EP0798419B1 - 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 walk-in device, For example, to bypass renovation Bridges or for bridging streets, from one walkable footbridge that crossbars with handrails is connected, wherein the walkable web and / or the Cross struts and / or the handrails made of extruded Aluminum profiles / s and the web of one Plurality of planks is composed and the Planks made of at least one transverse to the longitudinal direction of the There are web-running profile strips.

In many applications, webs are needed today that are accessible to people. Just for example, here Pedestrian crossings over streets that are mentioned especially if they are only planned for a short time, be removed again. This happens frequently during construction work on the actual pedestrian crossings or in the case of new subtunnels.

As another example, we want to stop bridges in need of renovation are pointed out at which a footbridge that can be walked on by appropriate workers, led under the bridge, but above on the Bridge is suspended. Such an interruption must not only be easy to assemble, but above all also mobile, as this bridging between two Bridge piers must be moved.

As mentioned above, these two examples are only meant to be suggest possible use cases, they do not represent any exhaustive list. Disadvantage of all these Use cases is that these walk-in devices mostly made of steel elements and therefore very are heavy. The assembly is also extraordinary complicated and takes a lot of time.

From GB 709 706 A a bridge is known in which the walk-on walkway from a variety of lengthways extruded aluminum profiles is composed. Adjacent aluminum profiles are in their length offset from each other.

The present invention has for its object a walk-in device of the above Kind of develop which is easy to manufacture and very variable.

To solve this task that leads to both sides the profile strip (s) is also extruded, across hinge profile running to the longitudinal direction of the web connects, with adjacent hinge profiles with Interlocking sleeve sections through which a cross bar which is also the cross struts with the planks combines.

Extruded aluminum profiles have the advantage that they in relation to steel profiles, for example are much lighter. It is possible for example, bridges of considerable length manufacture without the weight being too high.

It is also possible to extrude aluminum profiles so that they are very high Have rigidity. That means that walk-in devices are just as safe are classified as steel devices.

A particular advantage of using extruded Aluminum profiles are such device that can be walked on and driven over is extremely variable can be made. It is possible to put the device in manufacture any length and width without additionally complicated expenses are operated have to.

The corresponding aluminum profiles are in their extruded length folded, joined and connected with each other. Then it is possible from this Formed from a plurality of extruded Aluminum profiles each have a series of planks or Cut off cross braces. It is also possible that from one extruded profile sections of desired length cut off and assembled to the planks or as Cross braces can be used. This is extraordinary inexpensive and fast manufacturing process and allows the production of planks and cross struts in any length and width.

It may be sufficient if that for planks and cross struts same structures from corresponding extruded Aluminum strip is used, however, should be in the Practice for the cross struts of fewer aluminum profiles sufficient than for the planks. In any case, however provided at least one profile strip to which a hinge profile connects on both sides. The Hinge profiles have the function that any Number of planks and cross struts can be coupled together can to create a walk-in device in the desired Length.

The hinge profiles of adjacent planks or cross struts are like this designed that they interlock tooth-like. that is, protrude from a plank or a cross strut fork-like tabs, between the respective tongues of the other plank or cross strut. The Connection is made via appropriate Cross bars or cross bolts, which by appropriate eyes in the tabs or tongues. Then it has to only a backup of these cross bars or cross bolts done so they don't accidentally get out of sight slide.

In a simple embodiment, such Fuse consist of appropriate bolts. However, bolts must again be secured, so that they don’t accidentally come off. Therefore be preferably a cross bar or a cross pin on both sides each have ring channels molded into which a clamping bracket similar to a snap ring. For example can this clamping bracket opposing locking knobs have, so that the clamp virtually in the ring channel is clipped in.

In a further preferred embodiment, the Planks and the cross struts designed so that they can be exposed to significant side loads. For this it is necessary to fix the cross struts to the planks support spatially separate. That's why this is here Hinge profile of a plank enlarged, for example triangular. The articulation point of the cross struts is then no longer near the plane of the planks but spatially separated from it. Above and below the Support strips or abutments are provided, against which the ends of the cross struts are pressed become. This will cause the cross struts to buckle avoided.

