FR2587397A1 - CARRIER CONSTRUCTION FOR TRIBUNALS - Google Patents

Abstract

THE BEARING CONSTRUCTION 21 FOR STANDS 20 IS FORMED OF USUAL PARTS OF A SCAFFOLDING SYSTEM, INITIAL PARTS 32, HORIZONTAL CROSSBARS 28, UPRIGHTS 27, DIAGONALS 29 AND SPECIAL STAGE 30 PLAYING PARTS WHICH ARE USED IN SUPPORT FOR WALKING BOARDS 23 AND SEATS 22 AND ALLOWS THE CONNECTION OF BALUSTRADES 24.

Description

The invention relates to a load-bearing construction for stands with seats,

  step boards, stairs, possibly balustrades and possibly roofs, with vertical uprights and with connecting elements and horizontal and diagonal supports. We need forums on meeting places

  many kinds, especially in the case of compe

  titions on sports stadiums, circus, outdoor theatrical performances, etc. Either they are incorporated into the slope in a fixed position, or they

  are erected as a fixed position construction.

  For certain rows of staggered seats, to be

  assembled or disassembled, as, for example, under the chapters

  circus, or the like, constructions are known

special carriers.

  By the field of scaffolding construction, we know the different scaffolding systems, among which that which is due to the applicant and called "scaffolding for general use", in particular according to the patent

DE 24 49 124.

  Such scaffolds are formed of vertical tubular uprights and connecting and supporting elements and / or frames, horizontal and diagonal, and stiffening elements as well as connecting elements and

  couplings, compensating elements, and the like.

  Until now, they have only been erected in very thin frame constructions with a depth of about 50 cm to 1.50 m and more precisely, either on building walls and towers, or as load-bearing elements for temporary shed constructions with covering by tent or the like. Thanks to the highly developed technique, they can be assembled and disassembled quickly. For this purpose, multiple interlocking elements are used arranged

  rationally. So far, with such scaffold elements-

  dage, one cannot constitute load-bearing constructions for grandstands directly carrying the seats because it lacks the appropriate adaptation elements for the staggered support of stepboards and benches as well as the stairs necessary to have between them and

  balustrades to be placed outside, if necessary.

  The invention aims to propose a load-bearing construction of the species indicated at the start which can be assembled quickly and reliably using as much as possible of the load-bearing elements existing in standardized form for the

  construction of scaffolding and few additional elements

  special and that we can quickly disassemble again. According to the invention, provision is made for the uprights and the connecting elements and horizontal and diagonal carriers to be formed by scaffolding uprights and / or scaffolding frames, horizontal beams, horizontal crosspieces, straight rods, couplings, and the like, of a usual scaffolding system and that for staggered support of step boards and seats are provided staggered cheek pieces, equipped with connecting elements harmonized with the scaffolding system and in which the lower and upper connections of the supports as well as the horizontal spacings of the supports correspond to the modular dimension of the scaffolding system. By the proposal according to the invention, which tends to combine the existing elements with a special cheek part, it is now possible simply

  constitute complete stands according to the staging system

  and also to plan, plan and assemble their load-bearing construction accordingly. Multiple uprights, diagonals, horizontal struts, scaffolding frames, connecting and coupling elements from the standard program can be used and practically all that is required is a suitable side cheek piece which is harmonized with the planks usual steps and subdivided according to the basic modular system. Since the basic modular dimension varies from one scaffolding system to another, it is possible to some extent also to foresee the dimensions of the cheek part with adaptation to the needs, namely to the height of the seats and to slope. Naturally, we then still need the desired benches or individual seat carrying elements as well as possibly balustrade elements which can be manufactured by a conventional technique. The cheek parts can be formed in different ways and must be adapted to the scaffolding system in question, for example the position of the step boards, their width, etc. Possibly, for stiffening,

  appropriate connecting elements must be provided.

  A cheek part of this kind can then be constantly reused, in large number of copies, as a similar element of the whole platform-bearing construction, if it is harmonized with the other basic elements of the scaffolding system. . A large number of connection means can be added to the cheek part

  different from the usual scaffolding material.

