EP0798419A1 - Accessible and/or practicable device - Google Patents

Abstract

The roadway is assembled from modular components made of extruded aluminium and profiled for load carrying. The sides of the roadway are fitted with handrails (3) mounted on supports (2) all of extruded aluminium. The roadway sections are constructed from sub-sections welded together into self supporting structures. The sections are joined by cross bolts through interlocking edge profiles, with the interlocking profiles comprising tooth shaped edges.

Description

The invention relates to a device that can be walked on and / or driven over, for example for bridging bridges in need of renovation or for bridging streets, from a walkable web that is connected to handrails via cross struts.

In many applications, footbridges that people can walk on are required today. Only by way of example should pedestrian crossings via streets be mentioned here, which, if they are only intended for a short time, are to be removed again. This often happens during construction work on the actual pedestrian crossings or when new underground tunnels are being built.

As a further example, the bridging of bridges in need of renovation should be pointed out, in which a footbridge that can be walked on by appropriate workers runs along under the bridge, but above on the Bridge is suspended. Such a bridge must not only be easy to assemble, but above all also mobile, since this bridge must be moved between two bridge pillars.

As mentioned above, these two examples are only intended to indicate the possible applications, they are not an exhaustive list. A disadvantage of all of these applications is that these walk-in and / or drive-over devices are usually made of steel elements and are therefore very heavy. Furthermore, the assembly is extremely complicated and takes a lot of time.

The present invention has for its object to provide a walk-in device of the above. Type to develop, which is relatively light in weight, easy to manufacture and very variable.

To solve this problem, the walkable web and / or the cross struts and / or the handrails consist of extruded aluminum profiles.

Extruded aluminum profiles have the advantage that they are considerably lighter than steel profiles, for example. This makes it possible, for example, to produce bridges of considerable length without the weight being too high.

Furthermore, it is possible to produce aluminum profiles in the extrusion process so that they have a very high rigidity. This means that such devices that can be walked on and / or driven over are just as safe in terms of safety as the devices made of steel.

A particular advantage of using extruded aluminum profiles is that such a device that can be walked on and driven over can be manufactured in an extremely variable manner. It is possible to manufacture the device in any length and width without additional complicated expenses having to be operated.

The corresponding aluminum profiles are folded together in their extruded length, joined and connected. It is then possible to cut a number of planks or cross struts from this structure from a plurality of extruded aluminum profiles. It is also possible that sections of the desired length are cut from an extruded profile and joined to form the planks or used as cross struts. This is an extremely inexpensive and fast manufacturing process and allows the production of planks and cross struts in any length and width.

It may be sufficient if the same structure made of corresponding extruded aluminum strips is used for planks and cross struts, but in practice fewer aluminum profiles should suffice for the cross struts than for the planks. In any case, at least one profile strip is provided, to which a hinge profile is connected on both sides. The hinge profiles have the function that any number of planks and cross struts can be coupled together to produce a walk-in device in the desired length.

In a simple embodiment, the hinge profiles of adjacent planks or cross struts are designed in such a way that they engage in a tooth-like manner. That is, protrude from a plank or a cross strut fork-like tabs between which tongues are inserted from the other plank or cross strut. The connection then preferably takes place via corresponding cross bars or cross bolts which are pushed into the tabs or tongues by corresponding eyes. It is then only necessary to secure these cross bars or cross bolts so that they do not accidentally slide out of sight.

In a simple exemplary embodiment, such a fuse can consist of corresponding screw bolts. However, bolts must again be secured so that they do not loosen unintentionally. For this reason, ring channels are preferably formed on both sides of a cross bar or a cross bolt, into which a clamping bracket similar to a snap ring is inserted. For example, this clamp can have opposing locking knobs, so that the clamp is virtually clipped into the ring channel.

