NO823463L - BALK-SHAPED BUILDING ELEMENT OF HARDWARE MATERIAL, PROCEDURE FOR AA PREPARING THIS AND PROCEDURE FOR AA EXECUTE A FRAME OR STAND FOR A BUILDING, OR PART OF SUCH USING SUCH BUILDING ELEMENTS - Google Patents

Description

Technical area

The present invention relates to beam-shaped building elements, comprising a beam part provided with a longitudinal reinforcement of castable and hardenable material, such as concrete, and a second beam part running at a distance from the beam part, which is connected to the first beam part via a back and forth between the beam parts ongoing thread.

The invention also relates to a method of producing such beam-shaped building elements and also indicates ways of utilizing these, e.g. for, with a simplified technique, to make a frame or trunk for a building or part of one.

The position of the technique

A beam-shaped building element of the above type is described and shown in the West German patent document 812,206.

The West German generally available document no. 2,929,350 can also be considered to describe such a building element, although

in this case it is a matter of a concrete slab and not a concrete beam part, which is connected to another beam part via a thread running back and forth.

In the German patent document No. 812,206 it consists

second beam part of two angle irons welded together, which together form a T-profile. The building element is designed to

form part of a beam construction, which even re-

includes additional profile elements. The building element as such therefore has very limited application possibilities.

In the case of the building element according to the West German generally available document no. 2,929,350, even the second beam part consists of metal, which e.g. steel, which is welded to the reciprocating wire. The application possibilities for this type of building board are likewise very limited.

Other types of building elements are described, e.g. in

the published PCT application No. WO 80-01297, which describes a building element consisting of two parallel wooden

lists, which are connected by a thread running back and forth between them.

The Swiss Patent No. 547,927 describes

a concrete slab, which is connected via wires to a number of parallel metal elements.

The German generally available document No. 1,784,828 describes three pieces of triangularly arranged wooden beams, which are connected by struts to form a truss structure.

US patent document No. 4,125,981 describes a building structure, comprising two parallel composite discs onto which concrete is sprayed, so that the discs are incorporated into the concrete structure.

Purpose of the invention:

The purpose of the invention is to provide a light and rigid beam-shaped building element, the dimensions of which can be easily varied depending on existing requirements, which is easy to produce without complicated equipment and which can find different applications within construction technology, where it can be used for both vertical and horizontal assembly in connection with the construction of trunks for building structures. Brief description of the invention: A beam-shaped building element according to the invention is of the type specified above and is essentially characterized by the fact that the other beam part also consists of castable and hardenable material, such as concrete, and is provided with longitudinal reinforcement, and that the forward and back between the beam parts running wire is connected to each of the beam parts' longitudinal reinforcement under the connection of the beam parts into a light, moment-stiff force-absorbing unit with an integrated reinforcement. The reciprocating thread - which can be said to form a distance reinforcement between the beam parts, which determines the width or height of the building element - is statically significant in that it connects the longitudinal reinforcements of the beam parts with each other. The beam's properties, such as static bearing capacity, bending resistance and moment absorption capacity, can easily be varied and adapted to prevailing needs.

The beam's shape and low weight per running meter, its material steel and concrete in a static combination enables a wide range of applications.

With the help of vertical and horizontal building elements according to the invention, one can thus easily build up a frame or a stem for a building, whereby the building elements are simply connected by means of a screw-bolt connection. The central free space between the beam parts in the area of the wire running back and forth can thereby find various advantageous areas of application. The room can thus be used to easily arrange frames for doors and windows in the building. The room can also be used to accommodate insulation, whereby the wall of the building achieves a substantially continuous insulation along the entire wall without any occurrence of thermal bridges.

A trunk construction made of building elements can further be provided with front and rear form walls, on which concrete is poured to form an essentially continuous wall or a beam layer, whereby the building element is thus used as<*>

so-called permanent formwork.

Building elements according to the invention can advantageously be used as structures for building constructions such as e.g. villas, low and high-rise buildings, school and industrial buildings. Furthermore, other building constructions, such as roofs, balconies, balustrades etc., can be easily built up using the building element.

The beam's shape facilitates the use of details for fixing facade elements, such as bricks or other facade cladding.

In a house built up from building elements according to the invention, the drawing of WS and electrical cables is further facilitated.

In practice, it is preferred that both beam parts remain

of the same material, possibly with intermediate parts that connect the beam parts.

