EP0593017A1 - Connection element - Google Patents

Abstract

The invention relates to connection elements for retrofitting wooden load-bearing beams projecting out of the outer wall surface in the longitudinal direction. The object of the present invention is thus to provide a device, with the aid of which it is possible to introduce load-bearing beams, projecting out of the structural body and intended for balconies, etc., into the already erected structural body in a simple manner, without impairing the visual appearance and the statics, and to exchange or re-adjust such a load-bearing beam without difficulty at a later date. It is thus proposed that the connection elements (4, 5) be characterised by a wall part (4), which is fastened in the structural body and is intended for receiving the insert end (7) of the load-bearing beam, and a beam part (5) which is connected to the load-bearing beam and is adapted to the wall part (4). <IMAGE>

Description

Especially in southern Germany, balconies on residential buildings are increasingly not being created using a load-bearing concrete slab, but rather using support beams that protrude from the building, even if the floor ceilings consist of in-situ concrete.

The subsequent attachment of these balcony supporting beams creates problems: If the balconies to be supported with them have a long running length, a large number of such supporting beams, sometimes more than 30 pieces, often have to be introduced into the building. According to the conventional design, a lot of work and time is required in that deep holes have to be made from the outside in the created structure, into which the supporting beams with their insert ends must then be inserted, aligned exactly with the wall and with each other and fastened. In view of the high labor costs, this means a considerable cost factor, which increases continuously with an increasing number of supporting beams to be installed in this way, due to the growing difficulties in aligning the beams well with one another. Another disadvantage of this solution is that in the event of subsequent severe distortion or damage to such a support beam, e.g. due to weather conditions, replacement is only possible with relatively great difficulty and side work.

It is therefore the object of the present invention to provide a device with the aid of which it is possible to simply insert supporting beams for balconies, which project from the building structure, into the building structure which has already been created, without optical and static disadvantages, and later easy replacement or readjustment of such a supporting beam.

This object is achieved by the characterizing features of claim 1. Advantageous embodiments result from the subclaims.

The wall part incorporated into the structure creates space at a defined position with prepared fastening options for the end of the supporting beams to be inserted, even within a concrete slab to be poured on site, whereby the work steps involved, such as the introduction of structural steel and circumferential tie rods in the concrete slab, must also be taken into account.

The beam part connected to the supporting beam before it is introduced is adapted to the design of the wall part and is connected to it, thereby creating a releasable, fixed, adjustable connection of the supporting beam to the structure.

It should be taken into account that in a supporting beam loaded by a balcony, in the upper part of the cross-sectional area, this supporting beam is subjected to tension (away from the building structure), in the lower cross-sectional area, however, to pressure (towards the building structure), which means that the structure facing the building structure , the rear end face of the support beam is supported with its lower area on the structure.

The wall part can be integrally formed so that it creates the necessary cavity for inserting the support beam by its design, or it can create a cavity especially during concreting the ceiling, a separate receiving box be used, which has little inherent stability and does not contribute to the stability of the later connection between the wall part and the beam part. This can be, for example, a plastic hollow body that is loosely connected to the wall part, or a foam block that can be easily pulled out or cut out, etc. after the ceiling has been finished.

The connection between the wall part and the beam part is preferably made on the end face via screw connections which run in the vertical plane and in the direction of the tensile stresses of the supporting beam that occur. The tensile stresses are passed on in that the wall part has at least one tie rod, which runs from the screw connection to the beam part towards the rear, and which is preferably cranked into its rear region in order to ensure good anchoring in the surrounding concrete. This tie rod is preferably made of structural steel with the known corrugated surface, which also supports the anchoring of the steel in the concrete. The offset is preferably made within a horizontal plane in order to remain independent of the height of the concrete ceiling.

As a rule, these will be two symmetrically arranged and welded tie rods, which are connected in the front area with threaded bolts, which are part of the wall part, and strive horizontally against the support beam from the front side and essentially screwed together with one serve vertically standing, belonging to the beam part tension plate, in which vertically standing elongated holes are arranged at the appropriate position.

The threaded bolts extend through these elongated holes and are secured by nuts. The beam part In addition to the vertical tension plate, it has, above all, a substantially horizontally extending support plate, which rests on the top of the support beam or is embedded in it, and is connected to it by means of nails or screws. So-called GEK dowels, which resemble nail plates, are particularly suitable for this.

If the wall part is used for pouring in a concrete ceiling, in which the outer edge of the concrete ceiling is not created by means of removable formwork, but by means of so-called facing stones, which are built around the edge of the ceiling and prevent the concrete from flowing off to the side, the the cavity required for the end of the supporting beam is already created by a vertical plate serving as a front support for the wall part, which preferably has exactly the height of these facing stones.

