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The invention concerns a transportable stand with elements which can be assembled from individual parts and be dismounted, which comprise a supporting structure and telescopic parts and cheeks which can be mounted thereon at different angles of inclination to the horizontal, which hold step elements for installation of mounting parts such as seats and rails. 
     BACKGROUND OF THE INVENTION 
     A stand construction of this type has been disclosed by a stand of the company Arena Seating. 
     In the conventional stand construction, cheeks are mounted to a supporting structure, which are either prolonged or shortened, through telescopic elements, at both ends depending on the inclination of the cheeks to the horizontal. The known cheeks can be used at different inclinations by providing mounting means for step elements on one cheek side and also on the cheek side diametral thereto with different separations from the respective cheek end. 
     To be able to offer an extended number of seats and more standing space at venues or in halls, transportable stands are known which consist of a plurality of individual parts and require a lot of time for assembly and/or disassembly. The individual stand parts are often large and heavy such that the stands, which are usually to be mounted without the assistance of a crane, are difficult to handle. 
     It is the underlying purpose of the invention to design stands which can be used according to the local requirements with easy assembly and/or disassembly and to reduce the number of or simplify the different elements required for assembly and/or disassembly. 
     SUMMARY OF THE INVENTION 
     This object is achieved in accordance with the invention in that the cheeks can be pivoted independently of the angle of inclination to the horizontal about a point of rotation which lies in the region of a first cheek end, and that each individual cheek has a first receiving point for the step elements which either coincides with the point of rotation or is disposed directly next to the point of rotation. 
     The stand construction comprising the inventive cheeks is advantageous in that step elements to be mounted to the cheeks always have a fixed predetermined first receiving point independent of the angle position of the cheeks to the horizontal where the first or last step element is mounted. Mounting of the inventive stand precludes or greatly reduces erroneous assembly of individual parts required for assembly since the screen for the step elements to be disposed on the cheeks always starts or terminates at the same first receiving point. An inventive cheek must be prolonged or shortened at only one end since the step elements used always terminate in the fixed first receiving point. The first receiving point for the step elements is also always the same, independent of the respective inclined position of a cheek. The first receiving point is not displaced in height and does not carry out a lateral motion when the angle positions of the cheeks vary. The bringing together of the point of rotation of a cheek in a different angle position and the first receiving point of a cheek for a step element further simplifies the overall construction. In total, the inventive construction reduces the number of elements required for assembling a stand and also reduces the number of different concrete designs of the elements. 
     In a further embodiment of the invention, the point of rotation has the same separation from the first end of the respective cheek irrespective of the length of a cheek. This is advantageous in that all inventive cheeks used in the stand construction are moved, i.e. pivoted, in the same fashion to obtain the predetermined end position of a cheek desired in the assembled state. If the points of rotation are equally fixed to each cheek, the overall stand structure is simplified. 
     In a further embodiment of the invention, the cheeks, telescopic parts, step parts and mounting parts can be joined to one another or joined to the supporting structure via secured plug and/or catch connections. 
     This is advantageous in that no loose individual parts are used for assembly of the stand and additional time-consuming screwing or wedging can be omitted. All connecting parts such as cheeks, step elements, telescopic parts, receiving heads, securing means, seat and/or rail connections can be coated with elastic surfaces and/or with elastic formations, profiles to connect the overall construction or individual connections of this construction in a sound-proof, in particular impact-sound-proof, sealed or play-free fashion. This measure eliminates noise which could be produced by individual elements under load. 
     In a further embodiment of the invention, the plug and/or catch connections are formed such that they are self-locking when connected which guarantees permanent secure assembly of the stand since security and safety checks are not required for a stand built with the inventive elements. 
     In a further embodiment, receiving heads are formed on the supporting structure of the inventive stand design, which receive the first end of a cheek and/or an end of the telescopic part. 
     This is advantageous in that no particular connecting elements are required between supporting structure and the cheeks to be mounted thereto. The receiving heads can securely and permanently hold the cheeks at the most different inclinations without additional screwing or bolting or wedging. 