  Thus, by the shape given to the cheek part and to a small number of other additional parts, one can, with

  the same material, create load-bearing constructions ration-

  for many types and extensions

  minimum and maximum, depending on the construction game system

  tion. A particularly advantageous execution of the cheek part provides two horizontal beams spaced in height between two sections of vertical tube, according to the pitch of the tribune and a vertical connecting element which connects them roughly in the middle. By combining two rows of seats and two rows of step boards for the feet, each in one cheek unit, we can very well adapt in a modular system of approximately 1.5 m pan size , having a slope of about 0.25 m and a cheek piece height of about 0.5 m. The cheek part can then also be manufactured economically, be well

  stored and transported and be mounted easily and efficiently-

  is lying. In the case of this quantity, it can also, with usable dimensions, obtain the necessary stability and makes it possible to arrange the necessary connection elements.

  depending on the use in question. In detail, it can be cons-

  sorted in many ways depending on the materials you want to use or combine, the subdivision that you want to operate into manufacturing sections, the way you want to connect the seats and the floorboards and the connection with the

other scaffolding elements.

  It is preferably provided that the lower tube section attached to the lower horizontal beam has a stud connection at the bottom and arrives at the top to a seat support and that the upper tube section attached to the upper horizontal beam has above and below an upright connection. So, we can easily connect the cheek part each time

  upper, by its lower tube section, by the inter-

  middle of the stud connection, to the

  amount of the upper end of the upper tube section

  laughing of the cheek part each time below and

  each time it leans down, at the lower ends

  of the upper tube sections, with suitable conventional scaffolding elements, on the ground and may, in

  these lower support regions, use the sample tubes

  standard scaffolding or scaffolding frames with longitu-

  dinales, transverses and diagonals and compensating elements

  height to compensate for uneven ground.

  Thus, one of the seat supports already has a natural support necessary for connection to the support. The other seat support, for the second row of seats to be provided for each lateral cheek, is preferably formed such that in the central region there is provided a seat support projecting upwards from the upper horizontal beam. Thus, one of the seat supports is each provided above the ground support, while the other seat support of each cheek element is provided in the middle, above the cheek element suitably designed. The arrangement described here provides for two rows of seats, each with two rows of walking boards and two seats per cheek element. We can of course also provide for each row

  a corresponding cheek piece or for three and possible-

  ment, in the case of a suitably stable construction, even for four rows. However, the constitution for two rows at the same time appears to be the most advantageous solution from the point of view of the size, the use of material,

of manufacturing and assembly.

  The seat supports advantageously have engagement elements for at least one bench. These can be in the form of upright pins, in the form of perforations for the engagement of pins or claws, but also in the form of slots, folds, crampons, etc .: If we want to give supports end of the benches another constitution than with intermediate supports, one can provide different seat supports for the support of a

  bench or for the joint support of two benches. Advantageous-

  ment, we will choose the double support and, possibly, we will suitably cover the seat support part

  remaining free in the terminal region.

  We can manufacture the cheek part, with its different components, according to different technologies, for example, at least in part, starting from shaped elements without removal of shavings, possibly forgings or parts formed from high quality cast iron. However, given the general use of semi-finished products in the scaffolding construction technique, it appears particularly advantageous that the sections of tube, the

  seat supports, horizontal beams and the green element

  bonding tical are formed of pieces of semi-finished product

  steel and are welded together. With auto devices

  materials and suitable machining technologies, we can

  advantageously manufacture the cheek parts. We can before-

  carefully weld the pipe sections on the front side, in front of the horizontal beams. In the organization for two rows

  of seats, the upper tube section has advantageous-

  a length which corresponds to two steps of the horizontal beams

  zontales intended for step boards or seat supports and the two sections of tube advantageously terminate

  down in the same plane. They must then be equipped with

  Connection elements suitable for the scaffolding system, but do not require any additional parts per cheek element to compensate for height differences. In a particularly advantageous constitution to manufacture and which can be quickly assembled and disassembled,

  the two sections of tube are cut at the bottom smoothly.