In a further preferred embodiment, the planks and the cross struts are designed in such a way that they can be exposed to considerable side loads. For this it is necessary to support the cross struts on the planks in a spatially separated manner. For this reason, the hinge profile of a plank is enlarged, for example triangular. The articulation point of the cross struts is then no longer close to the plane of the planks, but spatially separated from it. Support strips or abutments are provided above and below the articulation point, against which the ends of the cross struts are pressed. This prevents the cross struts from buckling.

As mentioned above, the handrail also consists of an extruded aluminum profile. For example, this can be a U-shaped profile, in which case the handrail is simple is pushed over the ends of the cross struts and is also secured by means of the cross bolt.

In a particularly preferred exemplary embodiment, the handrail also serves to hold a cover by which the spaces between the cross struts are secured. The veneer can, for example, be a textile tarpaulin that can also be printed. As a result, this blind can also serve as an advertising medium. The facing preferably has an edge piping which can be inserted into a corresponding groove in the handrail. At the other end, the veneer is then fixed using another fastening element, for example an elastic band or the like. The veneer also provides security against the people who walk the device.

Since the handrail is also to be made from an extruded aluminum profile, this can consist of an outer tube from which angled strips protrude on both sides, which in turn is formed with a groove for receiving the edge piping. To connect successive handrail sections, an inner tube is provided which is inserted into the outer tube. Appropriate cross bolts can then be used to fix successive handrails over the inner tube.

In some cases there is also a desire to "house" a device that can be walked on and / or driven over. This can also be done in the modular system with the proposed cut extruded profiles. The cross bolt, which secures the handrail with respect to the cross struts, is extended, for example, so that further cross struts can be pushed onto the extension, which are oriented upwards. On the other hand, these cross struts are in turn connected by a corresponding handrail, a roofing membrane being laid over these opposite handrails.

To secure and to maintain a certain distance from this additional cross strut, a cross bar is provided which connects the opposing cross struts to one another and at the same time spaces them. Planks can also be placed on the crossbars, which if necessary can be walked on again.

The present invention creates a device that can be walked on and / or driven over, that is very easy to set up and remove, that can be varied in length as desired, and that has a relatively low weight with sufficient rigidity. The whole thing takes place in a modular system, with a few profiles being sufficient to produce a bridge or the like of the desired length.

• Figur 1 eine Seitenansicht einer erfindungsgemäßen begehbaren Vorrichtung;
• Figur 2 eine Draufsicht auf die Vorrichtung gemäß Figur 1;
• Figur 3 eine vergrößert dargestellte Seitenansicht einer erfindungsgemäßen Querstrebe;
• Figur 4 eine Draufsicht auf die Querstrebe gemäß Figur 3;
• Figur 5 einen vergrößert dargestellten Querschnitt durch einen Teil der begehbaren Vorrichtung gemäß Figur 1 entlang Linie V-V;
• Figur 6 einen Querschnitt durch einen Teil von Figur 5 entlang Linie VI-VI;
• Figur 7 eine Seitenansicht eines weiteren Bereiches des Handlaufes gemäß Figur 1;
• Figur 8 eine Draufsicht auf den Bereich des Handlaufes gemäß Figur 7;
• Figur 9 einen aufgebrochen und teilweise im Querschnitt dargestellten Ausschnitt aus der begehbaren Vorrichtung gemäß Figur 1 im Bereich der Verbindung von Querstreben mit einem Steg;
• Figur 10 einen vergrößert dargestellten Ausschnitt auf ein weiteres Ausführungsbeispiel einer Verbindungsmöglichkeit zwischen den einzelnen Elementen der begehbaren Vorrichtung gemäß Figur 1;
• Figur 11 einen Querschnitt durch Figur 10 entlang Linie XI-XI;
• Figur 12 eine Seitenansicht einer erfindungsgemäßen Planke für ein weiteres Ausführungsbeispiel einer begehbaren Vorrichtung;
• Figur 13 einen Querschnitt durch einen Teil der begehbaren Vorrichtung im Bereich der Verbindungsstelle von zwei Planken gemäß Figur 12;
• Figur 14 eine Draufsicht auf ein weiteres Ausführungsbeispiel einer Querstrebe;
• Figur 15 einen Ausschnitt aus einem Verbindungsbereich zweier Planken ähnlich Figur 13 mit festgelegten Querstreben;
• Figur 16 einen Querschnitt durch die Verbindungsstelle der Planken gemäß Figur 15 mit eingesetzen Querstreben;
• Figur 17 eine perspektivische Ansicht auf einen Teilbereich einer begehbaren Vorrichtung;
• Figur 18 eine perspektivische Ansicht eines weiteren Ausführungsbeispiels eines Handlaufs an Querstreben;
• Figur 19 eine Seitenansicht einer Verbindungsstelle mit einem weiteren Ausführungsbeispiel eines erfindungsgemäßen Handlaufs an Querstreben;
• Figur 20 eine schematische Darstellung eines weiteren Ausführungsbeispiels einer erfindungsgemäßen begehbaren Vorrichtung;
• Figur 21 eine schematische Darstellung eines weiteren Ausführungsbeispiels einer begehbaren Vorrichtung entsprechend Figur 1.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in