The inside of the facing stones as well as the plate placed directly in between creates a continuous surface that runs around the entire concrete ceiling and reliably prevents the concrete from flowing out laterally.

If the plate itself is involved in the transmission of these tensile forces, for example by connecting the threaded bolts to the plate on the one hand and the tie rods striving on the other side also being connected to this plate, this plate must be of sufficiently large dimensions.

For reasons of weight and cost savings, however, it is also possible to connect, preferably weld, the threaded bolts directly to the solid, heavy tie rods. The plate is then dimensioned very weak and preferably only with the Threaded bolt connected and only serves to create a contact surface for the in-situ concrete.

In this case, the plate does not even have to consist of metal. Preferably, however, this plate will have a leg that struts horizontally forward at the lower end, towards the support beam, which then creates a height-defined contact surface for the beam part and thus the height of the mounted support beam when the beam part is fastened.

Tie rods and threaded bolts can be functionally combined by using a long, continuous, sufficiently strong threaded rod. This protrudes with its front end through the vertical plate of the wall part or the rear wall of the receiving box, and is connected to it by screwing, gluing or welding.

The rear part of the threaded rods preferably extends through a transverse element that fixes the two threaded rods in the rear area at a distance from one another, for example a flat iron, through the bores of which the threaded rod extends, and is secured in tension by means of screwed-on nuts, which are additionally secured with the transverse element can be welded.

The cross element protrudes laterally beyond the threaded rods so that there is sufficient lateral anchoring of the cross element in the concrete, ie by at least 5 cm, preferably up to 15 cm.

In addition, the threaded rods can be bent downward with their ends projecting beyond the transverse element at the rear. An additional anchoring of the threaded rods is achieved.

The thread profile along the entire length of the threaded rod serves a similar purpose to the corrugation of the construction steel otherwise used, namely to improve the adhesion in the surrounding concrete.

The tie rods, like the threaded bolts, are located in the upper area of the wall part and thus also in the upper area of the support beam to be used later, i.e. in the area in which the tensile stresses occur later.

In addition to supporting the wall part in the front area, additional support for the tie rods in the rear area is necessary.

This is achieved by means of a vertical support which has at least one horizontally extending base plate at the lower end, with at least one hole through which this support can be positioned for the concrete ceiling by nailing it to the formwork underneath. It is important that the height of this rear support is variable, depending on whether the support can be placed directly on the formwork defining the underside of the concrete ceiling or on an element above it, for example structural steel already laid or other elements.

For this purpose, the rear support is designed to be height adjustable.

Furthermore, one or preferably several stabilizing struts extend from the rear area of the tie rods, which can be designed much weaker than the tie rods themselves, from the rear area of the high-level tie rods to the front, lower area of the wall part, ie for example the vertical plate, which serves as a support in the front area.

These stabilizing struts run obliquely from the back to the bottom in the wall part, where they are at such a height that the so-called ring anchors arranged in the outer area of the concrete ceiling, i.e. ring-shaped structural steel bars running around the concrete ceiling, are neither pressed down by the wall part, nor otherwise Prevent assembly of the wall part.

For special ceiling constructions with very high-lying ring anchors, the stabilizing strut cannot be formed in one piece with the wall part, but can be retrofitted in order to be able to position these stabilizing struts below circumferential ring anchors.

The threaded bolts protrude laterally from the concrete ceiling and are preferably galvanized.

Before the support beam is inserted, the wall part is connected to it along the upper, the support plate, the beam part. The front rear end of the support beam must not fully reach the vertical tension plate of the beam part, because at least in the upper area between the tension plate and the rear face of the support beam, there is enough space to place the lock nuts on the ends of the threaded bolts, which extend into it, and for Tightening these lock nuts must be in place.

For this purpose, the tension plate of the beam part is designed so that it cannot be pushed right up to the opposite end face of the vertical plate of the wall part. The vertical tension plate of the beam part has either a crank or a leg that struts vertically above or below, in particular away from the beam, which secures a relevant distance from the vertical support plate of the wall part.

However, this distance is at most as large as the depth of the facing stones, so that the locking nuts subsequently screwed onto the ends of the threaded bolts are located in the area of the outer wall surface, for example just inside the outer wall surface.

This means that on the one hand a defective, broken or rotten support beam can be replaced later easily and without major masonry work, or a heavily warped or lowered support beam can be lifted back into the horizontal position by tightening the locking nuts.

For this purpose, it is necessary that the vertical tension plate of the beam part is supported on the opposite vertical plate of the wall part in the lower area due to the described offset or a horizontal leg, while in the normal assembly state the upper area of the tension plate of the beam part is a distance from the upper area the plate of the wall part.