  The upper tube section then has at the top a retaining and centering pin corresponding to the internal diameter. This is advantageous for scaffolding systems which have tubes simply slid over each other, with retaining and centering pins located

  internally at the place of the connection.

  For the central seat support, provision is then advantageously made in the central region of the part

  cheek, on the upper horizontal beam, a vertical tube

  seat support cal which is welded and the end of which

  upper has the seat support. We can then

  taggingly take advantage of this seat support tube to

  the connection of other elements. It is advantageous-

  the horizontal beams in the form of rectangular tube elements placed on edge on which are welded U-shaped profiles open at the top in the wings of which the crampons of the step boards can be hung. We can

  then simply insert additional subjugations

  against uplift, of the usual type, for subject- -

  shooting the walking boards. For additional stiffening

  shutter and connection of the railings, the

  seat support may have ledges placed trans-

  vertically on the cheeks for the connection of

  transverse roofs and / or balustrade bars, to be provided under the benches. Such cross braces can

  be made up of frames screwed to the edges or even diag-

  nales, etc. A grandstand also requires an ascent region with the corresponding constitution of steps, like a staircase. According to the slope of the platform and the depth

  of the walking board, we get in certain circumstances

  tances, in the ascent region, unfavorable access conditions. In the case of a 25 cm slope, for example, and a depth of walking boards of about 60 cm, unfavorable conditions would be obtained, in particular for mass meetings. Consequently, steps of the staircase are advantageously provided which are placed, supported and fixed in an appropriate manner at the appropriate places. In this

  effect, according to an advantageous embodiment, for the training

  Steps are provided, between the rows of seats, step parts which each have a step board element with supports and / or retaining arms reaching to neighboring support parts. According to one embodiment, the tread parts are designed in the form of intermediate tread parts which, with treadboards hooked by means of crampons, form the staircase and each rest by a support on a treadboard and are each equipped with two retaining arms reaching up to neighboring seat support tubes, with couplings which can be connected to these arms. A

  such a constitution requires the installation of couplings

  but on the other hand provides a particularly stable bond. Another, simpler embodiment, also giving in most cases greater operational safety and which can be mounted and dismantled more advantageously, provides for the staircase to be formed from alternately arranged walking boards, with crampons and parts of the staircase situated roughly in their plane, the parts of the staircase presenting

  cleats arranged on retaining arms and which engage

  gent in spaced entU profiles. The retaining arms must protrude from the actual access surface, alternately up and down, so that they

  fit snugly into the U-profiles and main-

  keep the access surface at an appropriate spacing. Such elements only need to be hung and can be fixedly connected to the U-profiles, with

  the usual subjugation against lifting.

  In the case of grandstands that do not go to the walls, special attention must also be given to the shape given to the balustrades because they have to absorb significant loads and must be absolutely safe. They must be made stable accordingly and be fixedly connected to the platform. For this purpose, it is advantageous to provide on the cheek portions of balustrade fixing perforations to which bars can be fixed.

  railing or additional railing elements.

  Especially for posterior balustrades and their fixing, special balustrade fixing elements are advantageously provided which have tube sections which can slide on retaining and centering pins and balustrade fixing flanges arranged on these tube sections, railing fixing perforations to be provided in the edges. We can then connect in a simple way and with a safe operation of the corresponding railing elements, built according to a conventional technique. Other details, features, advantages and aspects of load-bearing construction are also indicated by

  the description below, referring to the drawings.