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

In a particularly preferred embodiment the handrail is also used to hold a veneer which secure the spaces between the cross braces. The veneer can be, for example, a trade textile tarpaulin, which is also printable. hereby this blind can also serve as an advertising medium. The veneer preferably has an edge piping which is in a corresponding groove of the handrail can be inserted. On the other hand, the blindness becomes another Fastening element, for example an elastic band or the like. established. The veneer also offers security towards the people who commit the device.

Because the handrail is made of an extruded aluminum profile should be produced, this can be made from one Outer tube consist of the angular stripes on both sides cantilever, which in turn the groove for receiving the edge piping is molded. To connect successive An inner tube is provided for handrail sections is inserted into the outer tube. By appropriate Cross bolts can then be successive over the inner tube Handrails can be set.

In some cases, there is also a desire to inspect / or "housing" passable device. This too can in the modular system with the proposed cut extruded profiles happen. The Cross bolt, which is the handrail opposite the cross braces saves, is extended, for example, so that on the Extension further cross struts can be pushed on that are oriented upwards. Be different these cross struts in turn by a corresponding Handrail connected, being opposite each other over this Handrails are placed on a roofing membrane.

To secure and maintain a certain distance this additional cross strut is a cross bar provided which the opposite cross struts connects and spaced at the same time. On the Crossbars can also be placed on planks, which may if desired, can be walked on again.

The present invention creates a pedigree / or drivable device that is very light is to be set up and removed again in its Length can be varied arbitrarily and the one relative has low weight with sufficient rigidity. The whole happens in a modular system, with few Profiles are sufficient to build 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;

Figure 3 is 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 area 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 Figure 1 on a web 1, the cross struts 2 with handrails 3.1 and 3.2 are connected on both sides. there the web consists of individual planks 4, which are hinge-like are interconnected. In this way, a Bridge 1 of any length can be made. Each plank 4 again consists of a plurality of profile strips 5, which are extruded from aluminum. For example, it is indicated in FIGS. 3 and 4 how such planks 4 composed of profile strips 5 could be. But it is also in the Figures 3 and 4 indicated that in the same way the Cross struts 2 can be produced.

It can be seen that each plank 4 or each cross strut 2 with a hinge profile 6 begins and with a Hinge profile 7 ends. In between there are various Profile strips 5.1 and 5.2, which can be designed in any way can. A sandwich-like structure is preferred, which the entire plank 4 or the cross strut 2 is sufficient Stiffness there. On the surface of the profile strips 5 or the hinge profiles 6 and 7 are ribs 8, which increase the slip resistance. The single ones Profile strips 5 are with each other and with the hinge profile 6 or 7 by means of corresponding weld seams 9 connected.

It can be seen in FIG. 2 that the hinge profiles 6 and 7 are designed so that successive hinge profiles 6 or 7 intermesh tooth-like. The connection is then carried out by a crossbar shown in Figure 9 10, the corresponding eyes 11 and 12 in the Hinge profiles 6 and 7 is pushed through. The securing the crossbar 10 on both sides can be done by means of a screwed in at the front 13 under Intermediate layer of a corresponding disc 14 happen. Another possibility is described below.

As mentioned above, the cross struts 2 should also be made individual profiles 5 can be assembled, wherein in FIG. 6 upper hinge profiles 7.1 and 7.2 of two interacting Cross struts 2.1 and 2.2 are recognizable. The opposite hinge profile of each cross strut 2.1 or 2.2 is with the crossbar 10, as indicated in Figure 9, articulated.

The connection of the two cooperating cross struts 2.1 and 2.2 together and with the handrail 3 takes place according to the figure 5 via a further cross bolt 15, in both sides at the front bolts 16 and 17 with an intermediate layer of discs 18 or clamps 19 are screwed in. This results in an articulated fixing of the cross struts 2, however, the zigzag arrangement of the whole gives walkable device considerable stability.