     The receiving heads are formed to receive cheeks and telescopic parts which can be oriented at least at two different angles of inclination to the horizontal such that the same receiving heads can be used for any stand construction. 
     In a preferred embodiment of the invention, the receiving heads, holding a first end of a cheek, hold bolts which laterally project from the cheeks, wherein in the assembled state of the parts at least one bolt is overlapped by the respective receiving head and the bolts additionally project into a cavity which is limited by cheeks produced from a hollow section. One end of a telescopic part projects into this cavity and at least partially surrounds the bolts or rests on the bolts. The telescopic head of the telescopic part may be supported on the inner surface of a cheek for load relief and further means can be provided to connect and secure the connection to be created for forces acting in the horizontal direction. 
     This measure produces simple, permanent and safe connecting possibilities. The connections can be quickly formed and released with simple movements. 
     In a further development of the invention, recesses or mounting points are provided on an outer side of the cheek at defined separations into which profiled ends of the step elements engage or the profiled ends are mounted at the mounting points. 
     This is advantageous in that the step elements can be securely held on the cheeks via the most simple mounting means. Such cheeks can be produced at low cost and are easy to handle. 
     If the recesses are formed as openings of approximately twice the length of a width of a profiled end, laterally adjoining step elements can be introduced at one cheek. Only one opening is required at one cheek for both step elements. In a preferred embodiment, at least one of the profiled ends of a directly adjoining skeleton step or riser projects into the hollow section of the individual cheek and is immovably held on the cheek in a self-locking fashion or via fixing elements. This is advantageous in that the compelling sequence of the elements to be mounted, prevents having to work over gaps when the skeleton steps and risers are disposed on the cheeks. 
     The overall stand system is further facilitated if the step elements are formed from risers and skeleton steps, wherein the skeleton steps have the same step depth irrespective of the inclination of a cheek to the horizontal, and if openings are provided at the step edge bordering the risers for receiving the mounting elements. The same skeleton steps are used for any angle position of a cheek, and the step elements have openings for receiving seats or rail constructions. The seats or rails must be inserted into the openings provided for this purpose and are held in the openings in a self-locking fashion. The risers can also be simplified if they can be folded at some height and thus be adjusted to the most different angle positions of the cheeks in a simple way. The foldable section to extend a riser can be hinged to the skeleton step and/or the riser itself. For different angle positions of the cheeks, risers of different heights are provided. If e.g. cheeks of a length of 2.50 m are used for mounting a stand on a supporting structure with 50 cm height grid, and the step elements are mounted to the cheeks in accordance with the invention, skeleton steps of a step depth of 75 cm can be used for different angle positions of 0°, approximately 11° and approximately 22° and the risers have a height of 15 cm for an angle position of the cheeks of approximately 11° and, for an angle position of the cheeks of approximately 22°, a height of 30 cm. 
     If the smallest common multiple of step depth and a grid width of the supporting structure is larger than a grid width but smaller than approximately five times the grid width, all desired angles of inclination of a stand can be produced with one single embodiment of a cheek. In a preferred embodiment, with a uniform cheek length of 2.50 m, platforms are possible after every three grid widths. If cheeks of different lengths are combined, horizontally oriented platforms can be produced in shorter recurrent separations. To provide safe escape paths with the inventive stand construction, horizontally oriented cheek lengths of 75 cm are sufficient when they are connected to inclined cheeks of a length of 2.50 m. If the angle position of an inclined cheek is approximately 11°, the cheek must be prolonged to approximately 2.55 m through the telescopic part. If the angle position of a cheek is approximately 22°, the cheek is to be extended to approximately 2.69 m through a telescopic part. The predetermined lengths refer to a horizontally oriented cheek (0°) of 2.50 m and a height grid of 50 cm or 100 cm at the supporting structure. 
     Further advantages can be extracted from the description and the enclosed drawing. The features mentioned above and below can be used in accordance with the invention either individually or collectively in any arbitrary combination. The embodiments mentioned are not to be understood as exhaustive enumeration but rather have exemplary character for describing the invention. The step elements can be mounted on any type of cheeks. The described step elements must not necessarily be used with the described cheeks. 
