Abstract:
A container wall for storing and fermenting materials, comprising a clamping channel, having an undercut near the upper edge that is open for clampingly receiving a rim of at least one plastic foil that covers the container at the top, the clamping channel comprises a narrowed lateral insertion slot with an upper and a lower protrusion, to which the foil can be wrapped around. A lower wall of the clamping channel is wider than the thickness of the clamping rail at the facing longitudinal edge which is formed as a flat profile, the upper wall of the clamping channel is at least twice as wide as the thickness of the clamping rail. The insertion profile can be inserted into the clamping channel through the entry. When the foil that is wrapped around the insertion profile is under tension, the insertion profile is retained in the clamping channel by the protrusions.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    Not applicable. 
       STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH 
       [0002]    Not applicable. 
       BACKGROUND OF THE INVENTION 
       [0003]    The invention relates to a container wall according to claim  1  or  3  and an outer formwork for producing the container wall according to claim  22 . 
         [0004]    Container for storing and fermenting of ferments, for example in so-called biogas plants have considerable dimensions. They are mostly designed silo-like and thus have mostly a circular base. The wall is for example cast from concrete and the sealing to the top is often realized by a roof shaped foil, which is held in a tense and raised state by gas production or by a introduction of compressed air. For the secure fixation of the foil at the rim to the container wall, it is also known to install a clamping profile to the upper outer portion of the wall, into which the foil can be inserted and be affixed by the use of a clamping tube. 
         [0005]    From DE 10 64 869 A it is known, to insert the rim of a foil that seals a container to the top into a circumferential slot that has a U-shaped cross section and subsequently inserting an inflatable tube in order to fixate the rim of the foil. From DE 10 2006 035 227 B3 it is known, to attach a gas container as well as a covering hood from foil material in a C-shaped rail that is mounted to the outside of the container, wherein a clamping tube is inserted to the rail for the fixation of the foil inside the rail. 
         [0006]    Depending on the prevailing gas pressure in the container, the supporting air pressure or the external influences, corresponding tensile forces are introduced into the rail via the foil. There is therefore the risk that the foil slips out of the rail due to a deformation of the clamping profile or a lack of clamping force. 
         [0007]    This can as well be counteracted in practice by solid flanging of the foil(s) to the container. The foil can be loaded until disruption. Disadvantageous is the additional effort for opening the cover, for example for maintenance purposes. In addition the cover can lose its function when the foil ruptures, which must be avoided. 
       BRIEF SUMMARY OF THE INVENTION 
       [0008]    The objective of the invention is to create a container wall for a container with a device for fixating a foil made of plastic material that seals the container roof-like at the top, which can easily be manufactured and assembled and especially also can withstand high tensile forces at the foil. A further objective is to create a simple outer formwork for a container wall. 
         [0009]    For the inventive container wall, which is preferably made of concrete, at the top section a clamping channel is provided that is open to the outside with a preferably lateral insertion slot, which height is less than the height of an oblong insertion profile, to which the foil can be wrapped around, that can be inserted into the clamping channel. According to an embodiment of the invention the lower wall of the clamping channel is just slightly wider than the thickness of the insertion profile at the facing longitudinal edge which is, for example formed as a flat profile, while the upper wall of the clamping channel is at least twice as wide as the thickness of the flat profile at the facing longitudinal edge. The insertion profile with the foil wrapped around is tilted towards the insertion slot through this inserted into the clamping channel and subsequently for example placed into a vertical position, so that with tensile forces at the foil it is pressed from inside against the protrusions which limit the insertion slot. High tensile forces can be absorbed with the help of such a construction without facing the risk that the foil slips out of the clamping channel. According to an embodiment of the invention the insertion profile comprises a predetermined breaking point, wherein it bents essentially around a horizontal axis when a predetermined maximal force acts on the foil. The insertion profile is preferably made of flat material, for example from sheet steal or plastic. It can be formed as a flat strip or bent or broken or it can be a more or less flat profile strip. The flat strip can have a rectangular, trapezoidal or angular cross section. 
         [0010]    Depending on the pressure conditions in the container and the wind force that acts on the roof foil considerable tensile forces are exerted on the foil rim. The risk is therefore, that the foil rim is being pulled out when the tensile forces exceed a certain value. This risk is increased, when the angle of the foil rim to the associated leg of the rail-shaped clamping profile takes up a larger value, so that the leg undergoes a deformation and is bent upwards and the traction between foil rim and clamping profile is reduced. 