In Figures 7 and 8 it can be seen that the handrail 3 composed of individual sections 20.1 and 20.2 is. There remains between sections 20.1 and 20.2 a joint 21 open, which is bridged by a strip 22, which only on one section 20.1 for example welding is set. The connection with the other section 20.2 takes place via a plug pin 23, which the two sections 20.1 and 20.2 against each other guaranteed.

Instead of bolts 13, 16 or 17, a other, easily solvable definition of the corresponding Cross bars 10 and cross bolts 15 take place, as in the Figures 10 and 11 is indicated. These are at the end in the cross bar 10 or cross pin 15 ring channels 23 screwed into the snap ring-like clamp 24 can be used. Each clamp 24 is horseshoe-like or Shaped in a U shape and has inward-facing locking knobs 25.1 and 25.2, which the crossbar 10 and the Reach behind the cross bolt 15. This will fix it the cross bar 10 or the cross pin 15 in the clamping bracket 24 secured. An additional backup can still for example with a cotter pin, screw bolt or but done by a simple piece of wire, which by two opposite bores 26.1 and 26.2 of the Clamping bracket 24 is threaded, the two ends of the Wire piece are twisted together. So that Clamp 24 easier over the cross bar 10 or Cross bolt 15 are pushed in the region of the ring channel 23 can, i.e. in order that the clamping bracket 24 opens more easily, is a slight weakening in its apex 27 provided.

The production of the walk-in according to the invention The device happens as follows:

In the extrusion process, profile strips 5 and Hinge profiles 6 and 7 made. To form the Planks 4 become a number of profile strips 5 connected by welding, here between the individual profile strips any toothing can take place, such as tongue and groove connections od. Like .. However, the connection takes place in the Usually always with a weld. But that's what Invention not limited; where appropriate, the Connection also via a mechanical or chemical Adhesives are made.

The hinge profiles are cut tooth-like, so that between the individual planks to a later one Time a good tooth-like or hinge-like Connection can take place.

As a rule, the extruded profiles are considerable This method also results in a length Formed manufactured, which is much longer than that Width of a desired plank is. But that means that a plurality of planks of such a structure can be cut off.

If the planks 4 have a length that that the cross strut 2 corresponds to a plank 4 in slices a plurality of cross struts 2 in Be cut lengthways. It is about make sure that the opposite ones Alternate hinge shapes, as shown in Figure 4 or is also illustrated in Figure 2.

As a rule, however, the planks should be of greater length have than the cross struts 2. Therefore, it will be as turn out to be advisable to make the cross struts 2 out of a number of to produce your own profile strips or hinge profiles. The production takes place in the same way as that Production of the planks 4, but with a reduced one Number of profile strips.

Depending on the desired length of the web 1 are now Planks joined together, each with a hinge profile 6 with a hinge profile 7 of the following Plank interacts. Then the crossbar 10 by the Eyes 11 and 12 pushed. On both sides the cross bar is 10 each a cross strut 2 pushed and by means of Bolt 13 or the clamp 24 secured.

On the other hand, the cross strut 2 on the handrail 3 fixed, whereby here a connection of two neighboring Cross struts 2.1 and 2.2 by means of the cross bolt 15 and the corresponding bolts 16, 17 and the Clamping bracket 24 takes place.

As a rule, further cross struts between each two plank ends may be necessary, as shown in FIG. 1 is recognizable. The definition of these cross struts on the Web 1 can either be made using a short bolt or but over another crossbar that is sandwiched by the Structure of the profile strip 5 is inserted and looks out of the profile strips 5 on both sides. Also this crossbar can then have two ends of adjacent ones Cross struts, which in turn mesh like teeth, be postponed. The backup is again done via a bolt or the above Clamp 24.

