GB2104121A

GB2104121A - Latticework of beams

Info

Publication number: GB2104121A
Application number: GB08125173A
Authority: GB
Inventors: Lajos Seigriszt
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-08-18
Filing date: 1981-08-18
Publication date: 1983-03-02

Abstract

The invention relates to a latticework comprising prefabricated beams I & II, which can be supported both at single points and along lines, and can be used as a structure bearing up against a plane or on a slightly arched surface. The latticework contains two beam-groups arranged perpendicularly to each other. These are interconnected e.g. by means of elastic arbors III & IV, preferably made of stainless steel in such a manner, that within the latticework the ends of the beams - expediently of the same length - are connected to the middle of the side faces of the beams lying perpendicularly thereon, and vice versa. On the rim of the latticework shorter beams I are also used, which may be provided either with a through-hole lying perpendicularly to the longitudinal axis, or with a blind hole running parallel with the longitudinal axis and may be interconnected by means of the steel arbors having been arranged therein. The holes in the beams may be lined with an elastic material. <IMAGE>

Description

SPECIFICATION Latticework consisting of prefabricated beams The invention relates to a latticework being essentially planar and consisting of prefabricated beams, which can be supported at single points and also along lines and which can be used as a structure bearing up against a plane or a moderately arched surface. Its main field of application is the civil, architectural and hydraulic engineering.

There are and there have been different experiments and solutions directed to structures bearing up against the plane, however, when these were assembled into a latticework, the components have been interconnected one after the other by element-ends and one was always confronted with the problem of points of junction.

All these latticeworks may be characterized by the subsequent formation of square-net connections and the points of junction.

A beam-latticework having been developed in the Soviet-Union represents a well known solution and it is used in masses. With this solution the components are formed by prefabricated reinforced concrete beams, being interconnected by the beam-ends, while the points of junction formed are subsequently mounted and casted with concrete. The latticework is suitable and complies with requirements, however, it is not resistant to the plus-load resulting from the eventually formed arch of the bearing surface and loading the latticework. According to experiences the structure gets sheared at the points of junction, as a consequence the latticework gets disassembled and damaged. As the points of junction are cast out with concrete, the structure may not be considered as elastic, representing a primary requirement at bank protection. [Mark6, Earthwork. Protection.Technical library. pp.

1 9-1 20, figure 3.66. Beam-latticework in Kisköre].

In order to be able to ensure the elasticity of the latticework, the so-called latticework "KMZ" has been developed. With this solution the prefabricated beams are interconnected by means of a spiral, which is led through the steel hooks protruding from the beam ends. Every single spiral is interconnecting four element-ends each having been laid in a square net arrangement forming regular interstitial spaces. The latticework was prepared for a slime separator and met completely the requirements. Due to the formation of connections it cannot be considered as a structure, since this kind of connection due to its formation is unable to take up or to distribute the loads resulting from the exerted bar stresses.

The latticework-since the hook-coupling becomes "unstretched" at the spiral-is well following the unevenness of the bearing plane and adapts itself to the area of bearing.

According to our knowledge, beside the two lattice-works previously mentioned further bank protection lattices consisting of reinforced concrete beams have not been built.

The other carpet coatings, whether they are made of smallsized, mediocre or large elements, whether they are permeable to water or not, are fulfilling but one single function, namely the surfacial protection. Said structures are well suitable for these purposes, however, they cannot be considered as multipurpose base structures, after all they have not been made for this purpose [Mark6, Earthwork. Protection. Technical Library.

1975. pages 112-115; and 116--120].

Concrete plates with grooves serving as the components of bank covers have been also produced. After having been laid these types require neither an after treatment, nor filling the abutting joints. With certain solutions the elements are stringed onto a steel wire and are interconnected in such a manner. Owing to the character of the mode of connection, this arrangement is utmost flexible and is well following the unevenness of the area of bearing.

However, this latticeworks cannot be considered as base structures either and they are fulfilling but one single function.