In a preferred embodiment, at least one of the sides of the beam parts presents a longitudinal wooden strip, which is embedded in the beam part or connected to it in another way and arranged to facilitate the connection of the beam part with another building element via nail or screw connection. This embodiment offers many advantages. Despite the fact that the building's frame or stem consists of building elements made of concrete according to the invention, whereby a powerful construction with high strength is achieved, there are no difficulties in placing interior walls, joists, trusses and the like made of wood.

Alternatively, instead of molding a wooden strip into one or both beam parts, it is also possible to simply arrange a special wooden strip on the building element, whereby corresponding advantages can be achieved.

Another method for the production of a beam-shaped, reinforced building element comprises two parallel, reinforced beam parts running at a distance from each other of castable and hardenable material, such as concrete, characterized essentially by the fact that in a form that is provided with side and gable closures as well as a central , upwardly tapering form body, whose height roughly corresponds to half the thickness of the finished element, a reinforcing ladder is introduced which includes a longitudinal reinforcement for each beam part and a reinforcing wire that connects these and which runs back and forth between the longitudinal reinforcements, that then in the form a similar downwardly tapering mold body is introduced, whose height roughly corresponds to half the building element's thickness, and is anchored in relation to the first, and that concrete or other hardenable material is poured into the mold and vibrated and allowed to harden.

The method according to the invention does not require complicated mold equipment, which is why the factory production of the building element according to the invention is possible without major investment costs. In many cases, it can thus be profitable to arrange for the production of the building elements in the immediate vicinity of a construction site, where a building is to be erected, the trunk of which is to consist of building elements according to the invention.

The building element's low weight per running meters, on the other hand, means that there are no difficulties in transporting these from a manufacturing site to a possible construction site. In practice, it is preferred that the reinforcement ladder is placed on strips of foam plastic or similar material on the lower mold body, which strips are compressed under the influence of the weight of the reinforcement ladder and the upper mold body while forming a seal for the cast concrete or equivalent, so that the central part of the reinforcement ladder is essentially free for concrete.

In the execution of a frame or a trunk for a building or a part of such with the use of beams

shaped building elements according to the invention, the building element can

These are used both as vertical wall supports, horizontal support elements and trusses, which are connected by means of screw connections, whereby the free space between the parts of the building elements in the area of the central part of the reinforcement ladder is used to facilitate the placement of window and door frames and the like between the building elements, for wiring, for insulation or the like.

A building element according to the invention thus gets

thereby a more or less universal function with diverse application possibilities. In addition, the free space between the parts of the building elements is used in different ways, which facilitates and makes construction of the building more affordable.

Further aspects of the invention will become apparent

of the subsequent description of some embodiments thereof. The description takes place in connection with the subsequent drawings.

Brief explanation of the drawings

Figure 1a is a perspective view of a beam-shaped building element according to the invention,

Figure 1b-e shows side and end views of four outer

different types of beam-shaped building elements where at least one of the parallel longitudinal beam parts shows a resp. two embedded wooden strips to facilitate the building element's joining

joining with another building element by means of a nail or wood screw connection,

Figures 1f-1k give examples of building elements according to the invention with ends designed in different ways, and. intended to be used as vertical support or bearing elements

ter,

figure 11 shows an example of a roof truss, which is molded together from two building elements according to the invention,

figure 1m is a side view of a building element according to the invention, intended for use as a horizontal support

beam,

Figures 2a-2f show a form of and illustrate the corridor

when producing a beam element according to Figure 1a, all drawings with the exception of Figure 2e being end views, Figure 2e showing a perspective view of the form and cast building element during curing,

Figure 3 is a perspective view showing one of the beam-shaped building elements according to the invention made into a building trunk,

figures 4a-4d are perspective drawings which clarify the procedure for casting a base plate on foundation blocks as well as the initial step when erecting a log for a house on this,

figure 5 is a perspective drawing illustrating the erection of part of the trunk of a house directly on foundation blocks.

Figure 6a is a perspective view showing the attachment of window and door frames to a part of the trunk of a house built up by the building element according to the invention,

figure 6b is a side view showing a mold mounted against the beam for casting wall and beam layers, so-called permanent formwork, for a multi-storey house,

figures 7a-7f show some detailed arrangements when constructing the lower part of a trunk for a house,

figures 8a-8d are detailed drawings showing special support arrangements when required when building a trunk for a house,

figures 9a and 9b are plans and illustrate two different arrangements for casting walls for a building without special formwork and using concrete planks which join the beam-shaped building element according to the invention.