Another form of training consists in connecting the wall part and the beam part not with a screw connection, but with a locking element that acts in a form-fitting manner but is adjustable. Because the disadvantage of the screw connection solution is that the lateral free ends of the tension plate of the beam part, in which the elongated holes for the screw connection are located, must be made of very strong material in order to be able to absorb the required tensile forces. In the case of training with a bolt part, weaker dimensions are possible.

For this purpose, the receiving box preferably also has an upper cross plate, on the underside of which, at the front area, stop bodies extend inwards from the side surfaces of the receiving box, so that there is a gap in the middle between the two stop bodies. This gap is preferably approximately as wide as the width of the beam plate of the beam part.

The horizontal beam plate is cranked with the vertical tension plate of the beam part and is preferably made in one piece, at right angles, the tension plate extending at least about 4 - 5 cm from the beam plate downwards and resting against the rear end face of the beam.

A cavity is no longer necessary at this point, since screwing no longer has to be carried out here. On the rear end of the beam plate, i.e. in the area of the offset, a counter body is applied transversely to the longitudinal direction of the beam and thus the beam plate, which protrudes upwards from the beam plate and has a transverse extension that is slightly shorter than the gap between the two Stop elements of the wall part. Thus, during assembly, the beam part can be pushed into the cavity of the wall part in such a way that the counter body is pushed through the gap between the two stop bodies of the wall part and is then located behind these stop bodies.

A locking body, which can also be a square steel, is now used for the positive connection, as is also the case with the stop bodies and the counter body. This bolt body is longer than the gap between the two stop bodies and is slightly oblique in the transverse direction between one of the stop bodies and the Counter body inserted up to the side wall of the receiving box, whereupon it can be aligned with the counter body and shifted somewhat in the opposite direction and thus engages behind both stop bodies.

In this position, the stop body is secured in that through two through-holes, which are located in the bilateral edge areas of the gap between the stop bodies, by introducing screws, on the one hand, transverse displacement and thus removal of the locking body is prevented and, on the other hand, support is achieved on the counter body .

By further screwing in or unscrewing these screws, the inclination of the beam can thus be adjusted and its lateral orientation to the wall can also be influenced to a small extent.

A particularly simple design of the front part is possible in that structural steel rods are used as tie rods and are welded laterally to the side walls of the receiving box and extend parallel to the rear and are cranked inwards only in the rear area, so that their free ends touch and are welded to one another are.

A simplification would already result from the fact that instead of two tie rods only one tie rod, e.g. a threaded rod is used, which makes assembly easier due to only a single lock nut and also makes pre-assembly of the wall part easier.

In such a solution, of course, the tie rod itself must have a correspondingly larger dimension, and the cross plate would also only be supported at a single point, namely the passage of the tie rod. Farther it would no longer be possible to crank the tie rod at the then required thickness of the threaded rod in the cold state without tearing the material.

If the cranking of the rear ends of the threaded rods could be completely eliminated, fastening with the cross plate would also be easier.

These problems are solved by the fact that the threaded rod runs horizontally through the back of the receiving box and also runs horizontally to the front, i.e. into the receiving box, but the area behind the receiving box is bent slightly downwards without kinking with the largest possible radius, so that the rear end of the threaded rod comes to lie at a height at or below the center of the height of the receiving box, which corresponds to the height of the future concrete ceiling.

With this free and non-cranked end, the cross plate can simply be screwed together using a strong retaining nut and a weaker locknut, so that the cross plate is no longer vertical, but slightly inclined, approximately in the middle or even in the lower third of the concrete ceiling and with its vertical central axis about the screwing point between the beam part and the wall part, i.e. the front end of the threaded rod located in the receiving box.

Because the threaded rod has no kink in its course, there is a very good absorption of the tensile forces via the threaded rod on the cross plate.

Furthermore, the cross plate can be welded beforehand with the height-adjustable support for the rear end of the wall part, so that the preassembly of the wall part only involves screwing on the cross plate and Includes support on the rear end of the threaded rod, and the simple welding of a stabilizing strut, which is welded approximately horizontally between the lower edge of the cross plate and the rear of the receiving box.

At the receiving box, this stabilizing strut, which can consist of an approximately 10 by 10 mm thick square steel, ends at about a third of the height of the receiving box.

Because the threaded rod is also screwed to the receiving box only by means of nuts on both sides and is not welded, the parts of the wall part which are exposed to the weather for long periods, namely the receiving box and the threaded rod, can be separately hot-dip galvanized or nickel-plated, while the others, in Parts enclosed in concrete, such as stabilizing struts and height-adjustable supports with their individual parts, do not have to be surface-treated.