According to technical literature and practice no base structure has been prepared up to now, which would take the advantages of prefabrication into consideration in course of the formation of the end product, which would be almost universal and by means of which typifying and standardization-representing one of the fundamental prerequisite and requirement of mass production-could be realized.

The aim of the invention is partly to eliminate the drawbacks previously described, partly to develop a structure, which can be extensively used either as a base structure, either as a significant and essential component having been completed with an auxiliary structure, which is carrying and distributing the affecting loads with a high-grade safety and durability.

Essentially, the requirements relating to said structures may be summarized, as follows:- it could be dimensioned so, that it should be able to carry the affecting loads with a high operational safety; the dimensions of the components should ensure, that assembly of the latticework could be performed without wearisome manual work and continuously, even under adverse building conditions; complete or at least partial prefabrication and pre-assembly should be possible, the formation of points of junction at the connection of the elements to be subsequently treated could be avoided; the formation and development of the structure should be unambiguous and simple and assembly of the latticework should not require the intervention of high-qualified skilled workers;; building-in should be safe and should comply with labour health and accident prevention regulations; it should be aesthetic; when to be built-in in the natural environment, it should slightly disturb the general effect of nature.

Last but not least it should be economical.

Building costs should not surpass the building costs relating to the unit of establishments, latticeworks of similar destination.

The demand for the latticework according to the invention [and the structures and establishments of architectural, civil and hydraulic engineering to be built therewith] is based on the recognition, that a universal structure is to be developed which is simplifying by its multipurpose adaptability and applicability the construction of the presently used diverse, accordingly hardly standardizable structures, thus ensuring and promoting the performance of a lot of work in a well organizable and economical manner, utilizing all the advantages of the complete prefabrication and pre-assembly and the relative low weight of the constituents.

Accordingly, the invention relates to a dimensionable planar latticework comprising prefabricated constituents, with which the connecting-coupling system developed excludes the formation of the points of junction to be subsequently treated. After having assembled, the latticework does not require any afterwork, as e.g.

formation of points of junction and casting with concrete.

The latticework can be built-in as a general latticework since it can be well supported at single points and along line(s), but it can be well applied as a structure bearing up against a plane.

The latticework can be applied in several fields of civil, architectural and hydraulic engineering as a base structure.

The connection between the elements is formed as a concealed, elastically bedded coupling lending a high-grade elasticity to the latticework.

The components of the latticework sloping at a right angle to each other are laid in such a manner, that the ends of the elements are always connected to the middle-part of the adjacent element. The latticework is essentially formed of "H" shaped element groups, which are displaced by half a length in relation to each other. The position and place of the structural bores on the elements are unambiguously defining the place and position of the connecting elements, accordingly, assembly of the latticework does not require preliminary training, anyone can learn it in some minutes. The interstitial spaces are always square or oblong-shaped. The elastic connection between the structural elements is ensured by elastic bushing, advantageously made of a synthetic material, through which a connecting arbor made of stainless steel is led across.In such a manner the latticework consists of element groups containing three constituents each, each having been arranged on the endfaces and the sidefaces, respectively. Taking into consideration, that the element groups are appearing in a "H"shape and the number of connections amounts to four for the single elements, said connectingcoupling system is called "quaternary Hconnection".

The latticework as a base structure can be applied in several fields of civil, architectural and hydraulic engineering, either as an independent structure or having been completed with auxiliary structures in accordance with prevailing claims and demands.

The iatticework according to the invention may be built-in as a structure bearing up against a horizontal, nearly horizontal or other skew plane, where the surface of the formed earthwork is to be protected, where the task lies in to ensure the constancy of profile or to protect the bank. In such a sense it can be well applied in hydraulic and civil engineering, as profile-ensuring, loading or even sludge-separating means for natural or artificial streams, channels, as well as a structure for supporting the concrete elements and concrete stones forming the waterproof cover. It is well suitable for the protection of incisions and bank surfaces of dikes, for ensuring the profiles and to prevent the slipping of earthwork.Owing to its structural formation, the latticework can be expediently used on the riverbed-side, on the bank, for the reduction of the erosive effect of the arising undulation, and for the protection against thereof. The latticework is further on well suitable for the protection and profile insurance of the circular embankments of reservoirs and ponds, and barrages as well.