• Figure 1 is a side view of a walk-in device according to the invention;
• Figure 2 is a plan view of the device of Figure 1;
• FIG. 3 shows an enlarged side view of a cross strut according to the invention;
• FIG. 4 shows a top view of the cross strut according to FIG. 3;
• FIG. 5 shows an enlarged cross section through part of the walk-in device according to FIG. 1 along line VV;
• FIG. 6 shows a cross section through part of FIG. 5 along line VI-VI;
• FIG. 7 shows a side view of a further area of the handrail according to FIG. 1;
• FIG. 8 shows a plan view of the area of the handrail according to FIG. 7;
• FIG. 9 shows a section of the walk-in device according to FIG. 1 broken open and partially shown in cross section in the region of the connection of cross struts to a web;
• FIG. 10 shows an enlarged section of a further exemplary embodiment of a connection possibility between the individual elements of the walk-in device according to FIG. 1;
• FIG. 11 shows a cross section through FIG. 10 along line XI-XI;
• FIG. 12 shows a side view of a plank according to the invention for a further exemplary embodiment of a walk-in device;
• FIG. 13 shows a cross section through part of the walk-in device in the region of the connection point of two planks according to FIG. 12;
• FIG. 14 shows a plan view of a further exemplary embodiment of a cross strut;
• FIG. 15 shows a section of a connecting area between two planks similar to FIG. 13 with fixed cross struts;
• FIG. 16 shows a cross section through the connection point of the planks according to FIG. 15 with inserted cross struts;
• Figure 17 is a perspective view of a portion of a walk-in device;
• FIG. 18 shows a perspective view of a further exemplary embodiment of a handrail on cross struts;
• FIG. 19 shows a side view of a connection point with a further exemplary embodiment of a handrail according to the invention on cross struts;
• FIG. 20 shows a schematic illustration of a further exemplary embodiment of a walk-in device according to the invention;
• FIG. 21 shows a schematic illustration of a further exemplary embodiment of a walk-in device corresponding to FIG. 1.

A walk-in device according to the invention has, according to FIG. 1, a web 1 which is connected via cross struts 2 to handrails 3.1 and 3.2 on both sides. The web consists of individual planks 4, which are connected to one another in a hinge-like manner. In this way, a web 1 of any length can be produced. Each plank 4 in turn consists of a plurality of profile strips 5, which are made of aluminum in the extrusion process. For example, FIGS. 3 and 4 indicate how planks 4 of this type can be composed of profile strips 5. At the same time, however, it is also indicated in FIGS. 3 and 4 that the cross struts 2 can be produced in the same way.