In Figure 12 is another embodiment Plank 4.1 shown. Like the plank 4, the plank is also 4.1 from a plurality of profile strips 5.3 and 5.4 manufactured. These profile strips 5 are preferably in the Extrusion process made of aluminum, wherein corresponding strips of the desired width from this Extruded profile can be cut off.

While the profile strips 5.4 as simple box profiles are formed, hinge profiles 6.1 and 7.1 have a own shape, above all the strength or the Side load capacity of the plank 4.1 is used. The Hinge profiles 6.1 and 7.1 are overall in their contour approximately triangular, with in the walk-in level Plank 4 a support strip 28, below this Support strip 28 a sleeve portion 29 and below Abutment 30 is provided. Here are the Sleeve sections 29 about half over the support strips 28 and the abutment 30, each Hinge profile 6.1 or 7.1 a plurality of offset arranged sleeve sections 29 are provided, which at Assembling the planks 4.1 with other planks 4.1 tooth-like with sleeve sections arranged there interact. This is indicated in Figure 13, with the Connection of a hinge profile 6.1 with a Hinge profile 7.1 of the neighboring plank through the Sleeve sections 29 of the cross bar 10 is pushed. in the Area of connection with cross struts 31.1 or 31.2 hinge profiles 6.1 and 7.1 have a notch 32, in which the cross struts 31.1 and 31.2 are used can, as shown in Figures 15 and 17. The Cross struts 31.1 and 31.2 are then also from the Cross bar 10 pierced and so with the planks 4.1 connected.

The advantage of the lower arrangement of the cross bar 10 below the plane of plank 4.1 and the triangular design of the hinge profiles 6.1 and 7.1 with the support strips 28 and abutment 30 lies in that the corresponding ends of the cross struts 31.1 and 31.2 against these support strips 28 and abutments 30 can support, which then with a side load Cross struts 31.1 and 31.2 the corresponding forces can intercept. The cross struts 31 will buckle effectively prevented.

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

So that the crossbars 31.1 and 31.2 also from the outside accordingly distributed pressure is applied Crossbar 10 a U-shaped bracket 34 pushed on with their legs away from the crossbar 10 on the crossbars Press 31.1 or 31.2. To set the bracket 34 a nut 35 is provided.

There is another one above all in FIGS. 18 and 19 Embodiment of a handrail 3.1 shown. This also consists of preferably extruded aluminum profile sections, an outer tube 36 is provided, which has a corrugation 37 on its surface. This Ribbing 37 improves the possibility of access.

Angle strips 38.1 project from the outer tube 36 at a distance and 38.2, which, in the position of use, the cross struts 31.1 and 31.2 overlap. Each angle strip is always at the end 38.1 or 38.2 a groove 39.1 or 39.2 is formed, which is used to accommodate an edge piping 40, like this Figure 20 is described.

A connection of the handrail 3.1 with the two Cross struts 31.1 and 31.2 are made using a cross bolt 15.1, which is secured by split pins 41.

Successive handrail sections 3.1 are preferred connected by an inner tube 42, which in adjacent ends of outer tubes 36 is inserted. Also here the inner tube 42 is secured via a Locking bolt 43, which is secured with cotter pins.

A walk-in device is shown in FIG is "housed". Planks 4.1 are recognizable, of which Apply cross braces 31.1 and 31.2. This cross strut 31.1 and 31.2 the handrail 3.1 is attached. A disguise the fields between the cross struts are made by a Facing 44. Facing 44 preferably consists of a suitable textile material, the edge of the Edge piping 40 has. This edge piping 40 is in a groove 39 of the handrail 3.1 inserted. The lower end of the Facing 44 is set in any way. Conceivable is, for example, an elastic band 45, which has a corresponding hooks in corresponding holes in the The bottom of the plank 4.1 engages. However, here too other possibilities conceivable.

Pockets 46 are also provided to stiffen the cover 44 provided, in the reinforcing strips, not shown can be inserted.