In order to dissipate the tensile forces from the supporting beams with as little force diversion as possible, the beam part is also cranked or angled as little as possible:
The beam part consists of a beam plate, which is narrower than the top of the beam, and is screwed to the top of the beam by screwing strong wood screws through the holes along the tension plate into the beam.

There are nail plates between the beam plate and the beam, which also have a central hole through which the screw runs. By screwing the nails of the nail plate are additionally pressed into the beam, so that there is a frequently positive connection between the support beam and the beam plate.

At a distance and aligned with the longitudinal center axis of the beam plates, there is a tension sleeve which is welded to the beam plate via external cross members.

This creates enough free space between the tension sleeve and the rear end of the beam plate in order to be able to insert and screw on a locking nut on the front end of the threaded rod, which is pushed through the tension sleeve in the direction of the beam plate, which is then still located within the receiving box.

To insert the support beam, the support beam is therefore cut out at its rear, upper end so that the beam part can be screwed to it without this being visible on the beam in the side view by not cutting out the side cheeks of the beam, but only a strip in the middle range.

Since the lock nut remains accessible from above due to the space between the crossbeams even after a month's work, the additional screwing in or screwing back of the locknut can adjust the inclination of the support beam relative to the building and, if necessary, the entire support beam can be replaced.

Fig. 1

eine Seitenansicht von Wandteil und Balkenteil während der Montage des Tragbalkens,

Fig. 2

eine Aufsicht auf die Gegenstände der Fig. 1 im montierten Zustand,

Fig. 3

eine Seitenansicht einer anderen Gestaltung von Wandteil und Balkenteil,

Fig. 4

eine Aufsicht auf das Wandteil gemäß Fig. 3.

Fig. 5

eine Aufsicht auf eine andere Ausführungsform des Wandteiles, und

Fig. 6

eine Seitenansicht des Wandteiles gemäß Fig. 5.

Fig. 7

eine weitere Ausführungsform in Seitenansicht,

Fig. 8

eine Aufsicht auf die Lösung gemäß Figur 7,

Fig. 9

eine Detailansicht zur Figur 8,

Figur 10

eine teilweise geschnittene Seitenansicht eines anderen Verbindungsteiles und

Figur 11

eine Aufsicht auf die Lösung nach Fig. 10.

An embodiment according to the invention is described in more detail below by way of example. Show it:

Fig. 1

a side view of the wall part and beam part during assembly of the support beam,

Fig. 2

1 in the assembled state,

Fig. 3

a side view of another design of the wall part and beam part,

Fig. 4

3 shows a top view of the wall part according to FIG. 3.

Fig. 5

a supervision of another embodiment of the wall part, and

Fig. 6

5 shows a side view of the wall part according to FIG. 5.

Fig. 7

another embodiment in side view,

Fig. 8

7 a top view of the solution according to FIG. 7,

Fig. 9

8 shows a detailed view of FIG. 8,

Figure 10

a partially sectioned side view of another connecting part and

Figure 11

a supervision of the solution according to FIG. 10.

1 shows a side view of both the wall part 4 and the beam part 5.

With regard to the wall part, it can be seen that the wall part with its plate 22 or its lower, horizontal leg 25 rests on the masonry under the resulting concrete ceiling in such a way that the outer end face 23 is located in the region of the adjacent facing stones 29, and the lower, horizontal leg 25 of the plate 22 does not protrude from this area of the building.

The tension plate 11 of the beam part 5 opposite the plate 22 sits with its lower, horizontally extending leg 28 on the horizontal leg 25 of the wall part 4. By an offset between this leg 28 and the upper region of the tension plate 11 there is a distance between the plate 22 and the tension plate 11 even when the beam part 5 is pushed in the lower region until it abuts the plate 22 in the upper region, but then protrude Threaded bolts 26 through the elongated holes 13 in the upper region of the tension plate 11 into the free triangular space between the tension plate 11 and the rear end of the beam 2.

For this purpose, the rear end face of the insert end 7 of the beam 2 is beveled in accordance with the oblique cranking of the tension plate 11, this bevel continuing upwards, so that in the upper region there is a free space for the locking nuts 30, which, for example, in the assembled state of FIG 2 are shown.

Fig. 1 further shows that the tie rods 15 striving from the plate 22 towards the rear, ie away from the beam, are fastened in the upper region of the plate 22 and not directly with the threaded bolts 26 but with the plate 22, which is why this one must have sufficient stability to transmit the tensile forces in the tie rod 15.

At the rear end of the tie rod 15, the vertically downwardly projecting support 20 can be seen, which is inserted in a bushing 17 and is fixed there in its height by means of a clamping screw 16 with a corresponding handle.