It can be seen that each plank 4 or each cross strut 2 begins with a hinge profile 6 and ends with a hinge profile 7. In between there are various profile strips 5.1 and 5.2, which can be designed as desired. A sandwich-like structure is preferred, which gives the entire plank 4 or the cross strut 2 sufficient rigidity. On the surface of the profile strips 5 and the hinge profiles 6 and 7 there are ribs 8 which increase the slip resistance. The individual profile strips 5 are connected to one another and to the hinge profile 6 or 7 by corresponding weld seams 9.

In Figure 2 it can be seen that the hinge profiles 6 and 7 are designed so that successive hinge profiles 6 and 7 mesh with each other in a tooth-like manner. The connection is then made by a cross bar 10 shown in Figure 9, which is pushed through corresponding eyes 11 and 12 in the hinge profiles 6 and 7, respectively. The Securing the cross bar 10 on both sides can be done by means of a screw bolt 13 screwed in at the front with the interposition of a corresponding washer 14. Another possibility is described below.

As mentioned above, the cross struts 2 should also be composed of individual profiles 5, upper hinge profiles 7.1 and 7.2 of two interacting cross struts 2.1 and 2.2 being recognizable in FIG. The opposite hinge profile of each cross strut 2.1 or 2.2 is articulated to the cross bar 10, as indicated in FIG.

The connection of the two cooperating cross struts 2.1 and 2.2 together and with the handrail 3 takes place according to FIG. 5 via a further cross bolt 15, into which bolts 16 and 17 are screwed on both sides at the end with the interposition of washers 18 or clamping pieces 19. This results in an articulated fixing of the cross struts 2, but the zigzag arrangement of the entire walk-in device gives considerable stability.

It can be seen in FIGS. 7 and 8 that the handrail 3 is also composed of individual sections 20.1 and 20.2. In this case, between the sections 20.1 and 20.2, a joint 21 remains open, which is bridged by a strip 22, which is only fixed on the one section 20.1 by, for example, welding. The connection to the other section 20.2 takes place via a plug pin 23 which secures the two sections 20.1 and 20.2 against each other.

Instead of screw bolts 13, 16 or 17, another, easily detachable fixing of the corresponding cross bars 10 or cross bolts 15 can also take place, as is indicated in FIGS. 10 and 11. For this purpose, ring channels 23 are provided at the end in the cross bar 10 or cross pin 15 screwed into the snap ring-like clamping bracket 24 can be used. Each clamp 24 is horseshoe-shaped or U-shaped and has inwardly directed locking knobs 25.1 and 25.2, which engage behind the cross bar 10 or the cross pin 15. In this way, the fixing of the cross bar 10 or the cross pin 15 in the clamp 24 is secured. Additional securing can also be provided, for example, by a split pin, screw bolt or by a simple piece of wire which is threaded through two bores 26.1 and 26.2 of the clamping bracket 24 lying opposite one another, the two ends of the piece of wire being rotated together. In order that the clamping bracket 24 can be pushed more easily over the cross bar 10 or the cross bolt 15 in the region of the ring channel 23, ie so that the clamping bracket 24 opens more easily, a slight weakening 27 is provided in its apex area.

The walk-in device according to the invention is produced as follows:

Profile strips 5 and hinge profiles 6 and 7 are produced by extrusion. In order to form the planks 4, a number of profile strips 5 are connected to one another by welding, any type of toothing being able to take place here between the individual profile strips, such as tongue and groove connections or the like. However, the connection is generally always made via a Weld. However, the invention is not limited to this; if appropriate, the connection can also be made using a mechanical or chemical adhesive.

The hinge profiles are cut tooth-like, so that a good tooth-like or hinge-like connection can take place between the individual planks at a later time.

Since, as a rule, the extruded profiles have a considerable length, this method also produces a structure which is considerably longer than the width of a desired plank. However, this means that a plurality of planks can be cut off from such a structure.

