DE4237912C2 - Plate-shaped building construction element pressed from plastic - Google Patents

Description

The invention relates to a pressed plastic plate-shaped building construction element, with two its Top and bottom forming, to the plates flat parallel surfaces.

Panel-shaped building elements are very un Suitable for different applications, such as B. as Elements for covering walls, for creating Partitions or for separating boxes in stables, where both with high mechanical loads as well as with aggressive environmental influences, but also as load-bearing elements on shelves or in the form of pallets.

For various applications, the use of plate-shaped elements made of plastic strive worth, but so far because of material-related properties has not been solved practically.

For example, to delineate pig pens or calf boxes in stables usually between with vertical grooves or pillars provided with vertical grooves len horizontally running wall elements in the form of long stretched rectangles inserted, the height of the separator wall by the number of walls arranged one above the other elements is determined. The moist and aggressive atmosphere to considerable difficulties. Out Existing wall elements decay over time. Of the Attempt to use wooden wall elements made of stainless steel replacing is not just a matter of high costs  tert, rather it has been shown that because of the high Thermal conductivity stainless steel very uncomfortable for the animals is that when in contact with this material because of to feel the cold.

The use of plastic sheets has grown from the mate tried and tested resistance, but causes the Ela sticity of the material problems because the plates when Avoid impact from animals far. Hard PVC is indeed sufficiently stiff, but not unbreakable and can therefore also not be used. Read from it Hard PVC is difficult to dispose of and should also run out not be used for this reason. Other plastic you have plates made of relatively elastic material Edged metal edge profiles to make them sufficient to make stiff while also engaging the edge Profiles of wall elements arranged one above the other are provided was to stabilize the partition.

This construction has also not proven itself because the exposed profiles, unless they are made of stainless steel and were very expensive because of the aggressive atmosphere were attacked. They have also moved into the horizon Valley joints bacteria and other pests nested, which could hardly be removed even with thorough cleaning ren.

The high elasticity, the risk of breakage, the lack of one cost-effective on the one hand and possible on the other hand corrosion-resistant stiffening or reinforcement of the support ability and the demand for an environmentally friendly Disposing of discarded elements also poses problems when using plate-shaped plastic elements such. B. as Shelves or pallets.

It is therefore the object of the invention to be plate-shaped Plastic elements of the type mentioned above  to design that they are as stiff and stable as possible are expected to have a long service life and therefore as break-proof as possible and free from corrosion-prone Ingredients are that they are inexpensive in large Numbers made, easily and effectively cleaned disposed of in an environmentally friendly manner and as versatile as possible can be applied.

This object is achieved according to the invention element described in the introduction that each of the upper flat the outside of the plate-shaped base in each case is one of two basic bodies, the bases of which are spaced apart are arranged from each other that the space between between the bases of the basic bodies by pairs of each parallel to each other, including a groove between them eating bars is bridged that at both ends of a each pair of strips, the groove by one and both Base connecting cross bar closed to a chamber becomes, and that the two basic bodies in Area of strips and crossbars airtight with each other are connected.

Such an element can according to an advantageous Ausge Design inexpensively from plasticized plastic fall, especially unsorted household plastic case, be made. This material is on, too due to its polyethylene content, particularly resistance capable, tough, inelastic and unbreakable, and can for example how wood is fastened by nails.

The element has a simple, easy to clean Surface and has because of the internal structure high rigidity and load capacity, depending on the given requirements still further improved can be that of the element in the invention trained Kam, sealed airtight to the outside  Depending on the expected load, one or more or all with a reinforcement insert can be before the two main bodies together, preferably by vibration or mirror welding, get connected. Because the reinforcement inserts in the Chambers are enclosed airtight and also when Welding process reduces the moisture in the chambers there is no reinforcement insert made of metal Risk of corrosion, so that inexpensive alloys ver can be applied.