The latticework according to the invention as a base structure can be well utilized for trafficzones, loading and parking areas and raceways.

By its application a lot of in-situ concreting work and the aftertreatment thereof becomes superfluous, accordingly, seasonal character of said activity can be utmost reduced, so much the more, as the latticework can be completely prefabricated and pre-assembled and thus it is insensitive to the inclemencies of weather. With these constructional methods the latticework functions as the base structure of the superstructure and carries and distributes the superimposed loads to the underground and the area of bearing.

When supported by main girders made of reinforced concrete or steel structures, the latticework may be well used in architectural engineering too, in particular for the roofing of magazines and industrial buildings. In this case, the possibility of complete prefabrication, the relatively small weight and high loading capacity may be well utilized. In addition to these, it can be well used in certain fields of internal architecture as a decorative latticework, a pseudo-ceiling or an internal decorative ceiling. As a coffered ceiling it offers a really aesthetic appearance.

Summing up what has been said, the latticework according to the invention comprising prefabricated elements can be characterized in that it consists of two beam-groups with beams of rectangular cross-section, lying perpendicularly to each other, and within each group of beams there is a smaller group containing longer and shorter beams as well, but being of identical length and width, furtheron, the beams of the two beam-groups are fixed to one another in a perpendicular position in such a manner, that the two ends of every single longer beam of the latticework are connected to the middle of the side surface of the longer beam lying perpendicularly thereon or to one end of the shorter beam lying also perpendicularly, while the other end is connected to the middle of a longer beam or to the end of a shorter beam.

It is to be considered as advantageous, but it is not obligatory, that the longer and shorter beams of the two beam groups should be of the same type. If the lengths of the corresponding beams of the two groups are different, the interstitial spaces are taking up an oblong shape. The beams are interconnected by means of elastic couplings formed by elastically lined bores of the beams and elastic arbors, expediently made of stainless steel, having been arranged therein.

The lining of the bores may be formed of a resilient synthetic bush or the bores may be lined with an adhesive made of a synthetic resin.

On the endfaces of the beams, along the axis thereof, there are blind holes, while on the sidefaces lying perpendicularly to the longitudinal axis of the beam, through holes have been processed for receiving the arbors.

In case of necessity, in the single through-holes having been processed in the beams, supporting arbors may be fixed bearing up against the plates covering the free interstitial spaces between the beams.

In particular, when transporting prefabricated latticeworks to the building-site, in order to be able to prevent dislocation of the beams during the transport, on the rim of the beams, in the accessible blind-holes studs are fixed, which are penetrating the through-holes of the beams fitted to the blind-holes and on the ends thereof there are nuts for preventing the dislocation of the prefabricated latticework.

The invention will be detailed by the aid of the accompanying drawings, by means of the description on the embodiment of the components and some examples for the application, wherein: Figures 1 to 5 are showing the formation of the corner- and end-piece of the shorter beam of the latticework according to the invention, Figures 6 to 10 are illustrating the so-called general element on the longer beam, Figure 11 is showing the top view of the detail of the latticework according to the invention for explaining the assembly of the latticework, Figure 1 2 is showing a section along the line b-b of the Figure 11, Figures 1 3 and 14 are schematically showing the shorter and longer arbor, respectively, Figure 1 5 is showing the finished latticework, Figures 1 6 and 1 7 are showing the sectional view and the top view, respectively of a latticework, where the interstitial spaces are covered by concrete plates, Figures 1 8 and 1 9 are showing the protection of an artifical stream, having been illustrated as a cross-section and a planar top-view, respectively, Figures 20 to 22 are showing the top view, the side view, and the cross-section of a profileensuring and dover supporting structure, Figures 23 and 24 are showing the top view and the section along the line e-e of Figure 23 of the formation of the top of a flood control dam having been rendered suitable for vehicle-traffic, Figures 25 to 31 are showing the latticework according to the invention and the constituents thereof, Figures 32 and 33 are showing the top view and section of the road foundation with a high loading capacity, Figure 34 is showing a prefabricated latticework having been fixed to avoid dislocation, while the Figure 35 is showing a detail of the screwed connection according to Figure 34.