If the planks 4 have a length that corresponds to that of the cross strut 2, a plurality of cross struts 2 can now be cut off in slices from the plank 4 in the longitudinal direction. It is important to ensure that the opposite hinge shapes alternate, as is shown in FIG. 4 and also in FIG. 2.

As a rule, however, the planks should have a greater length than the cross struts 2. It will therefore be advisable to produce the cross struts 2 from a number of own profile strips or hinge profiles. The production takes place in the same way as the production of the planks 4, but with a reduced number of profile strips.

Depending on the desired length of the web 1, planks are now connected to one another, a hinge profile 6 interacting with a hinge profile 7 of the following plank. The crossbar 10 is then pushed through the eyes 11 and 12. A cross strut 2 is pushed onto the crossbar 10 on both sides and secured by means of the screw bolt 13 or the clamping bracket 24.

On the other hand, the cross strut 2 is fixed to the handrail 3, with two adjacent cross struts 2.1 and 2.2 being connected here by means of the cross bolt 15 and the corresponding screw bolts 16, 17 or the clamping bracket 24.

As a rule, further cross struts between two plank ends should be necessary, as can be seen in FIG. 1. These cross struts can be fixed to the web 1 either by means of a short bolt or by means of a further cross bar which is inserted through the sandwich-like structure of the profile strips 5 and looks out of the profile strips 5 on both sides. This cross bar can then also be pushed onto two ends of adjacent cross struts, which in turn mesh with one another in a tooth-like manner. The securing takes place in turn via a screw bolt or the above. Clamp 24.

A further exemplary embodiment of a plank 4.1 is shown in FIG. Like the plank 4, the plank 4.1 is also produced from a plurality of profile strips 5.3 and 5.4. These profile strips 5 are preferably made of aluminum in the extrusion process, corresponding strips of the desired width being cut off from this extrusion profile.

While the profile strips 5.4 are designed as simple box profiles, hinge profiles 6.1 and 7.1 have their own shape, which primarily serves the strength or the lateral load-bearing capacity of the plank 4.1. The hinge profiles 6.1 and 7.1 are generally approximately triangular in shape, a support strip 28 being provided in the accessible plane of the plank 4, a sleeve section 29 below this support strip 28 and an abutment 30 underneath. The sleeve sections 29 protrude approximately half over the support strips 28 and the abutment 30, each hinge profile 6.1 or 7.1 having a plurality of staggered sleeve sections 29 which, when assembling the planks 4.1 with further planks 4.1, tooth-like with the sleeve sections arranged there work together. This is indicated in Figure 13, with the Connection of a hinge profile 6.1 with a hinge profile 7.1 of the adjacent plank through the sleeve sections 29 of the cross bar 10 is pushed. In the area of the connection with cross struts 31.1 and 31.2, the hinge profiles 6.1 and 7.1 have an incision 32 into which the cross struts 31.1 and 31.2 can be inserted, as shown in FIGS. 15 and 17. The cross struts 31.1 and 31.2 are then also drilled through by the crossbar 10 and thus connected to the planks 4.1.

The advantage of the lower arrangement of the crossbar 10 below the plane of the plank 4.1 and the triangular configuration of the hinge profiles 6.1 and 7.1 with the support strips 28 and abutment 30 is that the corresponding ends of the crossbeams 31.1 and 31.2 against these support strips 28 and abutment 30 can support, which can then absorb the corresponding forces when the cross struts 31.1 and 31.2 are subjected to a side load. This effectively prevents the cross struts 31 from buckling.

So that the cross struts 31.1 and 31.2 can cooperate with the abutments 30, as is indicated in FIG. 15, a corresponding lug 33 is formed on the corresponding cross strut 31.1 and 31.2, respectively, which presses on the abutment 30. A corresponding cross strut 31 of this type is shown in FIG. 14.

So that the crossbars 31.1 and 31.2 are also acted upon from the outside with a correspondingly distributed pressure, the crossbar 10 is pushed onto a U-shaped clamp 34 which presses with its legs away from the crossbar 10 onto the crossbars 31.1 and 31.2, respectively. A nut 35 is provided to fix the clamp 34.