     If rail posts are mounted to the step elements, these rail posts can be inserted into cavities of the skeleton steps and/or risers and further fixing and/or securing of the rail posts can be effected through engagement into the openings in the cheeks. The skeleton steps and risers can also be of one piece such that a step element is formed from one single element. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention is shown in one embodiment in the drawing: 
     FIG. 1 shows an inventive cheek connection with receiving heads; 
     FIG. 2 shows the inventive cheek connection of FIG. 1 on an enlarged scale; 
     FIG. 3 shows a perspective view of inventive cheek elements with inventive step elements shown in sections; 
     FIG. 4 shows a connection between an inventive cheek and an inventive telescopic part with the possibility to mount and dismount an inventive step element; 
     FIG. 5 shows the connection of a telescopic part to a first cheek end; 
     FIG. 6 shows a side view of a further inventive embodiment of a cheek connection with two skeleton steps and one riser; 
     FIG. 7 shows a side view of FIG. 6 on an enlarged scale showing the connection of a telescopic part to a cheek; 
     FIG. 8 shows a perspective view of a skeleton step in accordance with FIGS. 6 and 7 adjoining a horizontally oriented cheek; 
     FIG. 9 shows a sectional representation of a skeleton step which is seated and secured on a horizontally oriented cheek; 
     FIG. 10 shows a rear view of a riser and skeleton step which seats on a horizontally oriented cheek. 
    
    
     DETAILED DESCRIPTION 
     In FIG. 1, reference numeral  10  illustrates elements of a stand which can be mounted and dismounted, comprising a first cheek  11 , a second cheek  12  and a third cheek  13 . The cheeks  11 ,  12 ,  13  are interconnected via a first telescopic part  14  and a second telescopic part  15 . The first cheek  11 , the second cheek  12  and the third cheek  13  are held at a first end  16 ,  17 ,  18  of the cheeks  11 ,  12 ,  13  via receiving heads  19  which are supported by a supporting structure, e.g. a scaffold structure. The supporting structure is a construction known from the state of the art which is therefore not shown in FIG.  1 . 
     In FIG. 1, the first cheek  11  is inclined to a first angle position  20  i.e. at an angle of inclination to the horizontal of e.g. approximately 22°. The second cheek  12  is shown in a second angle position  21 , e.g. 0° and the third cheek  13  is shown in a third angle position  22 , inclined to the horizontal by approximately 11°. 
     The cheeks  11 ,  12 ,  13  serve for mounting step elements which generally consist of skeleton steps and risers. Mounting parts such a seats and rails can be mounted to the step elements which are not shown in the figure. 
     The cheeks  11 ,  12 ,  13  of the inventive stand construction can be pivoted about points of rotation  23 ,  24 ,  25  which are in the region of the first ends  16 ,  17 ,  18 . In the region of the first ends  16 ,  17 ,  18 , holding means are provided on the cheeks  11 ,  12 ,  13  which are received by the receiving heads  19 . The cheeks  11 ,  12 ,  13  are formed of a hollow section. The ends of the cheeks  11 ,  12 ,  13 , opposite to the first ends  16 ,  17 ,  18 , are provided with telescopic parts  14 ,  15  for connection to a further cheek and for interconnecting the adjoining cheeks  11 ,  12 ,  13 . The telescopic parts  14 ,  15  can be drawn out of the respective cheek ends to different lengths and be fixed in any position to keep a grid width predetermined by the supporting structure or the horizontally oriented cheek length in dependence on a predetermined angle of inclination to the horizontal. If step elements are disposed on the cheeks  11 ,  12 ,  13 , these step elements are disposed irrespective of the angle of inclination to the horizontal of a cheek  11 ,  12 ,  13  always such that the first or last step element is mounted in a first receiving point  26  (depending on the direction of assembly) which coincides with the point of rotation  23  or is formed directly next to the point of rotation  23 . 