Figures 1 to 5 are showing the top view, side view and perspective view of the corner- and endpiece I according to the invention and the section along the line a-a according to Figures 1 and 2. Along the frontal plate of the element I there is a bushed blind hole 2 lying perpendicularly to the frontal plate, while in the height of blind hole 2, perpendicualrly to the side faces there is a bushed through hole 1. In a plane lying higher, than the plane having been formed by the axes of the through hole 1 and the blind hole 2, respectively, a further bushed through hole 3 may be processed lying perpendicularly to the sidefaces, which is carrying the auxiliary structure; this is to be formed, when the interstitial spaces are filled with prefabricated concrete pavement plates or concrete stone.In case of necessity, said hole 3 may receive the carrying arbor. The corner- and endpiece I is preferably made of reinforced concrete, in a given case of cement concrete, a synthetic material etc.

in compliance with prevailing requirements.

Figures 6 to 10 are showing the general element II according to the invention (side view, top view, frontal view, perspective view, in an enlarged scale, in a partial sectional view running parallel with the side view). With this solution, in the height corresponding to Figures 1 to 5, the bushed blind holes 2 are processed, furtheron, on the side face in the middle thereof and lying perpendicularly, in the height of the blind hole 2 there is the bushed through hole 1. Also in this case the bore 3 is carrying and fixing the auxiliary structure and in case of necessity it is formed as a through hole.

The corner- and endpieces I and the general elements II are dimensioned so, as to obtain complete fitting in course of assembly, as it will be described in details later.

The bushes having been arranged in the bores may be formed by synthetic pipe-pieces or may be made of a synthetic adhesive.

In Figures 11 and 12 the top view of the latticework according to the invention is shown, i.e. the latticework having been assembled along the line b-b, consisting of the corner- and endpieces I and the general elements II, by means of the longer and shorter arbors Ill and IV, respectively, made of stainless steel. The length and diameter of the arbors Ill and IV depend on the size of the elements I and the general elements II and on the dimensions of the bore, while the parameters are determined according to prevailing necessity.

In Figure 11 the "quadruple H-connection" or "H-formation" having been formed in the inside of the lattice structure and the displacement thereof in relation to the middle of the general element II have been illustrated. The assembly of the latticework begins with the formation of the corners. The beginning element I is laid, hereafter the general element II is pushed onto the arbor Ill having been arranged in the through-hole 1 by using the blind hole 2 in the frontal plate. By this activity the corner is formed. In the following phase of work we expediently prepare the guide row, the first member of which is an element I having been connected to the element I of the corner part; said element is lying perpendicularly to the former element I and can be fixed by means of an arbor IV led into the meeting blind hole 2 and the through hole 1 of the other element.The next element of the guide row-which is connected by means of a general element II and the blind hole 2 of the frontal plate to the guide row-is pushed onto the still protruding part of the arbor IV. This element is coplanar with the element I forming the corner, accordingly it is lying perpendicularly to the element I lying prior to it. The next element of the guide row is formed again by an element I, the next one is a general element II and so on. To the through hole of the general elements II of the guide row a perpendicular general element II is connected via the blind hole 2 of the front plate by means of the arbor Ill.

The general element Il having been connected to the elements I of the guide row is coupled with the guide row via its through hole 1 on the side face by means of the arbor IV. Furtheron, the intermediate members of the latticework are always the general elements II, which are interconnected sometimes by the endpiecesideface/blind hole 2-through holes 1, sometimes by the sideface, through hole 1endpiece, blind hole 2 by inserting an arbor IV.