Another exemplary embodiment of a handrail 3.1 is shown in FIGS. 18 and 19. This also consists of preferably extruded aluminum profile sections, an outer tube 36 being provided which has a corrugation 37 on its surface. This corrugation 37 improves the possibility of access.

Angular strips 38.1 and 38.2 protrude from the outer tube 36 at a distance, which overlap the cross struts 31.1 and 31.2 in the position of use. At each end, a groove 39.1 or 39.2 is formed at the end of each angle strip 38.1 or 38.2, which is used to accommodate an edge welt 40, as is described for FIG. 20.

The handrail 3.1 is connected to the two cross struts 31.1 and 31.2 via a cross bolt 15.1, which is secured by split pins 41.

Successive handrail sections 3.1 are preferably connected to one another by an inner tube 42 which is inserted into adjacent ends of outer tubes 36. Here, too, the inner tube 42 is secured by means of a securing bolt 43, which is secured with cotter pins.

FIG. 20 shows a walk-in device that is “enclosed”. Planks 4.1 can be seen, of which cross struts 31.1 and 31.2 protrude. The handrail 3.1 is placed on these cross struts 31.1 and 31.2. The fields between the cross struts are clad by a facing 44. The facing 44 preferably consists of a suitable textile material which has the edge piping 40 on the edge. This edge piping 40 is inserted into a groove 39 of the handrail 3.1. The lower end of the facing 44 is fixed in any way. For example, a rubber band 45 is conceivable, which has a corresponding hook in corresponding holes in the The bottom of the plank 4.1 engages. However, other possibilities are also conceivable here.

Pockets 46 are also provided to stiffen the facing 44, into which reinforcement strips (not shown in more detail) can be inserted.

For housing, the cross pin 15.1 is replaced by a cross bar 47, which projects a little way beyond the cross strut 31.1. Further cross struts 31.3 and 31.4 are pushed onto this crossbar 47 and fastened by means of spinets or the like. On these cross struts 31.3 and 31.4 another handrail 3.1 is placed, on which a roofing membrane 48 is fixed. This roofing membrane 48 extends from the handrail 3.1 to the opposite handrail 3.1 and is fixed there in any manner. This is preferably done via an elastic band or the like, not shown.

In order to improve the stability and in particular to secure the distance, a cross bar 49 is provided between the opposing cross struts 31.3 / 31.4, which at the same time replaces the cross bolt 15.1 connecting the handrails 3.1 with the cross struts 31.3 / 31.4.

In FIG. 21 it is indicated that lower struts 50 projecting downwards can also be provided. These sub-struts 50 are connected to the planks 4 or 4.1 via the cross bars 10. On the other hand, the sub-struts 50 can be connected to one another by handrail elements 3 / 3.1. This mirror-inverted arrangement to the cross braces 3/31 gives the entire device enormous strength and is particularly suitable for longer bridges.

It goes without saying that hinge profiles 6/7 at the beginning of a web 1 can be replaced by a corresponding drive-on profile which is wedge-shaped is. In this way, such a bridge can also be suitable for vehicles. Item number list 1 web 34 Bracket 67 2nd Cross struts 35 mother 68 3rd Handrail 36 Outer tube 69 4th plank 37 Corrugation 70 5 Profile strips 38 Angled stripes 71 6 Hinge profile 39 Groove 72 7 " 40 Edge piping 73 8th Ribs 41 Sapwood 74 9 Weld 42 Inner tube 75 10th Crossbar 43 Safety bolt 76 11 eye 44 Delusion 77 12th " 45 Elastic band 78 13 Bolts 46 bag 79 14 disc 47 Crossbar 15 Cross bolt 48 Roofing membrane 16 Bolts 49 Crossbar 17th " 50 Strive for it 18th disc 51 19th Clamp 52 20th section 53 21 Gap 54 22 strip 55 23 Ring channel 56 24th Clamp 57 25th Latches 58 26 drilling 59 27 weakening 60 28 Support strip 61 29 Sleeve section 62 30th Abutment 63 31 Cross strut 64 32 incision 65 33 Support nose 66