         [0011]    In one solution it is ensured that especially for higher tensile forces on the foil the tensile force acting on the facing upper leg essentially introduced as a compression force to the leg and acts only as a smaller bending moment on the leg. Thus there is no disadvantageous deformation of the clamping profile with the result that the foil rim is being pulled out. 
         [0012]    Viewed in the cross section, the insertion slot of the clamping channel lies in a plane, which is obliquely directed downward, which means it lies in an acute angle to the overlying container wall. If the pressure in the container increases, this leads to a raising of the roof foil, whereby the angle is increased. This reduces the pull-out force at the clamping profile. By a tilting of the clamping profile, however a greater pull-out resistance is acquired. The foil rim for example extends in an angle of 30° to 45° to the horizontal. The leg of the clamping profile facing the foil rim preferably extends in the same angle. Thus, with the invention also with higher values of the pull-out force a secure anchorage of the foil rim is assured. 
         [0013]    In an embodiment of the invention the clamping channel or the clamping profile respectively is formed by profile rail, which is U-shaped or preferably C-shaped in the cross section and preferably arranged tilted. The container wall is preferably formed from concrete and the rail can be cast into the concrete wall. 
         [0014]    Alternatively such a profile rail can be mountable to the outside of the container wall. There are different design options. According to an embodiment of the invention one option is, that vertical mounting sections are attachable in intervals on the outside of the container wall, which preferably comprise a recess adapted to the cross section of the rail, in which the profile rail is inserted tilted and fixed, preferably by welding. The rail that is preferably made of longitudinal sections, which are subsequently connected to each other, is first bent and than positively connected to the mounting sections. These are then connected to the container wall, for example by suitable anchors. In a further embodiment of the invention in this regard it is intended, that the mounting section is U-shaped in the cross section, wherein the recess is formed in the legs and the web of the mounting section is connectable with the container wall. 
         [0015]    Alternatively, a holding means comprise an angle profile, which is for example welded to the rail, wherein the angle profile is mountable to the outer wall of the container. 
         [0016]    The clamping profile in the form of a profile rail which is preferably C-shaped in the cross section, can be cast into the container wall. In this solution according to the invention a high pull-out force can be also obtained, if the clamping profile is arranged a certain distance to the upper edge of the container wall. A deformation of the leg of the rail facing the foil rim is no risk. 
         [0017]    In a further embodiment of the invention the upper edge or the upper leg of the profile rail is flush with the top of the container wall. In a further embodiment of the invention, the top of the container wall can rise towards the outside. 
         [0018]    If the clamping profile or the profile rail respectively is cast to the container wall in a distance to the top of the container wall, the outer upper edge of the wall is rounded according to a further embodiment of the invention. In this way the foil is not loaded as much. 
         [0019]    As already indicated, the invention is particularly advantageous, if the profile rail is in a tilted position, to increase the pull-out force and to reduce the bending load at the associated leg respectively. At the profile rail mounted to the outside of the wall, the upper leg is loaded with the tensile force of the foil in particular. The tensile force produces a bending moment. The tilted arrangement allows an extension of the leg of the profile rail facing the foil in a direction approximately parallel to the foil or in only a small angle to it. Thus a small-scale profile rail can be used to achieve the same pull-out forces as in conventionally mounted profile rails whose insertion slot is for example in the vertical or whose upper leg forms a larger angle to the foil respectively. With an integration of a profile rail into the material of the container wall the thickness of the material of the profile rail, which is preferably formed from flat material, can be very small, since the forces are largely absorbed by the surrounding material of the container wall. Also with the arrangement of the profile wall in recesses of vertical mounting sections it is ensured that a significant resistance is opposing the bending of the upper leg of the profile rail, whereby the risk of pulling out the foil rim is considerably reduced. 
         [0020]    The invention is also related to an outer formwork for the production of a container wall from concrete. With the help of a formwork a clamping profile can be easily produced in the concrete wall. According to the invention, one option is that a profile rail which is U- or C-shaped in the cross section is detachably mountable to the outer formwork elements, wherein the connection between these parts is accessible from the outside. When filling the formwork with concrete, the profile rail is automatically embedded in the wall. Before removing the formwork, the connection of the other formwork with the profile rail is released. The profile rail can also be mounted to a formwork, so that the upper leg is approximated to the extension direction of the foil or its insertion slot in the cross section respective extends in a plane that is obliquely directed downward. 