From DE 85 25 506 U1 is a double wall plate element known to have two its top and bottom has forming parallel surfaces. Between these Surfaces extend parallel to each other, web like strips, the two, the top and the Underside plate-shaped elements into one one-piece, parallel channels between the web-like Slat-like, plate-shaped base body the. This basic body is along its circumference by separate profiles, such as U-shaped profiles, edged, which are attached to the sides of the base body can. Corner brackets are used as corner connectors, which one Corner area between adjacent to each other at right angles Profiles filling the body and two attached to it closing, perpendicular to each other Have legs that in the U-shaped profiles can grip and can be locked with these to the Close the double-wall sheet. This con Structure is with the construction of the invention element neither in terms of its structural features, still in terms of its uses and advantages parts comparable. In particular, there is the double bridge does not consist of two basic bodies, the bases of which are in one Are spaced from each other and in the area the strips are tightly connected, so that also no closed chambers can be formed. Ins  the known construction is not particularly suitable for Production in the pressing process. The basic body that known ten double-wall sheets is rather a thin-walled highly transparent plastic part for the professional is recognizable in the extrusion process and in Horticulture for the construction of greenhouses or for ab cover for cold frames should be used.

The length of the reinforcing insert is preferably less than Taking thermal changes in length into account the wall element on the one hand and the reinforcing insert on the other hand dimensioned so that even at the maximum to he waiting limit temperatures no disturbing effects are to be feared.

For the corrosion protection of the reinforcement inserts only the crossbars at the ends of each pair of strips required. For additional stabilization of the plat ten-shaped element and to create a possible simple surface that is not very susceptible to contamination che, however, it is an advantageous embodiment that the space between the bases along the perimeter of the plat ten-shaped element by at least one of the reason body on its side facing away from the outside molded edge strips is closed.

It is used for easy manufacturing if according to a purpose moderate embodiment the strips, crossbars and against also sidebars opposite the base of a reason body have the same height. Are preferably on the two basic bodies of the element are congruent with each other assigned strips, crossbars and edge if necessary moldings molded, the height of the strips, crossbars and optionally edge strips of the one base body approximately the distance between the bases of the two the element corresponds to the basic body, while the height of the Moldings, crossbars and, if necessary, edge strips of the  other body to be at the height of welding approaches is limited, so before connecting the two reason body the reinforcing inserts completely into the two grooves formed between the pairs of strips can be.

Another expedient embodiment exists for ver simplification of manufacturing in that in a group of Pairs of strips parallel to each other all strips together others are arranged in parallel. The element also two groups of pairs of Lei parallel to each other most include the direction of the ledges of one Group the direction of the strips of the other group cuts, being in the cutting area of each last pair of one group with a pair of strips of the other Group the strips are interrupted so that the of all the pairs of ledges included in each other Connect.

In this case, it is preferable for high load-bearing electrons elements a grid - like, rigid reinforcement insert in the interconnected grooves inserted.

Run according to a further advantageous embodiment at least the ledges of a group parallel to an edge of the element. This serves among other things the cheap Power transmission when rectangular elements on two one supported on opposite sides or z. B. at vertically arranged stall partitions in vertical rails are introduced.

Due to the relatively high load-bearing capacity of the elements they look good as inexpensive and durable pallets. For this purpose, there is a particularly advantageous design of the element in that at least its edge adjacent, to the corners of a polygon forming Posi ions, feet protruding outwards over a surface  are arranged.

The feet are expediently on the one adjacent to them Molded base.

The feet are preferably designed as hollow bodies and in an area kept free by the pairs of strips ordered, with their cross-section towards them free end steadily tapered and the off the feet turned surface of the element facing each of the feet lying through a suitable for inserting a foot has refraction, which is enclosed by the feet open cavity in the direction of this opening and the area between the opening and the base body with a foot on both bases airtight wall is enclosed, whose inner wall surface aligned with the inner wall surface of the Foot passes.

The element preferably has a rectangular base tore open and the feet are at least on its four corners distributed, according to another expedient design the free ends of the feet and on the distance skids matched to each other with two feet Connecting elements are provided such that the Ele ment below the feet with two parallel to each other Skids is predictable.