Claims (24)

Device that can be walked on and / or driven over, for example for bridging bridges in need of renovation or for bridging streets, from a walkable web (1) which is connected to handrails (3, 3.1) via cross struts (2, 31),
characterized,
that the walkable web (1) and / or the cross struts (2, 31) and / or the handrails (3, 3.1) consists of extruded aluminum profiles (5, 6, 7). Device according to claim 1, characterized in that the web (1) is composed of a plurality of planks (4, 4.1). Device according to claim 2, characterized in that the plank (4, 4.1) and / or the cross struts (2, 31) consists of at least one profile strip (5) to which a hinge profile (6, 7) is attached on both sides. connects. Device according to claim 3, characterized in that profile strips (5) and hinge profiles (6, 7) are connected to one another via weld seams (9). Device according to claim 4, characterized in that a plank (4) and / or a cross strut (2) is cut off from a long structure of extruded profile strips (5) and hinge profiles (6, 7). Device according to one of claims 3 to 5, characterized in that the hinge profiles (6, 7) Interlocking adjacent planks (4) or cross struts (2) tooth-like. Apparatus according to claim 6, characterized in that the hinge profiles (6, 7) have eyes (11, 12) through which a cross bar (10) or a cross bolt (15) is inserted for connection to adjacent hinge profiles (7, 6) . Device according to one of claims 3 to 5, characterized in that the hinge profiles (6.1, 7.1) are triangular, a support strip (28) in a plane of the plank (4.1), including a sleeve section (29) and below an abutment ( 30) is arranged. Apparatus according to claim 8, characterized in that the sleeve section (29) projects beyond the support strip (28) or the abutment (30). Apparatus according to claim 9, characterized in that the cross strut (31) is formed on a support lug (33). Device according to one of claims 8 to 10, characterized in that a cross bar (10) is pushed through adjacent sleeve section (29), on which clips (34) for fixing the cross struts (31) are pushed. Device according to claim 7 or 11, characterized in that the cross bar (10) or cross bolt (15) is / are secured on both sides by screw bolts (13, 16, 17). Apparatus according to claim 7 or 11, characterized in that an annular channel (23) is formed on both sides of the transverse rod (10) or transverse bolt (15) and a clamping bracket (24) is inserted into this. Apparatus according to claim 13, characterized in that the clamping bracket (24) is U-shaped and has locking knobs (25). Apparatus according to claim 14, characterized in that the clamping bracket (24) has bores (26) for receiving a fastening means. Device according to at least one of claims 1 to 15, characterized in that the handrail (3) is U-shaped and is fixed to the cross struts (2). Device according to at least one of claims 1 to 15, characterized in that the handrail (3.1) consists of an outer tube (36) from which two angle strips (38.1, 38.2) protrude. Apparatus according to claim 17, characterized in that a groove (39.1, 39.2) is formed on the end of the angular strip (38.1, 38). Device according to claim 18, characterized in that an edge piping (40) of a facing (44) can be inserted into the groove (39.1, 39.2). Device according to one of claims 17 to 19, characterized in that an inner tube (42) can be inserted into the outer tube (36). Apparatus according to claim 19, characterized in that the facing (44) has pockets (46) for receiving stiffening profiles. Device according to at least one of claims 1 to 21, characterized in that further transverse struts (31.3, 31.4) with lower cross struts (31.1, 31.2) Handrails (3.1) are connected, which serve to hold a roofing membrane (48). Apparatus according to claim 22, characterized in that the further cross struts (31.3, 31.4) are connected to one another via cross rods (49). Device according to at least one of claims 1 to 23, characterized in that the struts (50) project downward from the web (1).

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