  Exemplary embodiments of the invention are explained below with reference to the drawings, in which: FIG. 1 shows the schematic side elevation of a grandstand with eight rows of seats; Figure 2 is an elevational rear view of three sections of a platform according to Figure 1, the representation of the seats being provided, for reasons of clarity, only in the upper region; Figure 3 is an oblique view of a cheek part with treadboards and hanging benches as well as the neighboring connecting elements, in partial representation; Figure 4 shows the side elevation of an individual cheek part; Figure 5 shows the plan of a cheek part according to Figure 4; Figure 6 is a longitudinal sectional view through the middle of the cheek portion according to Figure 5, but on a larger scale; Figure 7 is an oblique view of a cheek part with neighboring elements in the region of a staircase, the benches and step boards located in front of the drawing plane being omitted for reasons of clarity and intermediate walking parts with supporting and retaining arms and couplings being provided; Figure 8 shows the elevation from the rear of an intermediate walking part of a first embodiment according to Figure 7; FIG. 9 represents the plane of the intermediate walking part according to FIGS. 7 and 8; FIG. 10 is an oblique view of a cheek part in the region of a staircase with raised step boards and step parts with spikes, the step boards and the seats situated in front of the drawing plane being omitted for reasons clarity; Figure 11 is an oblique view of the execution according to Figure 10, with representation of the staircase and step boards and benches located next to one of the sides of the staircase; Figure 12 shows the plan of a stair part of the second embodiment according to Figures 10 and 11; Figure 13 shows the side elevation of the stair part according to Figures 10 to 12, but on a larger scale, and Figure 14 shows the partial elevation from the front of a

  walking part according to Figures 10 to 13.

  Grandstand 20 is formed of a load-bearing construction 21 with seats 22 and step boards 23 as well as a

  balustrade 24. It can also have roofs.

  The grandstand is made up of multiple parts that can be easily assembled and disassembled. Also, for the climb

25 stairs are provided.

  The supporting construction 21 is formed by vertical uprights 27, horizontal crosspieces 28, diagonals 29, cheek portions 30 as well as feet 31 and intial pieces 32, fitted with threaded rods. All the elements,

  part of the cheek part 30, are part of the constituent elements

  usual features of a scaffolding system. The scaffolding system

  dage here chosen has a modular dimension Rl of 1572 mm in the horizontal. In the vertical is provided a modular dimension of 0.5 m. A large part of the uprights, horizontal crosspieces and diagonals can be taken from the usual scaffolding programs. Occasionally, different lengths or angles are required. We don't talk about it especially here since they are made up of

a classic technique.

  We install the basic frame of the building

  carrier 21 as in the case of a common general-purpose scaffolding known to the applicant. We must choose the highest point of the grandstand location and we start there, with feet 31 and initial pieces 32 adjustable in height as well as with horizontal crosspieces 28, to constitute the basic sections in the modular dimension. The initial pieces 32 and the uprights 27 have welded perforated discs 34 for the usual formation of knot elements with corresponding claws and keys. On these, the connection of

  horizontal cross members 28, diagonal members 29 and other elements

ment.

  As can be seen in FIGS. 1 and 2, suitably separated frames are installed having a lateral modular dimension R1 and a modular dimension in width R2 of 2.572 m, for example, and stair parts 25 to

  new with a modular dimension R1 of 1.572 m, conforming to

  lying in the state of the soil. On these, the cheek portions 30 are slid in a staggered manner, as can be seen by the

figure 1.

  The cheek parts are formed by two sections

  vertical tubes 40.1 and 40.2 which are spaced apart by the dimension

  modular module R1. These are round tubes having the same diameters and the same wall thicknesses as the uprights 27. Between the tube sections 40.1 and 40.2 are provided the horizontal beams 41.1 and 41.2. These are connected by

  through a central connecting element 42.

  The pipe sections 40.1 and 40.2 end

  below in common plane E. They are simply cut off.

  The tube sections 40.1 and 40.2 are welded on the front side in front of the horizontal beams 41.1 and 41.2,

  as shown in Figures 4 and 5. The horizontal beams

  tales are designed as hollow rectangular tubes placed on edge. As connecting elements, there are provided flat steel plates 42.1 and 42.2, placed on both sides, which are also welded. The horizontal beams 41.1 and 41.2 are arranged in a staggered fashion with a pitch S of 25 cm for example. There is thus obtained for all steps a staggering with the dimension S. This is the case both for the step boards 23 and for the seats 22 and all the other connected elements. Since here, according to an advantageous embodiment, the cheek portion 30 is provided for the support of two treadboards and two rows of seats, a dimension is obtained for the height H which is equal to twice the dimension S , which is therefore 0.5 m here. The section of tube added to the upper horizontal beam 41.2, called upper section of tube 40.2, therefore has a length H of 0.5 m. As noted, it is

  cut smoothly at the bottom. In its upper end

  re is inserted a retaining and centering pin 43 of the usual type. Cross pin holes can be provided. A small distance below the upper end, a conventional perforated disc 34 is slid and welded onto the upper tube section 40.2, so that here the

  knot connection as can be seen from the drawings.