Description of preferred embodiments

With reference to figure 1a, a beam-shaped building element 1 consists of a first beam part 2 of concrete provided with a longitudinal reinforcement 4 and a parallel to this second beam part 3, also made of concrete, which also shows a longitudinal reinforcement 5. Back and forth between the beam parts runs a wire 6 which is welded to each of the beam parts' longitudinal reinforcement 4,5 while connecting the beam parts into a light, moment-stiff, force-absorbing unit thus provided with an integrated reinforcement.

The height of the beam parts resp. thickness can vary depending on the requirements placed on the building element when it is used. The longitudinal reinforcement 4 resp. 5.in each beam part can also have a varying diameter, like the reinforcement 6 running back and forth, which acts as a distance reinforcement between the beam parts and thus determines the height of the building element in a horizontal position.

As will be explained in more detail in the following, the building element 1 can be used for both horizontal and vertical assembly in connection with the erection of various frame or stem constructions for buildings, and is connected to other building elements via appropriate screw-nut connections.

However, the building element can also be connected to other building elements via nail or wood screw connections, and thereby appropriately presents one of the embodiments shown in Figures 1b-1e.

In the embodiment according to Figure 1, two pieces of wooden slats 8 are embedded in each beam part 2,3.

Each of the wooden strips 8 can be provided with a waist 8a for anchoring in the respective beam part in connection with the embedment. In addition, in the respective wooden strip, a number can be carried out with a certain distance, for example 400 mm, in the corresponding beam part 2 or 3 cast-in transverse anchoring pins made of steel (not shown).

In the embodiment according to figure 1c shows

each beam part 2 and 3 a wooden strip 8 which has a wider width than the corresponding wooden strips shown in figure 1b.

Figure 1c also shows the difference compared to Figures 1a and 1b that two reinforcing wires 6 run back and forth between the beam parts. Furthermore, each of the beam parts shows 2 resp. 3, two longitudinal reinforcements 4 resp. 5.

In the embodiment according to Figure 1d, the second beam part 3 has a smaller height and width than the first beam part 2,

which thereby presents two wooden strips 8.

The embodiment according to figure 1e is similar to the embodiment according to figure 1c in the way that the two beam parts 2 and 3 are connected by two reinforcing wires running back and forth

6. However, since one beam part 3 has smaller dimensions than the other beam part 2, the threads 6 in the distance reinforcement form an angle with each other. Beam part 2

with larger dimensions also shows a built-in wooden strip 8.

Figures 1f-1k show examples of the design of beam-shaped building elements according to the invention for use as

.vertical support or support elements.- The embodiments according to figures 1i and 1j are open downwards in order to be placed on

a horizontal support beam (cf. figure 5).

These two embodiments as well as the embodiments

according to figure 1h are further open upwards to accommodate an upper support beam (cf. figure 6a).

Some embodiments, e.g. according to figure 1g, 1h

and 1k is instead or in addition, provided with upper resp.

lower closed recesses to accommodate support beams, which must therefore be introduced from the side.

Figure 1f shows an example of a building element

according to the invention provided with an upper and a lower side-

directed recess for interaction with upper or lower support beams (not shown).

The various design examples according to Figure 1f

-1k thus shows that support or support beams made according to the invention can be provided with differently designed and located recesses for interaction with horizontal support beams, trusses or the like.

Figure 11 shows an example of a cast truss

together of two beam-shaped building elements according to the invention,

s♦if thereby forming an angle with each other.

Figure 1m shows an example of a building element

according to the invention intended for use, such as a horizon-

tall beam and designed to be fitted together with e.g.

some of the support or support beams shown in Figure 1f-1k.

All of the building elements according to the invention shown in Figures 1f-1m are provided with two or more holes 1c intended to enable easy joining with further building elements by means of bolt-nut connection 25 (shown e.g.

in figure 3).

The procedure for producing beam-shaped building elements according to figure 1a is illustrated by figures 2a-2f.

For this purpose, a simple form 10 is used with a form base 11 that rests on two angle irons 12. Its vertical parts show side closures 13, which are pivotally connected to the angle irons 12 via longitudinal hinges 14. The form is even provided with gable closures (not shown).

