11) or the second joining part (12), have a width (b). 11-1 , b 12-1 ) or a left width (b12-2l) and a right width (b12-2r) and a left height and a right height, wherein the inclined planes relative to the upper side of the joining parts are arranged along at least one of the following:- the width (b11-1, b12-1) of the first step (30);- the left width (b12-2l) and / or the right width (b 12-2r) of the second step (30');- the left height and / or the right height of the first step (30);- the left height and / or the right height of the second step (30').

4. Gable connection according to claim 2 or 3, wherein the mutually aligned joining surfaces (110, 120) of the negative and the positive gable-shaped section represent at least two pairs of partially substantially parallel planes that are inclined relative to the upper side of the joining parts, and wherein in particular the inclined planes of one pair are aligned opposite to the inclined planes of the other pair. P220116 PCT5.Gable connection according to one of claims 2 to 4, wherein the mutually aligned joining surfaces (110, 120) of the negative and the positive gable-shaped section represent an even number of pairs of partially substantially parallel planes that are inclined relative to the upper side of the joining parts, and wherein the inclined planes of one half of the pairs are aligned opposite to the inclined planes of the other half of the pairs, in particular alternately such that the inclined planes of adjacent pairs are aligned opposite.

6. Gable connection according to one of the preceding claims, wherein the at least one step (30) of the first joining part (11) and the at least one step (30) of the second joining part (12) have a width (b) when viewed from the upper side of the first joining part (11) or the second joining part (12). 11-1 , b 12-1) or a left width (b11-3l, b12-2l) and a right width (b11-3r, b12-2r) and a left height (h12-4l) and a right height (h11-3r), wherein the unevennesses are formed on at least one of the following: - the surface of the joining surface (110) of the negative gable-shaped section, which surface extends along the one width (b11-1) or the left width (b11-3l) and / or the right width (b 11-3r ) which extends over the at least one step (30);- the area of the joining surface (110) of the negative gable-shaped section, which surface extends along the P220116 PCTleft height and / or the right height (h11-3r) of the at least one step (30);- the area of the joining surface (120) of the positive gable-shaped section, which surface extends along the one width (b 12-1 ) or the left width (b 12-2l ) and / or the right width (b 12-2r) of the at least one step (30);- the surface of the joining surface (120) of the positive gable-shaped section, which surface extends along the left height (h12-4l) and / or the right height of the at least one step (30).

7. Gable connection according to one of the preceding claims, wherein the positive gable-shaped section comprises n steps (30), where n is a natural number, in particular a number from 2 to 20 inclusive, further in particular from 4 to 12 inclusive, and again further in particular from 5 to 9 inclusive.8.Gable connection according to claim 7, wherein the positive gable-shaped section protrudes into the negative gable-shaped section such that at least n / 2 of the n steps (30) of the positive gable-shaped section, in particular at least 3 / 4 n of the n steps (30) of the positive gable-shaped section and further in particular n-1 of the n steps (30) of the positive gable-shaped section protrude completely into the negative gable-shaped section.

9. Gable connection according to claim 8, wherein n-1 of the n steps (30) of the positive gable-shaped section protrude completely into the negative gable-shaped section and the lowest one step (30) of the positive gable-shaped section protrudes at least partially into the negative gable-shaped section, in particular to half its height and further in particular to 3 / 4 of its height.Gable connection according to one of the preceding claims, wherein the gable connection has a total width (bg) and a total height (hg), wherein the total height (h. g ) is greater than the total width (b g), in particular by a factor of 1.05 up to and including 5, further in particular by a factor of 1.05 up to and including 3, further in particular by a factor of 1.05 up to and including 2.

11. Gable connection according to one of the preceding claims, wherein the first joining part (11) and the second joining part (12) are three-dimensional objects with the dimensions height (h), width (b) and thickness (d), in which the thickness (d) has the smallest extent of the three dimensions and the joining surfaces (110, 120) extend along the thickness (d) and / or wherein the first joining part (11) and the second joining part (12) are concrete slabs, in particular CPC slabs.

12. Gable connection according to one of the preceding claims, wherein a continuous joint (20) is formed between the joining surface (120) of the positive gable-shaped section and the joining surface (110) of the negative gable-shaped section.13.Gable connection according to one of the preceding claims, wherein the overlap height of the joint (hfue-3l) of the at least one step (30), which results from the height of the at least one step of the first joining part (11) less the height of the joint (hf-3l) of the at least one step, is at least equal to or, in particular, by a factor of 1.5 to 5.0 inclusive, further in particular by a factor of 2.0 to 3.0 inclusive, or even of 3.0 to 4.0 inclusive, greater than the width of the joint (bf-3l) of the at least one step (30).

14. Gable connection according to one of the preceding claims, wherein at least one of the following is fulfilled: - the negative gable-shaped section and the positive gable-shaped section have the same number of steps. (30) auf;P220116 PCT - the negative gable-shaped section and / or the positive gable-shaped section are mirror-symmetrical.