Another application is when a further embodiment at least that of the side of the ledge pairs facing away from the grooves Cavities are filled by a filler that is a thermal insulating material or a sound absorbent of the material can be. In the latter case, it improves the sound absorbing properties when the the filling cavities containing material through openings in the bases of the base bodies are open to the outside  and / or if the surface of the base body with sound breaking profiling is provided.

So much for the chambers formed between the pairs of grooves not used by reinforcement inserts , these chambers can also be filled with filling material will.

There is a particularly advantageous embodiment rin that the cavities with a plastic filler are poured out or foamed. In particular melted waste polystyrene in a cost-effective manner be used. By pouring or foaming the chambers become gap-free with the insulating material stuffed what with blanks even with precise Cutting can not be achieved.

When foaming z. B. a foamable material before welding the two base bodies into the filling cavity introduced on a base body who the foam setting is delayed, so that the other main body to close the Cavity are welded to the first base body can, whereupon the foam formation within the closed cavity takes place and a special shape for the production of filling pieces as well as that Attachment of filling openings to all to be filled, from separate cavities.

Elements according to the invention are particularly suitable in their thermally insulating embodiment for the manufacture development of building walls in connection with a frame con structure from z. B. profile bars. For such an application It is particularly advantageous if the element has a has rectangular plan and two to each other parallel edges with in the longitudinal direction of these edges extending grooves is provided. The elements can  then be inserted into the frame construction in such a way that they enclose the profile bars and ver cold bridges be avoided.

Around adjacent elements like panels to connect, there is another preferred Aus design in that each element is rectangular Has a floor plan and two mutually parallel channels with longitudinally extending edges assigned to each other for mutual intervention, complete mental profiles.

The production is particularly simplified, that according to an advantageous embodiment on one of the the bases of both bases to both parallel edges Formation of a groove-shaped profile over the edge line should survive outside and that on the other of the two parallel edges ver the base of the with welding approaches seen basic body flush with the outer surface of the edge ledge ends on the other body, on which the Inside of the base adjoining section of the edge last with one for engaging in the groove-shaped profile tion of an adjacent element suitable projection is provided.

The elements of the invention can also be used to manufacture particularly simple and inexpensive roof con structures are used. For that purpose it is Element designed such that its top with in broken rows arranged to an edge of the Elements parallel, rib-like, each after the the same side facing stop shoulders that Element crossing projections is provided. This Projections take over the function of roof battens, so that on the thermally insulating, in the sloping roof horizontally extending projections on a load-bearing Frame construction attached elements roof panels  Licher design can be placed overlapping each other nen, with the breaks in the ranks of the front jump air circulation especially in the direction of Allow sloping roof.

The pairs of strips preferably cross the element Completely.

Based on the following description of the in the drawing tion illustrated embodiments of the invention this will be explained in more detail.

It shows:

Fig. 1 shows a cross section through a first form of execution of a plate-shaped element according to the invention along the line II in Fig. 2,

Fig. 2 shows a section along the line II-II in Fig. 1, wherein the right and left sides of two different arrangement of the pairs of strips show

Fig port palette. 3 is a section along the line II-II in Fig. 1 in a third embodiment as Trans,

Fig. 4 is a section similar to Fig. 1 by the Eckbe rich as a transport pallet element on a larger scale and

Fig. 5 is a partial section similar to FIG. 1 by serving as a Dachisolierelement embodiment.

The element shown in Figs. 1 and 2, a total of recorded with 10 be essentially consists of two in the pressing method of plasticized household Kunststoffab event generated base bodies 12 and 14, which are permanent, preferably by butt welding, to each other the verbun.