     FIG. 1 shows two cheek lengths. The length of the first cheek  11  corresponds to the length of the third cheek  13 , the second cheek  12  for the second angle position  21  of 0° is shorter than the first cheek  11  and the third cheek  13 . The angle position  20  is approximately 22° and the angle position  22  is approximately 11°. 
     FIG. 2 shows, compared to FIG. 1, an enlarged view of the cheeks  11 ,  12 ,  13 . The cheeks  11 ,  13  are displayed shortened for a better overview. The cheeks  11 ,  12 ,  13  are interconnected via the first telescopic part  14  and the second telescopic part  15 . The receiving heads  19  hold the cheeks  11 ,  12 ,  13  at the first end  16 ,  17 ,  18  in that bolts  27 ,  28 ,  29  formed on the cheeks  11 ,  12 ,  13  engage in recesses of the receiving heads  19 . The bolts  27 ,  28 ,  29  are disposed on a circular arc whose center is in the point of rotation  23 ,  24 ,  25 . The radius from the point of rotation  23 ,  24 ,  25  to the circular arc with the bolts  27 ,  28 ,  29  is always the same in the inventive cheeks  11 ,  12 ,  13 . The position of the bolts  27 ,  28 ,  29  on the circular arc may differ depending on the desired inclination of the cheeks  11 ,  12 ,  13  within an overall stand construction. The recesses, formed on the receiving heads  19 , for the bolts  27 ,  28 ,  29  are selected such that they can receive the bolts  27 ,  28 ,  29  in different angle positions of the cheeks  11 ,  12 ,  13  and are designed such that at least one bolt  27 ,  28 ,  29  is overlapped by a hook-shaped end  30  of a receiving head  19 . The hook-shaped ends  30  of the receiving heads  19  secure the connection between the receiving head  19  and a cheek  11 ,  12 ,  13  from inadvertent release of the connection between receiving head  19  and the cheek  11 ,  12 ,  13 . 
     FIG. 3 shows a partial spatial section of an inventive stand construction with step elements  31  which are composed of skeleton steps  32  and risers  33 . The step elements  31  can be detachably mounted to the cheeks  11 ,  12 ,  13  in that profiled ends of the step elements  31  engage in openings  34  of the cheeks  11 ,  12 ,  13  which are formed on a cheek side  35 ,  36 ,  37 . The openings  34  formed on the cheek side  35 ,  36 ,  37  are separated from each other such that skeleton steps  32  with the same step depth can be mounted in or on the openings  34  independent of the angle position of the individual cheeks  11 ,  12 ,  13 , and a first step element is always mounted in the first receiving point. The telescopic parts  14 ,  15  comprise a mandrel  38  which can also engage in the openings  34  and which can determine the length of the telescopic part  14 ,  15  to be selected. A telescopic head  39  of the first telescopic part  14  is partially visible in FIG.  3 . The telescopic head  39  connects the first cheek  11  to the second cheek  12 . The supporting structure which is not shown in FIG. 3 holds the cheeks  11 ,  12 , and  13  via the receiving heads  19 . 
     In the transition region between a skeleton step  32  and a riser  33 , a series of openings  40  are provided which can receive mounting elements such as seats and rails. 
     FIG. 4 shows the transition region between a first cheek  11  and a second cheek  12 , partially in sectional view such that the profiled ends  41 ,  42  of the skeleton steps and risers  32 ,  33  are visible and also the securing lock  43  of the first telescopic part  14 . The profiled end  41  of the skeleton step  32  engages through one of the openings  34  and engages behind the first cheek  11  with the free end. The profiled end  42  of the riser  33  also engages in the opening  34  and is designed such that in cooperation with the profiled end  41 , it blocks or prevents vertical displacement of skeleton step and riser  32 ,  33 . The numerous openings  34  formed in the first cheek  11  are provided for the step elements  31  when the cheeks  11 ,  12  are mounted in different angle positions. With the mandrel  38 , the first telescopic part  14  engages through an opening  34  and is supported at one end via the telescopic head  39  on the second cheek  12 . The telescopic head  39  comprises additionally the securing lock  43  which secures connection between the first telescopic part  14  and the second cheek  12 . The first telescopic part  14  is supported on the other end via a supporting plate  44  on the inner surface of the first cheek  11 . 