At the lower end of the socket 17, the base plate 18 with the bore 19 can be seen, through which nailing to the underlying formwork 12 is possible in order to sufficiently secure the position of the wall part so that it does not change when the concrete ceiling is poured.

Fig. 2 shows a plan view of this arrangement, but the support beam 2, of which the insert end 7 can be seen, is already screwed to the wall part 4. The vertical tension plate 11 of the beam part is located in the area between the facing stones 29, and thus within the outer surface of the building.

It can also be seen that the beam plate 10 mounted on the support beam is considerably narrower than the support beam and is connected to it at many points, so that the locking nuts 30 lie outside the beam plate 10 and are easily accessible from above.

With regard to the wall part 4, the top view shows the crank 15 that extends outwards in the rear area of the tie rods 14, as well as the welding of the two tie rods 14 in the rear area near the crank 15. The two tie rods 14 run from there diagonally forward and reach the vertical plate 22 in its outer region.

A somewhat different embodiment of the wall part 4 is shown in the side view of FIG. 3, similar to FIG. 1:
There, the tie rods 14 are welded directly to the threaded bolts 26, while there is no direct connection between the tie rods and the vertical plate 22, which serves as a front support of the wall part 4.

The tensile forces transmitted from the wall part 4 in the upper region are thus transmitted directly from the threaded bolts 26 to the tie rods 15.

The plate 22 is welded to the threaded bolts 26, since it itself does not transmit any tensile forces, but only has to represent a boundary surface for the fresh concrete, and is much weaker.

The stabilizing struts 21, which are in turn fastened in the lower region of the plate 22, are also used to fulfill this retention function. In contrast to the embodiment in FIGS. 1 and 2, they are not arranged in a straight-line, but cranked manner, so that they initially start from the plate run horizontally to the rear in order to then run relatively steeply upwards to the connection point of the two tie rods 15.

The tie rods 15 themselves are in turn arranged in a horizontal plane in the upper region of the plate 22, but - as can be seen in FIG. 4 - are configured differently:
In addition to the lateral offset in the rear area, the two tie rods 15 run forward from there at a smaller angle than in the solution according to FIGS. 1 and 2, namely at an angle of approximately 10 to 25 °.

Only in the foremost area, in which the connection to the threaded bolts 26 takes place, is there a further offset to the outside, so that these two offset areas extend at a substantially larger angle of approximately 60 ° to 80 ° to one another.

This makes it possible to screw the threaded bolts directly above or below these front ends Tie rods 15 parallel to each other and thus obliquely to the cranked ends of the tie rods 15 to be welded to them. Due to the oblique overlap and the fact that the screw head rests on the tie rods, there is sufficient space for stable welds. The galvanic nickel coating of the threaded bolts does not prevent welding with the structural steel of the tie rods 15.

In addition, in Fig. 3 the bar part is also designed differently, in that the plate 11 does not have a horizontal leg 28 at the lower end, but instead points vertically downwards, after passing through the offset between the upper and lower vertical region of the plate 11. Such a horizontal leg is rather arranged at the upper end of the vertical plate, striving against the wall part 4. It serves as a spacer to the vertical plate 22 of the wall part in order to limit the maximum possible inclination of the beam part 5 when tightening the wall part.

In Fig. 5 only another version of a wall part is shown.

The threaded bolts for screwing to the beam part and the tie rods are each functionally combined, in this case in a continuous threaded rod 46. The wall part 4 comprises two such threaded rods 46, which are parallel to one another according to FIGS. 5 and 6, but can also be arranged to run towards one another .

A receptacle box 24 with a cup-shaped shape serves as the front support, the open side of which is directed towards the insert end 7 of the supporting beam 2 to be received. Threaded rods 46 extend through the rear wall and are connected to it.

The threaded rods 46 are secured, possibly welded, in the rear area by means of screwed-on lock nuts 30 against being pulled through by a cross element 51, a flat iron with corresponding bores. In order to increase the tensile load of the threaded rods 46 beyond the load capacity of the thread of the locking nuts 30, the threaded rods 46 are bent downward behind the crossbar 51 and the locking nuts 30.

The front connection of the threaded rods 46 to the rear, vertical wall 22 of the insert 24 can either be a fixed connection, e.g. Welding if the insert 24 is made of sheet steel.

The stabilizing struts 21 run from a point of the cross element 51 which is as far out as possible either to a point of the threaded rod 46 which is as far forward as possible but still behind the insert part 24, or directly to a point on the back of the insert part 24, if this is so stable is that it can absorb and transmit appropriate tensile forces itself.