         [0021]    In general according to the invention it is also possible, to form the clamping profile by a suitable positive profile on the outer formwork. Synthetic material used for the positive profile can be removed with heat and/or chemical substances, so that a clamping channel is formed in the wall for the fixation of the foil rim with a suitable clamping element. The clamping element is either an inflatable clamping tube or the already mentioned insertion profile to which the foil rim is wrapped around. In the event of a tensile force the foil rim together with the clamping element is applied against the inside of the clamping profile or its protrusions in the area of the insertion slot. 
         [0022]    According to an embodiment of the invention the attachment means comprise at least one hole at the top of the formwork elements as well as a plug- or screw connection for a profile holder, which in turn is designed so that it temporarily fixates a profile rail or a formwork rail to the formwork element before filling in the concrete and after filling the concrete a profile rail or a formwork rail can be brought out of engagement with the formwork element by releasing the attachment means and tilting movement with the profile rail or the formwork rail respectively. For this purpose the profile holder can comprise a first sheet-metal portion, which in an approximately right angle to the insertion slot engages behind the foil limiting protrusions of the profile rail or of the formwork rail from the inside and comprising a transversally thereto disposed second sheet-metal portion, which is placeable on top of the formwork and comprises a mounting hole that is aligneable to the hole in the formwork element. The plug connection can comprise a pin as well as a clamping portion for the clampingly fixation of the second sheet-metal portion at the top of the formwork element by rotation of pin and clamping element. 
         [0023]    Finally, below the top of the formwork element and below the clamping profile or the formwork profile respectively a C-shaped running rail, which is composed of individual running rail elements can be connected to the formwork element to embed the running rail in the concrete of the container wall. Such a running rail allows the attachment of a carriage at the outside of the container wall, wherein it is suspended from rollers that roll in the running rail. Such a design possibly spares the attachment of a platform extending around the container. The running rail elements can be connected to the profile rail elements at the outset, preferably by welding. 
     
    
     
       BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS 
         [0024]    Below embodiments of the invention are illustrated by drawings in greater detail. 
           [0025]      FIG. 1   a  shows a schematic plan view of a container. 
           [0026]      FIG. 1   b  shows a section through the illustration according to  FIG. 1  along the line  2 - 2 . 
           [0027]      FIG. 2  shows a detail III according to  FIG. 1   b  for the fixation of a roof 
           [0028]      FIG. 3  shows a further embodiment for the fixation of a roof foil. 
           [0029]      FIG. 4  shows a further embodiment for the fixation of a roof foil. 
           [0030]      FIG. 5  shows a further embodiment for the fixation of a roof foil. 
           [0031]      FIG. 6  shows a further embodiment for the fixation of a roof foil. 
           [0032]      FIG. 7  shows a further embodiment for the fixation of a roof foil. 
           [0033]      FIG. 8  shows enlarged for example a profile rail according to  FIG. 6 . 
           [0034]      FIG. 9  shows a profile rail, but on the outside of the container wall in a tilted position 
           [0035]      FIG. 10  shows an attachment profile for a profile rail according to  FIG. 9   
           [0036]      FIG. 11  shows indicated an outer formwork for a container wall according to the invention. 
           [0037]      FIG. 12  shows the attachment of a profile rail to the formwork according to  FIG. 11 . 
           [0038]      FIG. 13  shows the view of the profile rail according to  FIG. 12  in the direction of arrow  13 . 
           [0039]      FIGS. 14 to 17  show various views of clamping attachment elements for a profile holder according to  FIG. 12  or  13  respectively. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0040]    While this invention may be embodied in many different forms, there are described in detail herein a specific preferred embodiment of the invention. This description is an exemplification of the principles of the invention and is not intended to limit the invention to the particular embodiment illustrated 
         [0041]    In  FIGS. 1   a  and  b  is indicated a container  10 , which base plate  12  comprises concrete and a cylindrical wall  14 , also made of concrete. The concrete wall is, for example, made with a variety of formwork elements which are arranged outside and inside. To the top at least one plastic foil  16  is spanned over the container  10 , wherein its rim is fixed at the upper area on the outside of the wall  14 , as will be further described below. In the container is, for example, a ferment  18 . On the outside of the wall  14 , a peripheral platform  20  with railings is shown. The platform consists of individual platform elements, which can also be connected to each other. The platform is not important for the invention. In  FIG. 1   b  furthermore is indicated a outer formwork  26  and a inner formwork  27 . It serves, as mentioned, for the production of the wall, wherein the formwork is removed after construction of the concrete wall  14 . 