In Figure 1 5 the finished rectangular latticework is shown, while Figure 1 6 is showing a section in an enlarged scale; Figure 1 7 is showing the top view of the interstitial spaces of the latticework having been filled with the prefabricated concrete pavement plates D, which are kept by the arbors arranged in the throughholes 3 of the general elements II.

Undermentioned some possible applications of the invention are described without aiming at completeness.

As a preliminary we wish to mention that with the structure according to the invention the latticework represents the load carrying, load distributing and load transferring static structure, while the interstitial spaces are filled always in accordance with prevailing requirements. In Figure 1 8 a base structure to be used in hydraulic engineering is shown--outstretched in the plane-while in Figure 19 the section along the line c-c of the Figure 1 8 is shown as a profile (not having been outstretched in the plane).

In this case the latticework serves for ensuring and stabilizing the profile of channels (incisions) and for loading. In this case the corner- and endpieces I and the general elements II are laid directly onto the surface of the formed earthwork, accordingly, it functions as a structure bearing up against the plane. The corner- and endpieces I and the general elements II used in this case are interconnected by means of the arbors Ill and IV, respectively. The prismatoid 4 formed at the meeting point of the bank and the horizontal plane is cast out with concrete in-situ. Prior to concreting, a steel arbor each having been bent in compliance with the angle of bend is led through the through hole 1 on the sideface of the general element II, thus ensuring the co-operation of the latticework.In case of the protection of the complete profile (the surface of the bank and the bottom plane), due to the state of equilibrium, the latticework is unable to displace.

On the right side of the symmetry axis, the latticework Z as a base structure is performing all the general functions to be performed and in addition to this it is also supporting the closed coating to be formed. With this solution the auxiliary structure consists of the prefabricated pavement plates D. The latticework and the builtin auxiliary structures are forming in their common appearance a closed coating, being essentially a carpet, which can be completely prefabricated, without the points of junction requiring subsequent treatment and casting out of the joints.In this case at the corner- and endpieces I of the latticework and the general elements 11 the bores for the arbors carrying the concrete pavement plates D are to be processed, which are leading the arbors having been expediently made of high-strength steel 4 8 mm and coated with minium.

Figure 1 9 is showing the structural solution of the open latticework N and the closed coating Z, in this case the area of bearing is formed by the profile of the object. In the meeting point of the planes the prismatoid 4 is formed, which is cast with concrete in-situ. The prefabricated pavement plates D are bearing up against the steel arbors having been led through the through hole 1 of the element of the latticework.

Figures 20 to 22 are showing the applicability of the latticework according to the invention as a fore apron and as a tailrace.

The coating of the fore apron and the tailrace of the objects being permeable to water is taking place by casting the concrete in-situ or with stonework. The latticework as a base structure can be well used in this case too. The whole profile is lined with the latticework having been connected to the front plate of the object, hereafter the covering plates are placed on the surface of the bank. The plane of the bottom, at i:he sill of the object is formed with prefabricated concrete pavement plates in such a manner, that the pavement plates D are placed onto shoe arbors IV made of reinforcing steel and having been led through the through bore i of the element I and the general elements II.We processed in the same manner after the energy annihilating floodgate, where the concrete pavement plate D is laid into the interstitial spaces, onto the area of bearing. On the inflow side of the object the fore apron may be formed in accordance with the tailrace to be seen in the Figure, with the difference, that there is no energy annihilating flood-gate. As it is to be seen, the latticework can be staged, accordingly, the coating of the bank can be formed in compliance with the watercourse.

In Figures 23 and 24 a further possible application is to be seen: the formation of a traffic-zone on the main dike. As it is well known, in general traffic is taking place on the main dikes, which is taking place to an increased extent in the periods of protection. The top of the dam can be considered as an earth road, which is-due to the character of its material-slightly resistant to the damaging effects of traffic.