Against the bottom of the mold, an upwardly tapering mold body 15 of sheet steel is placed, the height of which roughly corresponds to half the thickness of the finished element. As can be seen from figure 2b, two parallel strips 16 of foam plastic are placed on the mold body 15.

As can be seen from figure 2c, a reinforcement ladder is then placed which comprises a longitudinal reinforcement 4 or 5 and a reinforcing wire 6 running back and forth between these and binding together. When the reinforcing ladder 17 is placed, the foam plastic strips 16 are pressed together.

A downwardly tapering molded body 18, provided with

two parallel foam plastic strips 16 are then placed on the reinforcement ladder, after which the molded bodies, as shown in Figure 2d, are anchored using a number of bolts 19 arranged at an appropriate distance.

The upper mold body 18 and the reinforcement ladder 17

weight causes the foam plastic strips 16 to be compressed while forming seals which prevent concrete, which is then cast in the form, from penetrating into the space between the form bodies.

A perspective view of the mold with precast building element is shown in figure 2e. Shape and building element can in this t-mode, e.g. on a trolley, is driven to a place where the building element is allowed to harden, after which shaping takes place (figure 2f).

Serial production of building elements according to the invention can be carried out very quickly and easily with the described procedure and the molding equipment shown, and with low investment costs for molding equipment. Use of a loose sub-form according to Figure 2 means that, once the hardening process has begun, it can be detached from the mother form, which is cleaned and supplied with a new sub-form for renewed casting.

Figure 3 is a perspective drawing which schematically shows

a trunk for a house, which is built up using building elements according to the invention. The building elements thereby form vertical wall supports as well as horizontal support beams, beams or so-called sleepers. Furthermore, in the embodiment shown, somewhat modified building elements 1 of approximately the type shown in figure 1 form trusses. These can be described as consisting of legs 1b emanating from a central part 1a, which form an angle with each other.

Figure 3 also shows i.a. how simplified foundations can be carried out using beam-fortified building elements according to the invention. Instead of casting a plinth with e.g. 40-50 cm height, vertical support beams extended downwards and provided with recesses are used - e.g. according to figure 1h - at a distance from ground level and provided with recesses for a horizontal supporting beam, e.g., according to figure 1m, which carries joists which can also consist of beams according to figure 1m.

This possibility of achieving a simplified foundation results in significant cost savings, i.a. as the land planning work is reduced and further as no expensive foundation or plinth needs to be cast.

The building elements can be connected by means of bolt-nut connections 25, since the free space in the central part of the building elements can facilitate such joining. However, as can be seen from e.g. figure 4c, through holes 1c also be produced in the building elements for the passage of such joining bolts.

Figure 4a-4d schematically shows an example of a ♦procedure for foundation and anchoring of the lower part of the trunk to the base plate.

Holes 20a for foundation blocks, which are reinforced and cast with concrete, are thereby initially arranged in a ground base '20'. Before the concrete has hardened, holders 22 for beam support in the form of building element 1 are introduced into the cast blocks 21, which, when the concrete hardens, are anchored in the manner shown in figure 4b.

Figure 4c shows how a form side 23 is placed

against the holders 22, after which the substrate is filled and packed to the correct height.

The base plate 24 is then cast, and when the mold sides 23 are removed, the holders 22 are cast into the base plate 24.

Vertical wall supports in the form of building element 1 can then be placed and connected to the holders 22 by means of bolt-nut connection 25.

As can be seen from Figure 4d, the wall supports are supported by horizontal support beams in the form of building elements 1,

which in turn can support horizontal beams or so-called sleepers, also in the form of building elements 1. The horizontal beams 1 are connected to the wall supports by means of bolt-nut connection 25.

Figure 5 shows a modified foundation method,

where no base plate 24 is cast. Instead, the lower parts of the vertical wall supports are cast in the form of building elements 1, directly into blocks 21 embedded in the ground, after which horizontal support beams, likewise in the form of building elements 1, are inserted into recesses in the vertical wall supports. The horizontal support beams 1 are then allowed to support sleepers or beams in the form of building elements 1 according to the invention, which are connected to the vertical wall supports by means of bolt-nut connection 25. Additions in the vertical direction with several floors, possibly even so-called high-rise buildings, can then be built.