         [0042]    In  FIG. 2  at  110  the upper part of the container wall is shown, as it can be seen in  FIG. 3 . It contains a clamping channel  112 , that comprises a bottom  114 , an upper wall  116  and a lower wall  118 . At the transitions the walls are curved in the cross section. By downward and upward pointing protrusions  120  and  121  (in the cross section) respectively, a narrowed insertion slot  124  is formed to the channel  112 . A clamping element in form of a flat profile  126  has approximately the same dimensions over its height and its thickness and is rounded at the edges. The thickness of the flat profile  135  is larger than the height of the insertion slot  124  and is sized, so that it is held by the inner sides of the protrusions  120 ,  122 , when the flat profile  126  touches the lower wall  118 . This is in its height or width respectively only slightly larger than the thickness of the flat profile  126 , as can be clearly seen in  FIG. 2 . The upper wall  116  is, however, significantly higher or wider respectively than the thickness of the flat profile  126 , at least twice of its thickness. Shown in broken lines, in the pivoted position of the flat profile  126 , shown at  126 ′, it can be inserted into the channel  112  via the insertion slot  124 . Before this happens, a foil  130  is wrapped around the flat profile  126 . After inserting the flat profile  126  with the foil  130  and the placement of the flat profile  126  to the wall  118  a tilt back of the flat profile  126  into an approximately vertical position parallel to the insertion slot is realized by a pull on the foil  130 . Thus the foil  130  is clamped in the channel  112  and can not be pulled out. 
         [0043]    As can be seen further, the flat profile  116  comprises a notch  132 , which forms a predetermined breaking point. In case of an accident the predetermined breaking point as a last instance prevents a rupture of the foil and can provide emergency relief. 
         [0044]    It is understood, that the clamping channel  112  can also, for example, be produced from a separate profile rail, which is further described below. For the fixation of the foil the profile of the clamping channel and the clamping element in the clamping channel are essential. 
         [0045]    In the  FIGS. 3-5  a section through the upper portion of the container wall  14  is shown, which is, however, structured differently in the upper portion, as described below. It can also be seen an outer- and inner formwork  26 ,  27  according to  FIG. 1   b  in production of the container wall of concrete. 
         [0046]    In  FIG. 3  a box-shaped or in the cross section C-shaped profile rail  36  is shown, which has, for example, a shape as shown in  FIG. 2 . This will be further discussed below. As can be seen, the profile rail  36  is integrated in the wall  14 , so that the upper side or the upper leg respectively is flush with the horizontal top of the wall  14 . During the production the profile rail  36  is detachably connected to the outer formwork  26  (not shown). After forming the wall  14  naturally the formwork  26 ,  27  is removed, wherein beforehand the detachable connection to the outer formwork  26  is released. The profile rail  36  is than connected to the wall  14 . 
         [0047]    The profile rail consists of individual segments of specific length, which is preferably significantly smaller than the circumferential length of the container  10 . Thereby, a rail segment can be connected to one or more adjacent formwork elements. The profile rail  36  or its individual segments respectively are provided with anchor portions, which, as shown at  38 , extend obliquely downward into the wall  14 . They are already located in the profile rail  36 , when it is mounted to the outer formwork  26 . In  FIG. 3  arrows  40  indicate the direction of the tensile force of a foil, which is referenced as  16  in  FIG. 1   b . It is fixated in the profile rail  36 . This is further described below. The different angles of the pulling direction  40  result from the type of foil (gas storage foil, air-supported dome) and structural conditions. Depending on the size of the angle, load and bending force at the upper leg of the profile rail are modified. 
         [0048]    The embodiment according to  FIG. 4  differs to that according to  FIG. 3  in that the profile rail  36  is embedded in a distance to the top of the wall  14 . Again the profile rail  36  is first connected to the outer formwork  26 . The foil, that is affixed with its rim in the profile rail  36 , first extents vertically on the outside of the wall  14  and is guided obliquely upward on the wall  14  over a rounded edge  42 . The edge  42  reduces the strain that occurs with the deflection of the foil. 
         [0049]    In  FIG. 9  or  12  a C-shaped profile rail is shown, the way it can be embedded in the wall  14  like in the embodiment according to  FIGS. 3 and 4 . Therefore, the details of this rail shall be explained below. 