Figure 7 shows a side view of another embodiment.

The receiving box 24 of the wall part has an upper plate 63 which extends to the front edge of the masonry. In contrast, the lower cross plate only extends to about the front half of the cavity 6 to the rear.

8, only one of which can be seen in FIG. 7, is welded to the underside of the front edge of the upper cross plate 63.

The tie rods 14, consisting of structural steel rods, are welded on the outside of the side walls of the receiving box 24 and run horizontally parallel to the rear. In the rear area they are cranked inwards in the horizontal plane and welded at the point of contact, as can be seen better in FIG. The support 20 at the rear end consists of a U-steel with legs of unequal length, the shorter legs of which at the connection point of the tie rods 14 initially strive upwards and then further backwards and downwards.

The beam part 5 consists of a flat steel cranked at right angles with a horizontal, recessed beam plate 10, the tension plate 11 projecting vertically downwards.

This lies on the rear end face of the beam 7 and is supported on this.

Since the tension plate 11 extends essentially only over half of the end face downwards, the beam in the lower region in its rear end face can either be formed obliquely to the rear or cranked rearward to abut the inside of the cavity 6 in the lower region.

On the top of the beam plate 10 near the rear end of the counter body 61 is welded transversely, which is again a square steel of 15 x 15 mm cross section. The longitudinal extent of the counter body 61 in the transverse direction is slightly smaller than the gap between the stop bodies 62, so that the bar can be inserted therebetween.

As FIG. 7 shows, the stop bodies 62 and the counter body 61 partially overlap in height.

In the solution shown in FIGS. 7 and 8, the locking body 60, which is longer than the gap between the stop bodies 62, is first inserted with one end between a stop body and the counter body, aligned with the counter body and moved in the opposite direction, so that it engages both stop body 62.

In this position, locking takes place in the position shown in FIG. 8 by screwing screws 65 into the two through-threaded bores 64 of the locking body 60, which are supported on the counter body 61 and can thereby support and adjust the inclination of the beam 7.

The two holes 64 are located in the outermost regions of the gap between the stop bodies 62, so that after they are screwed in, the locking body 60 cannot be moved in the transverse direction.

FIG. 9 shows a detailed illustration according to FIG. 7, in which the height of the through hole 64 and the screws 65 is shown. With the locking part 60 resting on the support plate 10, this must be selected such that, on the one hand, it is possible to insert the screws below the stop body 62 and, on the other hand, these screws can be supported on the rear of the counter body 61.

Figures 10 and 11 show another solution of the connecting part in the fully assembled state.

It can be seen in the side view of FIG. 1 that the receiving box 24, the rear wall 27 of which is penetrated by the single threaded rod 46, is seated directly on the outer wall 31 and in terms of height and width should preferably correspond to the dimensions of the facing stones.

The receptacle is open to the outside, but is completely enclosed on the other sides. As a rule, the receptacle box is made of hot-dip galvanized sheet steel of about 2 - 5 mm thick.

The threaded rod 46 is pushed through a corresponding hole in the rear wall 27 as close as possible below the upper side of the receiving box 24 and a locking nut 30 is placed on the outwardly projecting, front free end of the threaded rod. The threaded rod penetrates the approximately vertical rear wall 27 horizontally and here runs parallel to the top plate of the receiving box.

The threaded rod 46 is connected to the rear wall 27 only via relatively weakly dimensioned lock nuts 34 screwed on both sides.

Immediately behind the rear wall 27, the threaded rod 46 curves downward with such a large radius 39 that the approximately half a meter long threaded rod with its rear end 47 is approximately at the height or just below the center of the height of the receiving box 24 and at an angle of ends about 10 ° to 30 ° with respect to the horizontal.

It is important that the threaded rod 46 does not have a kink at the transition between the straight, front end and the bend, but that there is a continuous bend, on the one hand to avoid any damage to the threaded rod and thus impair its tensile strength, and on the other hand to keep the force flow as straight as possible to achieve within the threaded rod 46.

Due to the bending of the threaded rod 46 with the radius 39, which is approximately 1 meter, the cross plate 51 is located, which is screwed onto the free rear end 47 of the threaded rod 46 by means of a lock nut 29 and a lock nut 37, approximately at the middle or between the lower third and the center of the receiving box 24, and is directed obliquely upwards with its longitudinal median perpendicular approximately against the screwing point between the wall part 4 and the beam part 5.

The transverse plate 51 is thus approximately in the middle of the cross section of the concrete ceiling.

In addition, their normal force is directed against the screwing point between the wall part and the beam part, and thereby brings about a large degree of correspondence between the theoretical force direction and the practical force flow through the threaded rod 46.