An example of fixing window and door frames in

a trunk to a house, is shown in figure 6a. Window frames 27 and door frames 28 are attached to vertical posts in the form of building elements 1, which are provided with upper and lower recesses, so that they can be inserted before this between upper and lower horizontal support beams. It is realized that a reliable construction is achieved which enables easy variation of window

and the vertical position of door frames.

Figure 6b shows the casting of a multi-storey house using building element 1 according to the invention. Other support beams in the form of building element 1 with smaller dimensions run perpendicular to the plane of the paper in upper recesses in vertical wall supports, which can consist of building elements of the kind shown in figure 1i. Horizontal beams, e.g. according to figure 1m, which form beam layers and are connected to the vertical support beams via bolt-nut connections 25.

Form or formwork members 32, e.g. of plywood - so-called plyfa form - using screw connection 33.

The outer form runs all the way up to the upper edge of the wall support, while the inner form extends to a level that corresponds to the ceiling height in the room.

The horizontal joist elements are also covered with form material 32 on the underside, which are also clamped by means of screw connection 33.

The space between the mold sides is filled with concrete to the lower edge of the upper beam layer. The vertical support beams are then applied to the next floor - indicated in the upper edge of Figure 6b - in preparation for casting the following day. These wall supports are placed on the horizontal support beams and screwed together with these and with the joist beams. Next, concrete is filled to the upper edge of the beam layer.

Shaping takes place the following day, after which the overlying floor plan is put in order for casting etc.

The building elements 1 occurring between the form sides 32 will be embedded in the concrete wall and thereby form a so-called permanent form.

Figure 7a shows an arrangement for providing a recess in the plinth in connection with a support beam in a house which is constructed using building elements according to the invention. A horizontal building element 1 according to the invention is thereby accommodated in the plinth and is allowed to support perpendicularly to this extending joist elements, which also consist of building elements 1.

Figure 7b shows how two support beams in form

of building elements 1 are arranged next to each other i

the base to allow for additional load.

Figure 7c shows a principled procedure for placing supports for facade elements, e.g. brick. For this purpose, specially designed support elements 30 are used, which are shown in Figures 7e and 7f. These are stacked in the manner shown in figure 7c, with certain spaces on horizontal support beams 1, which are placed in the plinth. Figures 8a-8d show some different arrangements for support elements against blocks or sole (figure 8a), support

for beams with long spans, where two or more building elements 1 are arranged next to each other (figure Sb) as well as support for the beam when joined. Figure 8c shows a suitable support element from the side, and figure 8d shows how two horizontal building elements are joined to each other using horizontal joining irons 38.

Figures 9a and 9b show two different examples of attaching a concrete plank to a building element according to the invention to provide a so-called permanent form. Pre-made wall elements 34 in the form of concrete planks are provided with abutments 34a which are limited by an inclined surface corresponding to . to the slope of the respective beam part 2. Inner wall element 35, which also consists of concrete planks, has corresponding abutments 35a.

When concrete is poured between the outer and inner walls 3 4 resp. 35, the shape of the protrusions 34a or 35a so that the building elements transfer the pressure exerted by the concrete. The wall elements 34,35 will thereby be anchored to the building element 1 while forming a so-called permanent form.

Figure 9b shows an arrangement modified in relation to Figure 9a, where the outer and inner walls 34' resp. 35' instead presents mutually abutting projections 34'a resp. 35'a, which is limited by parts without a slope. The abutments rest against the opposite side surfaces of the building element 1. In this embodiment, the outer and inner walls 34', 35' are further anchored

the building elements 1 by means of band 40. The fact that the building element 1 presents a recess in the area of its central part facilitates the casting of the walls and ensures an improved final

result. Thus, a continuous core of concrete along the entire wall is achieved.

The same applies if the space between the outer and inner walls 34,35 resp. 34', 35' are instead supplied with insulating material. This achieves a continuous insulation without thermal bridges in the area of building element 1.

Industrial applicability

On the basis of the above explanation, which only includes a few imaginary examples of the invention as well as how it can be used in practice to carry out various building constructions, it is clear to the person skilled in the art that the invention can be adapted in a number of other ways and can have a very versatile application within construction technology.