         [0050]    The profile rail  18   a  according to  FIG. 9 , having a C-shaped cross section, comprises a web  20   a  and two parallel spaced legs  22   a ,  24   a . The legs are bent at  26   a . The profile rail  18   a  that is shown is slightly tilted with obliquely downward pointing legs  22   a ,  24   a . An insertion slot  21  (seen in the cross section) is thus in a plane pointing downward. 
         [0051]    In  FIG. 5  the profile rail  18   a  according to  FIG. 9  is also embedded in the wall  14 , so that its upper edge is flush with the top of the wall  14 . This top, however, comprises a slope, as indicated at  44 . The slope is directed to the outside. The clamping rail  18   a  is in turn detachably connected with the outer formwork  26 , when the wall  14  is produced. Subsequently this connection is released, so that the outer formwork  26  can be removed. A tilted mounting of the clamping profile  18   a  has the advantage of achieving significantly higher pull-out resistance for the foil rim and a favourable strain on the profile rail. The upper leg is essentially strained in its extending direction rather than in bending. Hence the foil rim is held particularly secure in the clamping profile  18   a.    
         [0052]    The clamping of a foil  28  in  FIG. 9  is done by an inflatable tube  30  that is inserted into the clamping channel formed by the C-shaped profile rail  18   a  and subsequently inflated. The clamping is preferably at the inside of web  20   a  and legs  22   a ,  24   a  as can clearly be seen. The inwardly curved portions  26  prevent the tube  30  from being pulled out of the clamping rail  18   a  by a corresponding load. 
         [0053]    It is also possible to embed a clamping channel in the concrete wall with a formwork. This possibility is indicated in  FIG. 8 . In  FIG. 8  an upper profile portion  50  and a lower profile portion  52  are provided, which can be connected to each other using a screw connection  54 . In the area on both sides of the screw connection the profile portions  50 ,  52  form a protrusion  56 , which, when casting, forms a channel in the concrete wall  58 , as, for example, is indicated in several of the above figures. It is understood, that a plurality of profile portions  50 ,  52  are provided in circumferential direction, which can be connected to each other, namely via screw connections  60  and  62  respectively. The lower profile portion  52  is also connected via a flange  64  to an underlying not shown formwork element by a screw connection  66 . After casting and curing of the concrete for the construction of the wall  58  the screw connections  54 ,  60 ,  62  are released. The screw connections  60 ,  54 ,  62  comprise a screw bolt  60  and a cap nut  70 . As can be seen, the cap nuts  70  remain in the wall  58 , while the screw bolts  68  are unscrewed. After loosening the screw connections first the lower profile portion  52  can be removed by oblique lifting and lateral pull and then the upper profile portion  56  is removed from the so formed channel by a diagonal motion. 
         [0054]    In  FIG. 9  the profile rail  18   a  is mounted to the outside container wall  10   a . At the back of the web  20   a  a leg of an angle profile  12  is welded with the wall  10   a , as indicated at  16   a . As indicated at  14   a , the other leg of the angle profile  12  is anchored with the wall  10   a  in an appropriate manner. 
         [0055]    In  FIG. 10  shows again the profile rail  18   a  according to  FIG. 9 . It shall thereby no longer be described in detail.  FIG. 10  also shows a fastening profile  80 . It has a certain vertical length, of, for example, 0.15 m. In the cross section it is U-shaped with a web  82  and two legs, one of which is shown at  84 . In the upper area of the fastening profile  80  the legs  84  are provided with a triangular recess  86 . The profile rail  18   a  is inserted and affixed in this in a tilted position, for example, in an angle of 45°. The fixation is, however, done only after the sections of the profile rail  18   a  are bent in the correct round shape, corresponding to the outer radius of the container, to which the profile rail  18   a  should be mounted. Holes  86   a  are formed into the web of the fastening profile  80 , so that the fastening profile  80  can be mounted vertically to the outside container wall, for example, the wall  10   a  in  FIG. 9 , by means of screws or anchors respectively. 
         [0056]    Instead of embedding a clamping profile in the form of a profile rail in the wall, a positive profile of plastic can be attached to the formwork, which is then removed from the wall, for example by heat or a reagent. This leaves a clamping profile in the wall with the same function as a clamping rail. 
         [0057]    In  FIGS. 6 and 7  other ways to form a clamping profile are indicated. In  FIG. 6  an outer formwork element  40   a  is detachably connected with a fiber concrete section  42   a , wherein the detachable connection, which must be accessible from the outside, is not shown. The fiber concrete section  42   a  comprises a ready-made channel  44   a  and is, in the casting, embedded in this (wall  14   a ). The fiber concrete section  42   a  can be ready-made. It can already be connected to the formwork element  40   a  in a distance, before it comes to the work site or it can be connected to the formwork element  40   a  at the work site. 