  On the horizontal beams 41.1 and 41.2 are

  welded U-profiles 44.1 and 44.2 open upwards.

  As shown by the drawings, these engage the crampons 23.1 of the step boards 23, in the usual manner in scaffolding. An uplift restraint can be inserted in the usual manner and be secured through the uplift securing perforation 33. However, the uplift attachment is not shown, given the smallness of the drawing. The width of each step region is here, as a result of half the modular dimension minus a part

  of the width of the seat, so large that one can advantageously-

  insert two step boards 23 each time as you

can see it by the drawings.

  To support the seats 22 are provided

  seat supports 45. These are supported on tubes.

  The lower seat support 45.1 is welded to the lower tube section 40.1. It has a distance relative to the U-shaped section 44.1 which corresponds to the seat height obtained during interlocking. Thus, the lower section of tube 40.1 is used, on the one hand, for connection to another cheek portion 30, owing to the fact that it is slid in the usual way on the retaining and centering pin 43 or on an initial part. The central seat support 45.2 is supported on a seat support tube 46. This is welded, in the middle of the modular dimension R1, to the upper horizontal beam 41.2. The distance from the seat support 45.2 to

  U-shaped 44.2 is equal to that of the lower layout

  better. The seat supports 45 are here designed in the form of flat steel plates which are welded to the tubes in the longitudinal direction of the cheek. They have four pins 47 located in the corner regions and which serve as engagement elements for the benches 22. The benches have corresponding holes. We can also provide only two

  pins. Instead of pins, holes and other agency-

  Commitments may also be provided. As can be seen, the entire cheek portion is made up of pieces of semi-finished product welded together. Then, advantageously, it is hot dip galvanized. We can then insert into the supporting construction such cheek portions 30, in a desired number and they serve to support the step boards 23 and the seats 22. Here, there is shown, for example, benches which are formed of tubular frames on which are fixed seat plates, for example of wood or of woody materials. One can choose the usual structure of scaffolding frame panels. However, it is also possible to install simple wooden seat boards or provide other seat supports on which, for example, individual seats are fixed. Edges 48 can be welded to the lower tube sections 40.1 transversely to the plane of the cheek. To these, the balustrade bars 24 can be fixed. It is also possible, for firmer support of the balustrades and for better cohesion of the sides, provide transverse bracing in the form of frames under the seats, etc. Fixation perforations 49 serve

  to the firm connection of railings 24.

  For fixing the balustrade 24 in the

  posterior region is provided a fixing element of -

  balustrade 73 which is formed by a section of tube 73.1 and a balustrade fixing rim 73.2. The stretch of

  73.1 tube slides on the retaining and centering pin

  ge 43 of the cheek part 30 located at the very top. We screw

  then in a very simple and stable way the balustra-

  of 24, with corresponding screws, to the balustrade fixing perforation 72 of the cheek part 30 located at the very top and to the balustrade fixing perforations

  not shown of the railing fastening element 73.

  We then continue to mount the railing in the usual way

  in the technique of building railings.

  Thus, with elements predominantly known in the conventional technique of construction of scaffolding and having only to be adapted as to their length and their angles, and with the cheek portions 30, it can be constituted

  kill the entire supporting structure of a grandstand with a small number of rows and a reduced width or a very large number of rows and a large width. It suffices to provide support for every other section, seen in width, because the step boards 23 and the benches 22 allow each time to cross a section. In any case, it exists under all

  cheeks of the vertical uprights. Only the horizontal sleepers-

  tales and diagonals need only be provided in

every other half.

  We can also form the stair regions with

  corresponding step boards of appropriate length.

  These are also hooked to the cheek parts as described. You can optionally choose shorter stairs for the stairs. If you do not want the long slope which is rational for an advantageous sitting position and visibility, in the region of the staircase, or if the prescriptions require it, you can plan intermediate steps. We can put and fix these simply,

in multiple ways.