The base body 12 consists of a rectangular, plat-shaped base 15 , one side 16 of which forms an outside of the element 10 . On the side 18 facing away from the side 16 of the base 15 , an edge strip 20 extends at right angles to the plane of the plate along the circumference of the plate. Between two opposite sections of the edge strip 20 run mutually in pairs to parallel strips 22 and 24 , each including a groove 26 between them. In the example shown in the left half of FIG. 2, all of the bars 22 and 24 run parallel to two parallel side edges of the base 15 . In this case, according to the width of the grooves 26 adjacent to the strips 22 and 24 par allel edge strips 20 adjacent strips 24 and 22 can also be arranged directly in the edge region of the base 15 nu th 26 . This possibility also exists if, after the ge shown in the right half of FIG. 2 variant of the first group of strips 22 and 24, a second group of strips 22 'and 24 ' is added, which is perpendicular to the strips 22 and 24 of the he most group get lost. In this case, the strips 22 and 24 or 22 'and 24 ' are each interrupted in the intersection of the two strip groups such that the grooves 26 and 26 'are connected to each other.

Instead of parallel to the edges of the base 15 , the Lei most 22 and 24 or 22 'and 24 ' also obliquely to the Kan ten- and optionally also at an acute angle to each other, so that the grooves 26 and 26 'a rough Form ten-shaped pattern.

Where the grooves 26 and 26 'meet the marginal ridges 20 , the groove 26 and 26 ' each cross-section from the marginal ridges 20 forms a web 28 which closes each groove 26 and 26 '.

The base body 14 consists of a likewise rectangular, plate-shaped base 17 , with an outer surface of the element 10 forming side 16a and one of the side 18 of the base 15 facing side 18a, which is congruent to the side 18, ie with the edge strips 20 and the strips 22 and 24 or 22 '' and 24 '' corresponding profiles 20 a, 22 a, 24 a, 22 'a and 24 ' is provided, the height of which, however, is relatively low because of its function as a welding approach, while the height of the Edge strips 20 and the strips 22 , 24 , 22 'and 24 ' almost corresponds to the distance between the opposing sides 18 and 18a in the finished element 10 .

Before the two base bodies 12 and 14 are connected to each other to form the element 10 , the reinforcement of the element 10, depending on the desired stability and load-bearing capacity, can be inserted into one or more or all of the grooves 26 and / or 26 'metallic reinforcement inserts 30 . If there are two groups of grooves 26 and 26 ', a reinforcing insert can also be introduced into the overall system of the grooves 26 and 26 ' adapted to the grid-like construction.

By carefully welding the base body 12 and 14 , the grooves should be closed to form airtight chambers, in which the reinforcement layers 30 were protected against corrosion.

If the application requires, the outside of the grooves 26 and 25 'located cavities in the element 10 and - insofar as the grooves 26 and 26 ' are not used for receiving reinforcing inserts 30 - the grooves 26 and 261 be filled with a filling material 36 , which can be sound-absorbing or thermally insulating. It is particularly inexpensive. B. to fill these cavities in the base body 12 with waste polystyrene converted into a flowable state. But you can also, for example, introduce a foam-forming material with delayed foam formation shortly before welding the two base bodies 12 and 14 into the cavities to be filled, so that after welding a complete filling with foam material is sufficient without special shapes or filling openings that cause costs are required.

If the elements 10 are filled with sound-absorbing material, it may be advantageous to open the cavities located outside the grooves 26 and 26 'through openings in the bases 15 and / or 17 to the outside in order to prevent the penetration of the sound waves into the To allow insulating area. In addition, the sides 16 and / or 16a forming the outer surfaces can be provided with sound-absorbing profiles.

In order to be able to connect the elements 10 in a panel-like manner, two mutually parallel sides are provided with the mutually associated profiles 32 and 34 , the profile 32 being designed as a groove and the profile 34 being a tongue.

In particular, thermally insulating elements 10 can also be used as facade cladding or as structural elements for building walls, it being advantageous that the pressed waste plastic can be clad with wallpaper, even fire-retardant wallpaper, with good adhesion. So that the elements 10 can avoid bridges between a supporting structure forming Pro filstäb be used, it is useful if each groove-shaped profiles 32 are provided on mutually parallel side edges of the element 10 , so that the profile bar from both sides of neighbors Elements can be encompassed.