     The bolts  27 ,  28 ,  29  serve as holding means for the receiving head  19  as well as for the telescopic head  39 . The bolts  27 ,  28 ,  29  project past the cheek outside and into the hollow section of the cheek  12  such that the telescopic head  39  can at least partially surround the bolts  27 ,  28 ,  29 . FIG. 4 shows the securing lock  43  in a position in which the first telescopic part  14  is undetachably connected to the second cheek  12 . 
     If a supporting structure with mounted cheeks  11 ,  12  is erected and the cheeks  11 ,  12  have mounting points like the openings  34  shown in FIG. 4, the skeleton steps and risers  32 ,  33  can be mounted to the cheeks  11 ,  12  such that no auxiliary construction or additional means is required. The skeleton step  32  is disposed on the second cheek  12  in the direction of the arrow  45  by pivoting the skeleton step  32  such that the profiled end  41  engages in the opening  34  and engages behind this opening  34 . If the skeleton step  32  is positioned, the riser  33  can be inserted into the opening  34  by pivoting it in the direction of the arrow  46 . If the riser  33  is vertically oriented and the profiled ends  41 ,  42  engage in the opening  34  as shown in the figure and the skeleton step  32  is hooked with the riser  33  through the mutual engagement, the skeleton step  32  and the riser  33  are rigidly and undetachably connected to the second cheek  12 . If the riser  33  shall be released from the second cheek  12 , the riser  33  must be pivoted against the direction of arrow  46  that far that the profiled end  42  can be removed from the opening  34 . If the riser  33  has been removed from the opening  34 , the skeleton step  32  can be released through motion of the skeleton step  32  against the direction of arrow  45  from the second cheek  12 . 
     If a further skeleton step  32  shall be disposed on a vertically oriented riser  33 , this skeleton step  32  is to be disposed on the riser  33  through a pivoting motion in the direction of arrow  47 . When the skeleton step is disposed on the riser  33 , nubs and noses engage behind the end of the riser  33  such that the skeleton step  32  is undetachably connected to the riser  33 . The skeleton step  32  can be released from the riser  33  only via a motion against the direction of arrow  47 . The mounting and dismounting of the skeleton step and risers  32  and  33  described for a step element  31  can be transferred arbitrarily to a step element adjoining a step element  31  such that the described assembly and disassembly of skeleton step and risers  32 ,  33  can produce stand constructions of any height and length. 
     FIG. 5 shows a cross-sectional view of the first cheek  11  and second cheek  12  to show the connection of the telescopic head  39  to the second cheek  12 . The securing lock  43  is kept in the telescopic head  39  such that it can be lifted and displaced in the direction of arrow  49 . In the position shown in the figure, the telescopic head  39  overlaps the bolts  27  and  28  with recesses formed on the telescopic head  39  and the securing lock  43  is shown in an end position in which the first telescopic part  14  is undetachably connected to the second cheek  12 . If the securing lock  43  is displaced into the other end position in the elongate hole  48 , the connection between the second cheek  12  and the first telescopic part  14  can be released. The skeleton step  32  and the riser  33  are inserted in the second cheek  12  in a self-locking fashion and a projection  50  is formed on the riser  33  which can house the openings  40  shown in FIG.  3 . 
     If the skeleton step  32  is connected to the riser  33 , a ball formed on the riser  33  is disposed in a socket of a ball and socket joint, which is formed in the edge region of the skeleton step  32 . Both the ball-shaped and the socket-shaped formation can extend across the entire length of a skeleton step and/or riser  32 ,  33 . A projection formed on the socket engages behind or into a recess on the ball of the riser  33  to produce an undetachable connection between skeleton step and riser  32 ,  33 . If the connection between the skeleton step and riser  32 ,  33  in the lower region, i.e. in the region of the cheek shall be released, the ball must at first be turned out or displaced out of the overlapping or locking engagement in the socket until both parts can be separated. 