The experiments having been performed up to now and directed to a cheap method, which could render the top of the dam suitable for traffic, have been unsuccessful.

By the application of the latticework according to the invention as a base structure this problem can be also solved, since a traffic-zone may be formed, which ensures the traffic for all types of vehicle, from the passenger cars to the category of heavy vehicles, independent of the wheel track thereof. Essentially, the traffic-zone consists of two zones running parallel with each other, having been fixed by general elements li against lateral displacement. The superstructure is formed by prefabricated reinforced concrete plates having been developed for this special purpose, which is bearing up against the latticework according to the invention; since they are well adapting themselves to the interstitial spaces, the elements are fixed and cannot be displaced.The area between the traffic zones is formed as a barrel road and it is enclosed by the wheels of the vehicle.

By using said system, an economical trafficzone may be formed on the surface of other earth roads, as e.g. the internal roads of dwelling settlements can be prepared. In this case the traffic-zone may be completely assembled of prefabricated elements, In Figures 25 to 31 a spatial coating with lattice is to be seen. In this case the elements V may be of smaller size (e.g. 1 or 1 5x30 cm): the interstitial spaces of the size of 1 Oi'l cm are filled with humus having been filled up to a 5 cm thick sandy gravel buffer layer and sown with a mixture of grass-seeds being well resistant to treading. By applying this method, an utmost economical and aesthetic parking area may be obtained yielding a fresh dash of colour in the built-in area and dissolving the grey monotony of the traffic roads and interconnecting roads.Also in this case the "quadruple-H connection" with an elastic coupling of the elements is used. If we want to build-in the latticework with the previously described dimensions as a base structure for a closed space-coating subjected to a high load or for floorings in plants and magazines, the interstitial spaces are expediently Filled with breaketone or screened furnace slag; onto the base structure having bsen formed in such a manner an asphalt-concrete layer or a basalt concrete layer is applied (wi.h the necessary closing layer) in compliance with the requirements.

The foundation of the spatial coating and the flooring can be completely prefabricated.

One of the possibilities for building-in the latticework according to the invention-well suitable for road construction-is shown in a sectional and top view in Figures 32 and 33.

Foundation of the roads is prepared locally. The so-called "panel transport roads" mostly used on large building areas are not of permanent character, these are provisional internal plant roads and the prefabricated concrete plates, the constituents thereof, are transported futheron and laid on the new building site with a provisional character fur the duration of construction. Up to now only auxiliary means, so e.g. railings, width indicating columns, kilometre stones etc. have been prepared. Construction of the superstructure may be well mechanized and performed with a high productivity. However, we cannot tell the same about the infrastructure, the fundament of the road, involving local casting of a large mass of concrete, a large area of concrete to be subjected to after-treatment, the repeated handling of a material mass etc.

The latticework according to the invention-as a base structure-having been dimensioned as a latticework bearing up against the plane, can be well and economically used in road construction.

The reinforced concrete plate G of the superstructure is formed by an asphalt-concrete coating applied and poured in layers, provided with a closing layer. Displacement of the plates is prevented by triangle and quadriatic shambles formed thereon; which are adapting themselves into the interstitial spaces of the latticework F.

The base latticework F is accompanied on the edges by longitudinal locally cast reinforced concrete marginal beams H. The latticework is bearing up against the buffer layer J consisting of sandy gravel, the interstitial spaces are also filled with sandy gravel. The topmost closing layer is formed of the applied and poured asphalt concrete.

By applying our method, an essential part of the road construction can be performed by means of the prefabricated elements accelerating the rate of work, mechanizing the most labour intensive part thereof and considerably reducing the seasonal character of road construction.

By using the latticework according to the invention as a base structure spatial coatings, the surface of parking areas, loading and storing areas, landing paths and taxi-ways may be formed. It goes without saying, that the latticework and the reinforced concrete plates are to be dimensioned in compliance with loading requirements.