In the manufacture of an element 10 which has an edge profile 34 serving as a spring, production is made easier if the base body 14 ends on the side having this profile 34 with the associated welding shoulder 20 a, while the base body 12 on the Outside of the edge strip 20 is provided with a projection 36 forming the spring.

Since the element according to the invention combines a relatively flat construction form with a simple surface design with a high load-bearing capacity, it is particularly suitable as a transport pallet if it is provided with feet that allow the fork of a forklift truck to reach under the element. A correspondingly equipped pallet 100 is shown in FIGS. 3 and 4.

The loading plate 110 of the pallet 100 corresponds in wesent union to the element 10 , the cavity between the lower base body 112 and the upper base body 114 being closed off from the skirt 120 , without the edge being seen with profiles in this case, so that there is a particularly simple, easy-to-clean outer surface. The strips 22 and 24 of element 10 correspond in the pallet 100, the strips 122 and 124, wherein even when the pallet 100, the arrangement of the strips corresponding to the above-described possible speeds may be varied, that is z. B. to form a group of parallel grooves 126 or to form a group of intersecting grooves. Likewise, the number of reinforcing inserts 130 introduced into the grooves 126 can be varied, and a grid-shaped reinforcing insert can be provided with a corresponding arrangement of the grooves.

In an arrangement customary for pallets, three rows of three feet 140 each are provided on the underside of the pallet 116 , these feet being integrally formed on the lower base body 112 and tapering towards their free end. The feet 140 are hollow and are formed by a truncated cone-shaped or truncated pyramid-shaped jacket 142 with an inner wall surface 144 which is closed at its free end by a bottom 146 . The jacket 142 is connected to the base 115 of the base body 112 , the ribs 122 and 124 being distributed on the base 115 in such a way that the regions on which the feet 140 are arranged are free of strips, so that in the manner described below Possibility is created to stack empty pallets in a particularly space-saving manner.

The base 115 is penetrated by the sheath 142 formed on it in the region of an opening 148 formed therein, the sheath 142 then continuing on the inside 118 of the base 115 and being determined by the height of the strips 120 , 122 and 124 Level ends. While maintaining the tip angle selected for the inner wall surface 144 of the casing 142 , this wall surface 144 thus continues in the interior of the hollow loading plate 110 . On the upper base body 114 , the base 117 is provided on its inside 118 a with a welding shoulder 142 a assigned to the free end of the jacket 142 on the base body 112 , which is designed such that it is welded after the two base bodies 112 and 114 have been welded to the inner Wall surface 144 has aligned inner wall surface 150 , which opens out in an opening 152 on the outer side 116 a of the base 117 . After the welding of the two base bodies 112 and 114 , the pallet 100 thus has at its top 116 openings formed by the openings 152 , to which a space 144 and 150 delimited cavity 154 adjoins the one for receiving the corresponding foot 140 over the pallet 100 stacked pallet of the same type is suitable. The area within the hollow loading plate 110 intended for receiving the reinforcing inserts 130 is sealed airtight relative to the cavity 154 .

In order to be able to move the pallets 100 , it is possible to arrange 140 runners 150 under the feet in a known manner. For this purpose hergestell te skids 150 are provided in the pressing process, having the feet 140 associated latching pin 152 having a convexly in longitudinal section, arched cross-sectional shape, so that by Eindrüc the runners 150 of the locking pin 152 in apertures 154 ken at the bottom 146 of each foot 140 permanently respectively can be connected with a row of three feet 140 .