15. Gable-connectable joining part, in particular in the form of a concrete slab, further in particular in the form of an FRC slab, with an upper side having at least one negative gable-shaped section representing a recess or at least one positive gable-shaped section representing a projection, wherein: - the negative gable-shaped section or the positive gable-shaped section comprises at least one step (30), in particular including 2 to 20, further in particular including 4 to 12, and again further in particular including 5 to 9, steps; and - the negative gable-shaped section orthe positive gable-shaped section has a joining surface (110; 120) along each of the at least one step (30); characterized in that - at least part of the surface of the joining surface (110; 120) of the negative or positive gable-shaped section has unevenness in the order of magnitude of 1 µm to 10 mm; and / or - at least one of the at least one step (30), viewed from the top side of the joining part, has a width (b11-1, b11-3l, b11-3r, b12-1, b12-2l, b12-2r), a height (h12-4l, h11-3r) and an angle α (α12-3l, α11-1r), which angle αP220116 PCT. ≥90°, so that the height and width of the at least one step (30) are not orthogonal to one another, and which angle α is in particular 90°< α < 110°, so that the at least one step (30) tapers along its height and with increasing distance from the width; and / or- the joining surface (110, 120) of the negative or positive gable-shaped section at least partially represents a plane inclined relative to the upper side of the joining part.

16. Gable-connectable joining part according to claim 15, wherein the joining surface (110, 120) of the negative or the positive gable-shaped section at least partially represents two planes inclined relative to the upper side of the joining part and the negative or positive gable-shaped section comprises at least two steps (30, 30') which, viewed from the upper side of the joining part (11; 12), have a width (b 11-1 , b 12-1 ) or a left width (b 12-2l) and a right width (b12-2r) and a left height and a right height, wherein the inclined planes relative to the upper side of the joining part are arranged along at least one of the following: - the width (b11-1, b12-1) of the first step (30); - the left width (b12-2l) and / or the right width (b12-2r) of the second step (30'); - the left height and / or the right height of the first step (30); P220116 PCT - the left height and / or the right height of the second step (30'); and / or wherein the at least two inclined planes have different inclinations, in particular inclinations in opposite directions; and / or wherein the number of inclined planes with a first inclination and an opposite inclination is approximately identical; and / or wherein the inclined planes with a first inclination and an opposite inclination alternate.17.Gable-connectable joining part according to claim 15 or claim 16, wherein at least a part of the surface of the joining surface (110; 120) of the negative or the positive gable-shaped section has unevenness in the order of magnitude of 1 µm to 10 mm and the negative or positive gable-shaped section comprises at least two steps (30, 30') which, viewed from the top side of the joining part (11; 12), have a width (b11-1, b12-1) or a left width (b12-21) and a right width (b12-. 2r ) and have a left height and a right height, wherein the unevennesses are arranged along at least one of the following:- the width (b11-1, b12-1) of the first step (30);- the left width (b12-2l) and / or the right width (b 12-2r) of the second step (30'); - the left height and / or the right height of the first step (30); P220116 PCT - the left height and / or the right height of the second step (30').

18. Gable-connectable joining part according to one of the preceding claims, comprising: - at least two negative gable-shaped sections representing a recess or at least two positive gable-shaped sections representing a projection, wherein the at least two negative gable-shaped sections or the at least two positive gable-shaped sections are arranged directly adjacent to or spaced from one another; - at least two negative gable-shaped sections representing a recess and at least one positive gable-shaped section representing a projection, or at least one negative gable-shaped section representing a recess and at least two positive gable-shaped sections representing a projection,wherein the negative gable-shaped sections and the positive gable-shaped section, or the negative gable-shaped section and the positive gable-shaped sections, are arranged alternately and / or directly adjacent or spaced from one another.

19. Gable-connectable joining part according to one of the preceding claims, wherein the at least one negative gable-shaped section representing a recess and / or the at least one positive gable-shaped section representing a projection are arranged along part of the periphery or along the entire periphery of the gable-connectable joining part, in particular: - along one, two, three, or four of the side lengths of a gable-connectable joining part with a quadrangular, in particular rectangular or square, shape in plan view; - along at least the periphery of a circular sector, in particular along the periphery of all circular sectors, of a gable-connectable joining part with a round shape in plan view,wherein the gable-connectable joining part has, in particular, between 2 and 8 circular sectors, which are preferably of equal size.

20. A method for producing a gable-connectable joining part according to one of claims 15 to 19, comprising: - providing a three-dimensional object, in particular a concrete slab, further in particular an FRC slab, as a joining part blank, wherein the three-dimensional object has the dimensions height (h), width (b), and thickness (d), where the thickness (d) has the smallest extension of the three dimensions; - forming the negative gable-shaped section or the positive gable-shaped section by severing a part of the joining part blank along its thickness (d), in particular severing using at least one of the following techniques: water jet cutting, CNC milling, sawing with a wide, preferably at least 20 mm wide, saw blade. P220116 PCT21. Method for producing a gable-connectable joining part according to claim 20,comprising: - surface treatment of at least a portion of the joining surface created by separating a portion of the joining part blank along its thickness (d), in particular by means of sandblasting.

22. Method for joining joining parts, comprising: - providing a first joining part (11) according to one of claims 15 to 19, comprising at least one negative gable-shaped section; - providing a second joining part (12) according to one of claims 15 to 19, comprising at least one positive gable-shaped section, wherein the negative gable-shaped section and the positive gable-shaped section are designed to be complementary such that the positive gable-shaped section can at least partially protrude into the negative gable-shaped section; - at least partially introducing the positive gable-shaped section of the second joining part (12) into the negative gable-shaped section of the first joining part (11) such thatthat one or more joints (20) are formed between at least a part of the joining surface (110) of the negative gable-shaped section and a part of the joining surface (120) of the positive gable-shaped section; P220116 PCT - At least partially filling the one or more joints (20) with a filler.

23. Use of a gable connection according to one of claims 1 to 14 for connecting joining parts, in particular made of concrete, further in particular made of FRC panels.

24. Multi-part component, in particular concrete component, having at least one gable connection according to one of claims 1 to 14 or comprising at least two gable-connectable joining parts according to one of claims 15 to 19. P220116 PCT,

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