     FIG. 6 shows a further embodiment of inventive elements of a stand which can be mounted and dismounted. The first cheek  11  is connected to a second cheek  12  via the telescopic part  14 . A skeleton step  62  which is detachably connected to a riser  63  is disposed on the cheek  12  which is held in its horizontally oriented position by a receiving head  19 . A further skeleton step  62  is held at the upper end of the riser  63 , and the other end of the further skeleton step  62  flatly rests on the inclined cheek  11 . Another riser  63  joins this end which has the same connection to the skeleton step  62  as shown in the right part of FIG.  6 . 
     The cheek  12  has an opening  64  via which a pin  65  of an end profile of the skeleton step  62  engages. The end profile of the skeleton step  62  has a catch  66  which engages behind an edge projection of the cheek  12  and undetachably connects the skeleton step  62  to the cheek  12 . A receiving pocket  67  is formed on the end profile of the skeleton step  62  opposite to the pin  65  into which the lower end profile of the riser  63  engages in a detachable fashion. The upper end of the riser  63  is provided with a further end profile with a recess  68  which holds a free end of the skeleton step  62  which is not supported on a cheek  11 ,  12 . 
     If a step element is to be disposed on an inventive cheek connection, at first the skeleton step  62  is disposed on the horizontally oriented cheek  12  in that the pin  65  is inserted into the opening  64 . With this inserting motion, one end of the catch  66  engages automatically in a free edge of the cheek  12 . If a riser  63  is to be inserted into the receiving pocket  67  of the skeleton step  62 , the riser  63  is disposed at an angle on the end of the skeleton step  62  in that the erected skeleton step  62  subtends an angle &lt;90° with the riser  63 . Subsequently, the riser  63  is pushed past the skeleton step  62  that far that the riser  63  falls into the receiving pocket  67 . In the still present inclined position of the riser  63 , the riser  63  is lifted and simultaneously vertically oriented in the direction of arrow  69  in an anticlockwise direction. Subsequently, the riser  63  is lowered and is held in the receiving pocket  67  in a position shown in FIG.  6 . If a further skeleton step  62  is to be connected to the riser  63  at the upper end of the riser  63 , a skeleton step  62  is vertically oriented and inserted into the recess  68  and subsequently lowered in an anticlockwise direction in the direction of arrow  70  that far until the other free end of the skeleton step  62  with the pin  65  engages into the opening  64  of the inclined cheek  11 . The end profile of the skeleton step  62  is formed such that it can flatly abut on an inclined cheek  11 . 
     If a riser  63  is inserted into the receiving pocket  67  and vertically aligned it blocks the pivoting region of the catch  66  and holds the catch  66  such that a free end of the catch  66  always engages behind a free edge section of the cheek  11 ,  12 . In the arrangement shown in FIG. 6, the skeleton steps  62  cannot be lifted from the cheeks  11 ,  12 . 
     If a step element is to be lifted from a cheek connection shown in FIG. 6, the riser  63  must firstly be lifted in the receiving pocket  67  until it can be turned out of the receiving pocket  67  in a clockwise direction. If the connection between the skeleton step  62  and the riser  63  is interrupted in that the receiving pocket  67  is free, the catch  66  is also pivotable and the skeleton step  62  can be lifted from the cheek  11 ,  12 . When lifting the skeleton step  62 , the catch  66  automatically opens i.e. it releases the engagement on the cheek  11 , 12 . 