A further variant is shown in FIG. 5. It is an element in which the cavities not used by reinforcement inserts are filled with an insulating material 70 and two parallel edges are provided with profiles 32 and 34 to form adjacent elements to be able to engage positively. For use as roof insulation, projections 72 are arranged on the outer side 16a of the base body 14 in interrupted rows, all of which have stop shoulders 74 pointing to the same side, which can be used as roof battens for fastening roof panels. The alternating in each row of successive projections 72 and gaps, not shown, are matched to the standard dimensions of roof tiles and distributed so that on the one hand the roof tiles can be securely fastened and on the other hand through the gaps air circulation in the area between the roof tiles and the outer side 16a of the elements can take place.

Claims (25)

1. Plastic pressed, plate-shaped construction construction element ( 10 ), with two its top ( 16 a) and its underside ( 16 ) forming parallel surfaces, characterized in that each of the surfaces the outside of the plate-shaped base ( 15 , 17 ) each one of two base bodies ( 12 , 14 ), the bases ( 15 , 17 ) of which are arranged at a distance from one another, that the space between the bases ( 15 , 17 ) of the base body ( 12 , 14 ) is parallel to each other by pairs of each other , between them a groove ( 26 ; 26 '') enclosing strips ( 22 , 24 ; 20 , 22 ; 20 , 24 ) is bridged that at both ends of each pair of strips, the groove ( 26 ) each because of one of two bases ( 15 , 17 ) connecting transverse web ( 28 ) is closed to form a chamber, and that the two base bodies ( 12 , 14 ) in the area of the strips ( 20 , 22 , 24 ) and transverse webs ( 28 ) are connected to one another in an airtight manner. 2. Element according to claim 1, characterized in that at least in a groove ( 26 ) a rigid reinforcing insert ( 30 ) is inserted. 3. Element according to one of claims 1 or 2, characterized in that the space between the bases ( 15 , 17 ) along the circumference of the plate-shaped element ( 10 ) by at least one of the base body ( 12 ) on the outside ( 16 ) facing side (18) molded edge strips ( 20 ) is closed. 4. Element according to one of claims 1 to 3, characterized in that the strips ( 22 , 24 ), transverse webs ( 28 ) and optionally edge strips ( 20 ) relative to the 35 base ( 15 ) of a base body ( 12 ) at the same height point. 5. Element according to one of claims 1 to 4, characterized in that on both base bodies ( 12 , 14 ) of the element ( 10 ) coincidently assigned strips ( 22 , 22 ', 24 , 24 '), transverse webs ( 28 , 28th ') And optionally edge strips ( 20 , 20 ') are integrally formed, the height of the strips ( 22 , 24 ), transverse webs ( 28 ) and possibly edge strips ( 20 ) of a base body ( 12 ) approximately the distance between the two bases ( 15 , 17 ) of the element ( 10 ) forming the base body ( 12 , 14 ) corresponds, while the height of the strips ( 22 ', 24 '), crossbars ( 28 ') and optionally edge strips ( 20 ') of the other base body ( 14 ) is limited to the amount of weld deposits. 6. Element according to one of claims 1 to 5, characterized in that in a group of pairs ( 22 , 24 ; 22 a, 24 a; 22 ', 24 ') mutually parallel strips, all strips are arranged parallel to each other. 7. Element according to claim 6, characterized in that it comprises two groups ( 22 , 24 ; 22 ', 24 ') of pairs of mutually parallel strips, the direction of the strips of the one group ( 22 , 24 ) the direction of the strips the other group ( 22 ', 24 ') intersects, and that in the intersection of each pair of strips of one group with a pair of strips of the other group, the strips are interrupted in such a way that the grooves ( 26 ; 26 ') enclosed by all strips are mutually exclusive stay in contact. 8. Element according to claim 7, characterized in that a lattice-like, rigid reinforcing insert ( 30 ') in the grooves ( 26 , 26 ') is inserted. 9. Element according to any one of claims 6 to 8, characterized in that at least the strips ( 22 , 24 ; 22 ', 24 ') of a group run parallel to an edge of the element ( 10 ). 