  For quick assembly, an intermediate step like that shown in figures 7

to 9 is particularly suitable.

  The intermediate step 50 has a step board element 51 which rests on tubes

  support 52 on the step board 23 located below.

  It has lateral support profiles 53 on the-

  which of the retaining arms 54 are welded projecting. These have horizontal parts 55 in front of the front sides of which are welded the usual couplings of scaffolding tubes 56, the arrangement being designed so that they each lead to the central support support tubes.

  seat 46 of a cheek portion 30 and are of suitable size.

  So, just put the intermediate step part

  and attach it to the two tube couplings dMtkchafau-

age 56.

  FIGS. 11 to 14 show another embodiment of a tread part 60 which is hooked, according to the general support of the treadboards, with crampons 23.1, in the U-profiles open upwards 44.1 and 44.2 of the cheek parts 30, alternating with usual walking boards 23, a walking part 60 each constituting a step S which represents half the height H.

  In this example of execution, an element of plan-

  step 61, having a perforated plate surface whose edges of the holes are curved upwards and downwards, is provided with appropriate additional elements. On the side of the treadboard part are fixed, for example welded, retaining arms 62. In the upper posterior region, two retaining arms 62.2 extend upwards, while in the lower anterior region, two retaining arms 62.1 extend downward. To each of these retaining arms is welded a crampon 23.1, the crampons being hooked in the U-shaped profiles, 44, spaced apart from the pitch S, as illustrated in FIGS. 10 and 11. Since the step board part 63 is manufactured in the manner of the usual walking boards with the same manufacturing apparatus, preferably a train of rollers, the external limitations of its profile are fixed. These are not sufficient, in height and width, for a complete crossing. As a result, in the anterior lower region is welded an angled crossing plate which extends downwards the vertical wall 65 of the longitudinal beam of the board part 63 and has a horizontal wing 66 as well as a limitation and reinforcement wing. 67 angled downwards, which are designed so that they complete the surface of the lower plane of the treadmill, as can be seen in FIG. 10. In the upper posterior region is welded a complementary bracket 68 which

  has a vertical fixing wing 69, a horizontal wing

  height 70 and a bent closing and reinforcing wing 71 which also complete - as can be seen in FIGS. 10 and 13 - the staircase surface, so that, on the other hand, it is possible to use step boards from mass production. In this example of execution, the

  connection with tube couplings is eliminated.

  It is also possible to secure these intermediate steps against lifting by usual fastenings in the U-profiles, which are applied over the studs. We thus obtain a constitution adapting to the usual system

  scaffolding, also for steps that can be manufactured

  easily and advantageously and above all can be

  put in place advantageously and again removed.

  As can be seen, all the parts can be assembled with each other by conventional interlocking and coupling and be detached. As a result, you can quickly assemble and disassemble the entire platform. We can plan it, calculate its dimensions and treat it according to the usual rules of statics and the rules of scaffolding construction. he

  is thus possible, with a small number of additional parts

  shutters specially constituted, as part of a usual scaffolding program, to quickly erect and dismantle grandstands and to store them in a protected state, as well as to possibly clean them by machine. The construction, with a simple structure, can be carried out, transported, assembled, dismantled and maintained advantageously and adapts easily

  to all conditions of grandeur, support and accommodation-

is lying.

Claims (17)