     FIG. 7 shows the cheek connection of the cheeks  11  and  12  with a cut cheek  12 , how the two cheeks  11  and  12  are interconnected via the telescopic part  14 . The skeleton step  62  is disposed on the cheek  12  in that the pin  65  engages in the opening  64  of the cheek  12 . The end profile of the skeleton step  62  is undetachably held together with the cheek  12  via the catch  66 . An end of the riser  63  is inserted into the receiving pocket  67  of the end profile of the skeleton step  62 . The riser  63  is vertically oriented and the receiving pocket  67  is formed such that it comprises a free space when a riser  63  is inserted into the receiving pocket  67 . The free space permits that the vertically aligned riser  63  can be lifted in the receiving pocket  67 . If the riser  63  is lifted, it engages behind a hook-shaped formation on the end profile of the skeleton step  62 , and in the lifted state of the riser  63  it is possible to pivot the riser  63  in a clockwise direction such that it can be removed from the receiving pocket  67 . When the riser  63  is vertically oriented and inserted in the receiving pocket  67 , the catch  66  cannot be moved and connects the skeleton step  62  with the cheek  12  or cheek  11  in an undetachable fashion. 
     FIG. 8 shows a perspective view of a shortened and horizontally oriented cheek  12  onto which a skeleton step  62  is disposed. FIG. 8 does not show the entire width of the skeleton step  62 . A skeleton step  62  basically has in each free end region two opposing support points with pins  65  which engage in openings  64  of a cheek  12  in each case. FIG. 8 shows only one cheek  12 . The skeleton step  62  engages via the pin  65  into the opening  64 , and when the skeleton step  62  is disposed on the cheek  12 , an end of the catch  66  engages behind a free edge section of the cheek  12 . The catch  66  is fastened on the skeleton step  62  such that it can be pivoted about an axis  71 . The receiving pockets  67  are indicated in the figure into which ends of risers  63  can engage. If the skeleton step  62  is lifted from the cheek  12 , the catch  66  automatically pivots in that it releases the engagement on the cheek  12 . The skeleton step  62  can always be lifted from the cheek  12  when the receiving pocket  67  is not occupied by a riser  63 . 
     FIG. 9 shows a sectional representation of a skeleton step  62  disposed on a cheek  12 . The pin  65  of the skeleton step  62  engages in the opening  64  of the cheek  12  and the catch  66  engages behind a free edge section of the cheek  12  by correspondingly turning about the axis  71 . 
     FIG. 10 shows a rear view of a skeleton step  62  and a riser  63  disposed on the one cheek  12  on a side. The catch  66  engages behind a free edge section of the cheek  12 , and in the arrangement shown, the skeleton step  62  cannot be lifted from the cheek  12 . 
     In a stand with elements which can be mounted and dismounted from individual parts, and which comprise a supporting structure and telescopic parts  14 ,  15  which can be mounted thereon at different inclinations to the horizontal, and cheeks  11 ,  12 ,  13  which hold step elements for mounting mounting parts such as seats and rails, the cheeks  11 ,  12 ,  13  can be pivoted independently of the inclination to the horizontal about a point of rotation  23 ,  24 ,  25  which is located in the region of a first end  16 ,  17 ,  18  of a cheek  11 ,  12 ,  13 . Each individual cheek  11 ,  12 ,  13  has a first receiving point for step elements and the point of rotation  23 ,  24 ,  25  of a cheek  11 ,  12 ,  13  either coincides with the first receiving point  26  for the step elements or it is directly neighboring to the point of rotation  23 ,  24 ,  25 .

Summary:
The invention relates to a stage, comprising elements, which may be assembled and disassembled from individual pieces, as part of a sub-structure with telescopic pieces ( 14, 15 ) and bars ( 11, 12, 13 ) fixed thereto, at various angles to the horizontal, to which may be fixed stepped elements for the attachment of superstructure pieces such a seats and railings. Said bars ( 11, 12, 13 ), may be pivoted about a pivot point ( 23, 24, 25 ), in the region of a first end ( 16, 17, 18 ) of a bar ( 11, 12, 13 ), in a manner independent of the angle to the horizontal. Each individual bar ( 11, 12, 13 ) comprises a first attachment point for stepped elements and the pivot point ( 23, 24, 25 ) of a bar ( 11, 12, 13 ) is either congruent with the first attachment point ( 26 ) or it is immediately adjacent to the pivot point ( 23, 24, 25 ).