10. Element ( 100 ) according to any one of the preceding claims, characterized in that at least its edge adjacent, at the corners of a polygon forming positions, are arranged on a surface ( 116 ) to the outside in front of standing feet ( 140 ). 11. Element ( 100 ) according to claim 10, characterized in that the feet ( 140 ) on the adjacent th base body ( 112 ) are integrally formed. 12. Element ( 100 ) according to claim 11, characterized in that the feet ( 140 ) are formed as a hollow body and are arranged in a region of the strip pairs ( 122 , 124 ) that is kept free, that their cross-section is towards their free end Constantly tapered that the surface facing away from the feet ( 116 a) of the element ( 100 ) opposite each of the feet ( 140 ) opposite an opening ( 152 ) suitable for inserting a foot has that that of the feet ( 140 ) is enclosed Cavity ( 154 ) in the direction of this opening ( 152 ) opens and that the area between the opening ( 152 ) and the base ( 140 ) supporting the base body ( 112 ) with an airtightly adjoining wall to both bases ( 115 , 117 ) whose inner wall surface ( 150 ) merges into the inner wall surface of the foot ( 144 ). 13. Element ( 100 ) according to any one of claims 10 to 12, characterized in that the element has a rectangular shape and the feet ( 140 ) are distributed at least on its four corners. 14. Element according to claim 13, characterized in that the free ends ( 146 ) of the feet ( 140 ) and on the distance of two feet matched runners ( 160 ) are provided with an associated connecting elements ( 162 , 164 ) such that the Element ( 100 ) below the feet ( 140 ) can be provided with at least two parallel runners ( 160 ). 15. Element according to one of claims 1 to 9, characterized in that at least on the side facing away from the grooves ( 26 , 26 ', 26 a) of the pairs of strips ( 22 , 24 ; 22 a, 24 a; 22 ', 24 ') located cavities of egg nem filler ( 36 ) are filled. 16. Element according to claim 15, characterized in that the filling material ( 36 ) is a thermally insulating material. 17. Element according to claim 15, characterized in that the filling material ( 36 ) is a sound-absorbing material. 18. Element according to any one of claims 15 to 17, there characterized in that the cavities with an art fabric filling material is poured out or foamed. 19. Element according to claim 17, characterized net that the voids containing the filler over Openings in the bases of the base body to the outside are open. 20. Element according to one of claims 17 or 18, characterized in that the surface of the basic body is provided with sound-breaking profiles. 21. Element according to any one of claims 1 to 9 or 15 to 20, characterized in that it has a rectangular plan and on two mutually parallel edges with in the longitudinal direction of these edges Nu ten ( 32 ) is provided. 22. Element according to one of claims 1 to 9 or 15 to 21, characterized in that it has a rectangular shape and on two mutually parallel edges with in the longitudinal direction of these edges, the mutually associated mutually complementary profiles ( 32nd , 34 ) is provided. 23. Element according to claims 5 and 22, characterized in that on one of the two parallel, with complementary profiles ( 32 , 34 ) provided edges, the bases ( 15 , 17 ) of both base bodies ( 112 , 114 ) for forming a groove-shaped profile ( 32 ) over the edge bar ( 20 ) protrude outwards and that at the other of the two parallel edges, the base ( 17 ) of the approaches with welding ( 20 a, 22 a, 24 a) provided base body ( 14 ) flush with the outer surface of the Edge strip ( 20 ) on the other base body ( 12 ) ends, which on the inside ( 18 ) of its base ( 15 ) adjoining section of the edge strip with a suitable for engaging in the groove-shaped profile ( 32 ) of an adjacent element ( 10 ) before jump ( 34 ) is provided. 24. Element according to claim 16 and one of claims 21 to 23, characterized in that its upper side ( 16 a) arranged in interrupted rows, to an edge of the element ( 10 ) parallel, rib-like, shoulders facing each on the same side ( 74 ) forming projections ( 72 ) crossing the element. 25. Element according to any one of the preceding claims, characterized in that the pairs of strips ( 2 , 24 ; 22 a, 24 'a; 22 ', 24 ') completely cross the element ( 10 ).