In Figure 34 the prefabricated latticework according to the invention-having been fixed against dislocation-is to be seen, while Figure 35 is showing the corner-detail of Figure 34. Here the rag bolt Vl having been fixed in the blind hole 2 of the general element II penetrates through hole 1 of the corner- and endpiece I and on the end thereof, by inserting a washer VII, a nut Villi is screwed on. Along the periphery of the prefabricated lattice structure-as it is to be seen in Figure 34-the latticework is properly fixed against dislocation. In such a manner the prefabricated latticework can be transported without any risk.

At last, without referring to any of the drawings, we should point out, that the latticework can be expediently used as a roofing structure by using lightweight concrete, a synthetic material or wood.

When it is applied as a wood structure, the structural bores of the elements are not bushed at all, since due to its material character the wood is anyhow insuring the elastic embedding of the connecting arbor. In such a case the roof purlin is fixed in the usual manner to the reinforced concrete crowning. Compared to known wooden structures of similar dimension and shape, the main advantage lies in that the wooden beams of several meters length for preparing the rafting and main bracings become superfluous. The latticework can be prepared from waste beams of the length of 80--120 cm. Resulting from the structural character and the way of assembly, the lattice-structure is properly stiff also in the longitudinal direction, as a consequence, the usual weather-boarding may be omitted. The components may be dimensioned so, that the roofing slates could be directly nailed onto the latticework without a boarding or a densely arranged battening. When corrugated sheets are used, the size of the interstitial spaces may be increased. The structure can be well utilized for the roofs of family houses, agricultural plants and buildings.

The lattice structure as a roofing structure can be well used everywhere, where the internal appearance requires a coffered ceiling. In this case the latticework can be coated with wood or elements made of lightweight concrete or ordinary cement concrete. The lattice structure can be well used in internal architecture, either as a decorative latticework or as a partitionlatticework. In this case the components are made of noble woodmaterial by joinery.

Claims

1. Latticework containing prefabricated beams, characterized in that it consists of two beamgroups with beams of rectangular cross-section lying perpendicularly to each other and within each group of beams there is a smaller group containing longer and shorter beams, but being of identical length and width within the smaller groups furtheron the beams of the two beamgroups are fixed to one another in a perpendicular position in such a manner, that the two ends of every single longer beam of the latticework are connected to the middle of the side surface of the longer beam lying perpendicularly thereon or to one end of the shorter beam lying also perpendicularly, while the other end is connected to the middle of a larger beam or to the end of another shorter beam.

2. Latticework as claimed in claim 1, characterized in that the longer resp. shorter beams contained in the two beam-groups are of the same type.

3. Latticework as claimed in claim 1 or 2, characterized in that the beams are interconnected by means of an elastic connection.

4. Latticework as claimed in claim 3, characterized in that the elastic connection is formed by elastically bushed bores of the beams and elastic arbors arranged therein, preferably made of stainless steel.

5. Latticework as claimed in claim 4, characterized in that in the inside of the bores there is an elastic bush arranged, made of a synthetic material.

6. Latticework as claimed in claim 4, characterized in that the inside of the bores is lined with an elastic adhesive of synethtic resin base.

7. Latticework as claimed in any of the claims 1 to 6, characterized in that on the endfaces of the beams, along the axis of the beam, blind holes are processed, while on the side faces through bores are to be found running perpendicularly to the longitudinal axis of the beam.

8. Latticework as claimed in any of the claims 1 to 7, characterized in that in the single through holes having been processed in the beams supporting arbors are fixed, onto which plates covering the free surfaces among the beams are bearing up.

9. Latticework as claimed in any of the claims 1 to 8. characterized in that in particular in case of prefabricated latticeworks, on the rim thereof, in the accessible blind holes stud bolts are fixed, which are penetrating the through-holes of the beams adapting themselves to the blind bores and on the ends thereof nuts are fixed, which are preventing the displacement of the prefabricated latticework.