         [0058]    For the sake of completeness it should be mentioned, that is talked of only a single formwork element or profile formwork section. It is understood, that in circumferential direction a plurality of outer formwork elements  40   a  are provided and also a plurality of formwork profile sections  42   a.    
         [0059]      FIG. 7  shows another possibility. Here, a concrete element  46   a  is put on top of the concrete wall  14   b , which is provided with clamping channel  44   a . The concrete element  46   a  is ready-made and comprises reinforcement  48   a  that is standing downward and to the outside, which can be inserted into the soft concrete after casting the wall  14   b , for connecting the concrete element  46   a  with the wall  14   b.    
         [0060]      FIG. 11  shows indicated a formwork  200  for a container comprising a concrete wall, namely the outer formwork. The outer formwork consists of lower formwork elements  202 , which are set up in a ring and thereby form the outer wall of the container, not shown. On top of the lower formwork elements  202  upper formwork elements  204  are placed and connected to each other with, for example, screw connections. For this purpose the formwork elements  202 ,  204  comprise aligned mounting holes  206  and  208  respectively. The upper formwork elements  204  form the upper rim of the container. They also have holes at the top, one of which is shown at  210 . In addition,  FIG. 11  shows a sheet-metal portion  212  that can be mounted on top of the formwork elements  204 . 
         [0061]    In  FIG. 12  an upper outer formwork element  204  is indicated and also the sheet-metal portion  212  with its mounting hole  214 . It can be seen that a vertical sheet-metal portion  216 , which comprises a rectangular slot  218  at the upper end and a protrusion  220  at the lower end, is welded to the horizontal sheet-metal portion  212 . In  FIG. 12  also the cross section of a profile rail  222  is indicated, which has the form of a slightly compressed C-profile with a sloping upper wall  224  or leg, a substantially curved lower wall  226  or leg and a bottom  228 . The dimensions of the upper and lower wall are such that the width of the clamping channel  230  inside the profile rail  222  is considerably larger in the upper area than in the lower area. For this purpose also the bottom  228  is arranged at an angle. The cross section of the clamping channel  230  is similar to that of  FIG. 2 , wherein unlike in  FIG. 2  the upper wall  224  runs obliquely upwards. This provides the advantage that the profile rail  222 , as shown in  FIG. 9 , can absorb the tensile force from the foil, not shown, as compressive load in the upper leg  224 . The clamping channel  230  is adapted to receiving a flat profile (as per  FIG. 2 ) to affix a foil in the clamping channel  230 . 
         [0062]    The sheet-metal portion  212 ,  216  are part of a profile holder, to hold the profile rail  222  at the formwork element  204  before embedding in the wall  232 . With the help of a device, shown in  FIGS. 14 to 17 , a profile holder can be effectively attached to the formwork element  204 . For this purpose the device according to  FIGS. 14 to 17  comprises a pin  240  that is affixed to an angle section  242  of sheet-metal, for example by welding. On the leg of the angle section  242  away from the pin  240  a slot  244  is formed. A handle portion  246  is connected to the angle section  242 . For the attachment of the sheet-metal  212  to the sheet-metal portion at the top of the formwork element  204  the pin is inserted through the holes  214 ,  210 . Thus the slot  244  is oriented approximately to the sheet-metal portion  212  and the sheet-metal of the formwork element  204 . By an appropriate rotation of the device according to  FIGS. 14 to 17  the slot is placed over the associated sheet-metals, which are thereby clamped against each other. In this way the profile holder is securely fixed to the formwork element but can be also easily removed. 
         [0063]    As further shown in  FIG. 12 , here a concrete wall  232  is already created, wherein the inner formwork elements are not shown. The concrete wall comprises reinforcements  252 . In addition it can be seen that a running rail  254  with a C-section is connected to the underside of the profile rail  222  by welding. It is therefore also be held by the profile holder until the concrete is cured. The running rail  254  is used to hold one or more rollers  256  for a not shown carriage that is suspended on the outside of the wall  232  and can be run around the container using the running rail  254 . 
         [0064]    This completes the description of the preferred and alternate embodiments of the invention. Those skilled in the art may recognize other equivalents to the specific embodiment described herein which equivalents are intended to be encompassed by the claims attached hereto.