As a result, the cross plate 51 can be screwed to the rear end 47 of the threaded rod 46 during assembly.

The once positioned wall part is fixed in the front area by inserting the receiving box between the facing bricks and in the rear area by nailing the base plate 19 of the support 20 to the underlying formwork 12 via the hole 19. The height is achieved by clamping the support in the sleeve 17 reached by means of the clamping screw 16. In order to avoid bending etc. of the positioned wall part, a stabilizing strut 21 is additionally welded between the lower end of the transverse plate 51 and the lower third of the rear wall 27 of the receiving box 24. Thereby the downwardly curved threaded rod 46 becomes much more resilient before the concrete ceiling is poured, and can be easily walked on when attaching the structural steels etc.

For further stabilization, strong ring anchors are usually installed near the outer circumference in the concrete ceiling, which run in the middle of the height of the concrete ceiling, and thus usually between the stabilizing strut 21 and the threaded rod 46.

To insert the supporting beams 2, their insert ends are first cut out accordingly to allow the beam part 5 to be installed:

In the top of the support beam 2, a longitudinal recess 48 is first milled or worked out in some other way, but the side flanks of the support beam remain undamaged, so that the recessed part of the beam cannot be seen later from the side, i.e. the underside of the balcony, etc. is.

This longitudinal recess 48 is deepened from the beginning of the outer cross member 36, since these have a greater vertical extent than the tension plate 11.

In addition, the insert end 7 of the support beam is completely recessed in the upper area, so that only the lower third or the lower half of the free rear end of the beam remains intact.

With this lower part of the cross-sectional area, the support beam 2 is supported on the rear wall 27 of the receiving box 24, as a result of which the pressure loads occurring in the lower beam part are transmitted to the building.

The beam part 5 thus consists, in addition to the tension plate 11, of a tension sleeve 35, the axis of symmetry of which is aligned with the longitudinal central axis of the tension plate 11 and the tension sleeve 35 is arranged at a distance from the rear end of the tension plate 11, in order to insert a lock nut 30 with a washer 33 in this area and to be able to screw.

Both parts are welded together via fixed longitudinal cross members, generally upright flat bars, so that the tensile forces which occur are transmitted from the beam to the tension sleeve 35 without substantial force diversion.

The arrangement of the tension plate 11 on the insert end 7 is such that when the insert end is in contact with the rear wall 27 of the receiving box, the pull sleeve 35 and also the locking nut 30 and the free front end of the threaded rod 26 are still inside the receiving box.

Since the recess of the upper half in the longitudinal direction of the beam is no longer than the depth of the receiving box, the screw connection arranged inside the receiving box is no longer visible from the outside, i.e. from the side or from below, when the supporting beam is installed.

However, the screw connection remains accessible from above.

The tension plate 11 is screwed to the supporting beam 2 by means of wood screws 38, nail plates 43 being inserted therebetween, which likewise have a bore through which the wood screw 38 extends, and the nails of which are tightened by tightening the wood screw 38 are pressed down into the support beam 2 and thus give a very good positive connection between the tension plate 11 and support beam 2.

The entire beam part 5 is surface-coated due to the weather, preferably hot-dip galvanized. The wood screw 38 and the nail plate 43 are also used in a surface-protected manner.

The tension sleeve 35 is to be made long enough to ensure a sufficient connection length with the outer cross members 36. Furthermore, the wall thickness of the tension sleeve 35 must be sufficiently strong to transmit the tensile forces of approximately 3 tons. A minimum wall thickness of about 5 mm is also necessary because in the space between the outer cross members 36, which are in direct contact with the outer wall of the tension sleeve 35, the lock nut 30 must find space and must also be rotatable.

In addition, the inner diameter of the pull sleeve 35 must be so much larger than the outer diameter of the threaded rod 46 that an angular offset between the pull sleeve 35 and the rear end of the threaded rod 46 by up to 10 ° or even 15 ° is possible, if this is a subsequent beam distortion or an accidental oblique installation of the wall part 4 make this necessary.

In the case of a threaded rod 46 with an outer diameter of 15 mm and a length of the tension sleeve 35 of approximately 40 mm, the inner diameter of the tension sleeve should be at least 25 mm. The inside diameter of the threaded sleeve should therefore be larger than the outside diameter of the threaded rod by the quotient from length to inside diameter of the threaded sleeve.