- CLAIMS -   1. Load-bearing construction (21) for stands (20) with seats (22), step boards (23), stairs (25), possibly balustrades (24) and possibly roofs, with vertical uprights (27) and with connecting elements and horizontal and diagonal carriers, characterized in that   the uprights (27), the connecting elements and horizontal carriers   zontals and diagonals are formed by scaffold uprights   dage (27) and / or scaffold frames, horizontal beams, horizontal sleepers (28), straight rods (29), couplings, or the like, of a conventional scaffold system, and in that for the staggered support of step boards (23) and seats (22), staggered cheek pieces (30) are provided, equipped with connection elements harmonized with the scaffolding system and in which the lower and upper connections of the supports as well as the horizontal spacings (Ri) of the supports correspond to the modular dimension (R1) of the scaffolding system.   2. Construction according to claim 1, characterized in that the cheek portion (30) has, between two vertical tube sections (40.1, 40.2), horizontal beams (41.1, 41.2) spaced apart in height according to the pitch (S) from the grandstand (20) and a vertical connecting element (42)   which connects them roughly in the middle.   3. Construction according to claim 2, characterized in that the lower tube section (40.1) attached to the lower horizontal beam (41.1) has a stud connection at the bottom and reaches up to a seat support (45.1) , and in that the upper tube section (40.2) adjoins the upper horizontal beam   (41.2) has an upright connection at the top and bottom.   4. Construction according to any one of   claims 1 to 3, characterized in that in the region   - - 35 central of the cheek part (30) is provided a seat support (45.2) projecting upwards above the   upper horizontal beam (41.2).   5. Construction according to any one of   Claims 1 to 4, characterized in that the supports   seats (45.1, 45.2) are fitted with engagement elements (47) for at least one bench (22).   6. Construction according to any one of   Claims 1 to 5, characterized in that the sections   of tube (40.1, 40.2, 46), the seat supports (45.1, 45.2), the horizontal beams (41.1, 41.2) and the connecting part (42) are formed of pieces of semi-finished product steel and welded together.   7. Construction according to any one of   Claims 1 to 6, characterized in that the sections   of tube (40.1, 40.2) are welded on the front side in front   the horizontal beams (41.1, 41.2).   8. Construction according to any one of   Claims 1 to 7, characterized in that the section   of upper tube (40.2) has a length (H) which corresponds to two steps (S) of the horizontal beams (41.1, 41.2) intended respectively for the step boards (23) and the seat supports (45.1, 45.2), and that the two sections of tube (40.1, 40.2) end at the bottom in the same plane (E).   9. Construction according to any one of   claims 1 to 8, characterized in that both   tube sections (40.1, 40.2) end at the bottom by being   smoothly cut, while the upper section of tube   Laughter (40.2) carries a retaining pin at the top   centering (43) corresponding to the internal diameter.   10. Construction according to any one of   Claims 1 to 9, characterized in that in the region   central part of the cheek part (30) is welded, on the upper horizontal beam, a vertical seat support tube (46) whose upper end has the support seat (45.2).   11. Construction according to any one of   Claims 1 to 10, characterized in that the beams   horizontal (41.1, 41.2) are designed as rectangular tubular elements placed on edge, on which are welded U-profiles open upwards (44.1, 44.2) in the wings of which can hang the   crampons (23.1) of step boards (23).   12. Construction according to any one of the res-   dications 1 to 11, characterized in that the seat support tubes (46) have flanges (48) placed transversely to the plane of the cheek for the connection of transverse braces and / or bars   balustrades (24), to be provided below the seats (22).   13. Construction according to any one of the res-   dications 1 to 12, characterized in that for the formation of stairs (25), between the rows of seats are provided tread portions (50, 60) which each have a tread element (51, 61) with supports (52) and / or retaining arms (54; 62.1, '62 .2) reaching up to neighboring beam parts.   14. Construction according to claim 13, character-   risée in that the tread parts are designed as intermediate tread parts (50) which, with treadboards (23) hung by crampons (23.1), form the staircase (25) and each rest by a support (support tube 52) on a step board (23) and are each equipped with two retaining arms (54), reaching up to neighboring seat support tubes (46)   and to which couplings (56) can be connected.   15. Construction according to claim 13, character-   laughing in that the staircase is formed of step boards (23) arranged alternately, with crampons situated roughly in their plane and of stair parts (60), the stair parts (60) having crampons ( 23.1)   arranged on retaining arms (62.1, 62.2) and which   lie in spaced U-shaped profiles (44).   16. Construction according to any one of the claims   cations 1 to 15, characterized in that the cheek parts (30) have railing fixing perforations (72).   17. Construction according to any one of the res-   dications 1 to 16, characterized in that railing fixing elements (73) are provided which are formed by sections of tube (73. 1) which can slide on retaining and centering pins (43) and balustrade fixing edges (73.2) arranged on these sections of   tube and having broom fixing perforations- trade.