In particular, it applies that the building element does not need to have the shape shown in figure 1a, but can be modified in different ways, where the two beam parts 2 and 3 along certain parts of the building element are connected to each other and/or form certain angles with each other. Essential to the invention is that the building element presents two reinforced beam parts,

which is connected by a back and forth between them continuous wire, which forms a spacing reinforcement and which otherwise exhibits the properties stated above. However, it is clear to the person skilled in the art that different types of special elements can be made for special purposes, and depending on the stated requirements, a different design than the basic form of the building element can be given without deviating from the basic idea of the invention.

Claims (12)

1. Beam-shaped building element comprising a beam part (2) provided with longitudinal reinforcement (4) made of castable and hardenable material, such as concrete, and a second beam part (3) running at a distance from the beam part, which is connected to the first beam part via a wire (6) running back and forth between the beam parts, characterized in that the second beam part (3) also consists of castable and hardenable material, such as concrete, and is provided with a longitudinal reinforcement (5) and that the back and forth between wire (6) running through the beam parts is connected to each of the beam parts' longitudinal reinforcement under the connection of the beam parts into a light, moment-stiff, force-absorbing unit with integrated reinforcement. 2. Building element according to claim 1, characterized in that both beam parts (2,3) consist of the same hardenable material with intermediate parts that connect the beam parts. 3. Building element according to claim 1 or 2, characterized in that at least one of the sides of the beam parts presents a longitudinal wooden strip (8), which is embedded in the beam part or connected to it in another way, and arranged to facilitate the connection of the beam part with another building element using nail or screw connection. 4. Building element according to any one of claims 1-3, characterized in that the side surfaces of the beam parts (2,3) and surfaces facing each other are substantially flat. 5. Building element according to claim 4, characterized in that the beam parts (2,3) taper in the direction towards each other. 6. Method for producing a beam-shaped reinforced building element (1) comprising two parallel, reinforced beam parts (2,3) running at a distance from each other of castable and hardenable material, such as concrete, characterized in that in a form (10) which is provided with side and gable closures (13) as well as a central, upwardly tapering form body (15) whose height roughly corresponds to half the thickness of the finished element, a reinforcement ladder (17) is introduced which comprises a longitudinal reinforcement (4,5) for each beam part and a reinforcing wire (6) which connects these, which runs back and forth between the longitudinal reinforcements (4,5), that a similar downwardly tapering form body (18) whose height roughly corresponds to half the thickness of the beam element is then introduced into the form and is anchored in relation to the first, and that concrete or other hardenable material is poured into the form and vibrated and allowed to harden. 7. Method according to claim 6, characterized in that the reinforcement ladder (17) is placed on strips (16) of foam plastic or similar material on the lower mold body (15), which strips are compressed under the influence of the weight of the reinforcement ladder and the upper mold body while forming a seal for the cast concrete or equivalent, so that the central part of the reinforcement ladder (17) is substantially free of concrete. 8. Method of making a frame or stem for a building or a part of such using beam-shaped building elements (1) according to any one of claims 1-5, characterized in that the building elements (1) are used both as vertical wall supports and horizontal supporting elements, which are connected by means of screw connections (25), and that the free space between the parts of the building elements in the area of the central part of the reinforcing wire (6) is used to facilitate the placement of window and door frames (27,-28) or the like between the building elements, or for wiring, insulation or the like. 9. Method according to claim 8, characterized in that when the building elements are screwed together, form sides (32; 34, 35) are placed at these, possibly in the form of prefabricated wall elements, after which concrete is poured between them, the concrete flowing between the beam parts forming an essentially continuous wall, in which the building elements form a so-called permanent form. 10. Method according to claim 8, characterized in that outer walls, insulation and inner walls are placed on the frame or trunk made up of the building elements, the insulation being passed through the space between the parts of the building elements to form a substantially continuous insulation with the avoidance of cold bridges along the wall. 11. Method according to any one of claims 8-10, characterized in that a truss comprising similar building elements is placed on the frame or stem by means of a screw connection, the outside and inside of which are provided with a cladding of concrete elements. 12. Method according to claim 8 using a building element (1) with beam parts (2,3) tapering towards each other, characterized in that a wall element (34,35), suspended ceiling element, joist element, subfloor element or the like is placed between the building elements (1) , provided with protrusions (34a, 35a) with an inclined and/or "ledge-shaped surface corresponding to the shape of the beam parts (2,3) in the contact surface with these, whereby the elements in question can be fixed to the building elements (1) under the influence of one against the latter exerted force without the use of external form or the like (figure 9a). ♦