Claims (14)

Connecting parts for retrofitting wooden beams that protrude from the outside of the wall in the longitudinal direction,
marked by - A in the structure (31) attached wall part (4) for receiving the insert end (7) of the support beam (2) and - A with the support beam (2) connected to the wall part (4) adapted beam part (5). Connecting parts according to claim 1,
characterized in that
the wall part (4) has a receiving box (24) which creates the cavity (6) for receiving the insert end (7) of the supporting beam (2) in the structure (31). Receiving box according to one of the preceding claims,
characterized in that
the wall part (4) and the beam part (5) can be connected to one another at the end face by means of a screw connection. Connecting parts according to one of the preceding claims,
characterized in that - The wall part (4) at least one, essentially has a horizontally extending tie rod (14) which extends from the end face (23) of the wall part (4) facing the insert end (7) of the beam (2) towards the rear into the structure (31), - At least two threaded bolts (26) from the end face (23) to strive in the opposite direction on the support beam (2) and are firmly connected to the tie rods (14), and - The beam part (5) has a substantially perpendicular tension plate (11), in the slots (13) are arranged so that the threaded bolts (26) of the wall part (4) can extend through them. Connecting parts according to claim 4,
characterized in that - In the upper, front area of the cavity (6) on both sides inwards, transversely to the direction of the beam (7), stop bodies (62) extend inwards, - The beam plate (10) and the tension plate (11) are cranked, formed in one piece and the tension plate (11) lies against the rear end face of the beam (7), - On the rear end of the beam plate (10) a counter body (61) is applied so as to project upwards, the transverse extent of which is slightly shorter than the gap between the two stop bodies (62) of the wall part (4) - When the beam part (5) and wall part (4) are connected, a locking body (60) is arranged between the stop bodies (62) and the counter body (61), the transverse extent of the locking body (60) being greater than the gap between the two stop bodies (62) and - The locking body (60) in the longitudinal direction parallel to each other has two longitudinal through threads (64) in the outer region of the gap, the screws (65) screwed therein being supported on the counter body (61) of the beam plate (10) of the beam part (5). Connecting parts according to one of the preceding claims,
characterized in that - The wall part (4) has at least one vertical support (20), on its lower base plate (18) via at least one hole (19) fastening with the underlying formwork (12) is possible, and - The support (20) is arranged in the rear region of the wall part (4) and is adjustable in height, and a height-adjustable support is arranged in the front region of the wall part (4). Connecting parts according to one of the preceding claims,
characterized in that
two tie rods (14) are firmly connected to each other in the rear area and to the threaded bolts (26) in the front area, and do not penetrate a plate (22) of the wall part, the plate (22) being dimensioned less stable and with the threaded bolts ( 26) is connected. Connecting parts according to one of the preceding claims,
characterized in that
the ends of the threaded rods (46) projecting beyond the rear transverse part (51) are bent obliquely downwards. Connecting parts according to one of the preceding claims,
characterized in that
the wall part (2) has tie rods (14) which are firmly connected to one another in the rear region and are braced towards the lower region of the plate (22) via at least one oblique stabilizing strut (21). Connecting part according to one of the preceding claims - a receiving box (24) for the insert end (7) of the supporting beam (2) which is only open towards the supporting beam, - at least one threaded rod (46), which extends from the inside of the receiving box (24) through its rear wall into the in-situ concrete as a tie rod (46), - a bar part (5) which can be screwed to the threaded rod (46), characterized in that - With the vertical rear wall (27) of the receiving box (24), the threaded rod (46) runs horizontally through the rear wall (27) in the upper third and is firmly connected to it, - The threaded rod (46) is bent in the area behind the receiving box (24) without kink with the largest possible radius, so that its rear end is approximately at the center of the receiving box (24), and - With the top of the support beam (2) connected to the beam plate (11) of the beam part (5) has a tension sleeve (35), the inner diameter of which is larger than the diameter of the threaded rod (46) and the axis of symmetry with the longitudinal center axis of the The beam plate (11) is aligned, the outer sides of the beam plate (11) and the tension sleeve (35) being connected to one another via external cross members (36). Connecting part according to one of the preceding claims,
characterized in that - The rear end (47) of the threaded rod (46) is connected to a cross plate (51) via locking nuts (29, 37), - The rear end (27) of the threaded rod (46) in the lower half, but not lower than a third of the height of the receiving box (24) above its lower edge, ends and - The cross plate (51) is connected to a height-adjustable support (20). Connecting part according to one of the preceding claims,
characterized in that
the tension sleeve (35) of the beam part (5) has such an inner diameter that an angular deviation of up to 15 ° with respect to the threaded rod (46) passing through it is possible. Connecting part according to one of the preceding claims,
characterized in that
the beam plate (11) has vertical openings for screwing to the support beam (2) and nail plates (43) are placed between the support beam (2) and the beam plate (11), through which the wood screws (38) extend. Connecting part according to one of the preceding claims,
characterized in that
the bending radius of the threaded rod is about one meter.

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