The cross bolt 15.1 is by a crossbar for encasing 47 replaced, a bit over the cross strut 31.1 protrudes. On this cross bar 47 are further cross struts 31.3 and 31.4 postponed and by spints or the like. attached. On these cross struts 31.3 and 31.4 is a another handrail 3.1 placed on which a roofing membrane 48 fixed. This roofing membrane 48 extends from the Handrail 3.1 to the opposite handrail 3.1 and is set there in any way. Prefers this happens again via a not shown Elastic band or the like ..

To improve stability and in particular Securing the distance is between the opposing ones Cross struts 31.3 / 31.4 a cross rod 49 is provided, which at the same time on the handrails 3.1 with the Cross struts 31.3 / 31.4 connecting cross bolts 15.1 replaced.

In FIG. 21 it is indicated that protruding downwards Struts 50 can be provided. The connection this struts 50 with the planks 4 and 4.1 over the crossbars 10. On the other hand, the lower struts 50 be connected to each other by handrail elements 3 / 3.1. This mirror-image 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. In this way, such a bridge can also be suitable for vehicles. Position Number List 1 web 34 clip 67 2 crossbars 35 mother 68 3 handrail 36 outer tube 69 4 plank 37 knurl 70 5 profile strips 38 angle strips 71 6 hinge profile 39 groove 72 7 40 Randkeder 73 8th ribs 41 cotter 74 9 Weld 42 inner tube 75 10 cross bar 43 safety bolt 76 11 eye 44 facing 77 12 " 45 elasticated 78 13 bolt 46 bag 79 14 disc 47 cross bar 15 cross bolt 48 roofing membrane 16 bolt 49 crossbar 17 " 50 under pursuit 18 disc 51 19 clamp 52 20 section 53 21 Gap 54 22 strip 55 23 annular channel 56 24 clamp 57 25 Rest knobs 58 26 drilling 59 27 weakening 60 28 support strips 61 29 sleeve section 62 30 abutment 63 31 crossmember 64 32 incision 65 33 support lug 66

Claims (15)

1. Apparatus which can be walked-on, for example for passing under bridges which are in need of restoration or for spanning roads, said apparatus being formed from a walkway (1), which is connected to handrails (3) via transverse struts (2), the walkway (1) and/or the transverse struts (2, 31) and/or the handrails (3, 3.1) comprising extruded aluminium profiles (5, 6, 7), and the walkway (1) being composed of a plurality of planks (4, 4.1), and the planks (4, 4.1) comprising at least one profile strip (5), which extends transversely relative to the longitudinal direction of the walkway (1), characterised in that an equally extruded hinge profile (6, 7), which extends transversely relative to the longitudinal direction of the walkway (1), communicates with the profile strip(s) (5) on both sides, adjacent hinge profiles (6, 7) engaging in one another with sleeve portions (29), through which is inserted a transverse bar (10), which also connects the transverse struts (2, 2.1, 2.2, 31.1, 31.2) to the planks (4).
2. Apparatus according to claim 1, characterised in that one plank (4) and/or one transverse strut (2) are/is cut out from a long structure of extruded and interconnected profile strips (5) and hinge profiles (6, 7).
3. Apparatus according to claim 1 or 2, characterised in that the hinge profiles (6.1, 7.1) have a triangular configuration, a supporting strip (28), thereunder a sleeve portion (29) and thereunder an abutment (30) being disposed in a raised portion of the plank (4.1).
4. Apparatus according to claim 3, characterised in that the sleeve portion (29) protrudes beyond the supporting strip (28) or respectively the abutment (30).
5. Apparatus according to claim 4, characterised in that a supporting projection (33) is provided on the transverse strut (31).
6. Apparatus according to one of claims 3 to 5, characterised in that a transverse bar (10) is pushed through adjacent sleeve portions (29), over which portions clamps (34) are slid to secure the transverse struts (31).
7. Apparatus according to at least one of claims 1 to 6, characterised in that the handrail (3) has a U-shaped configuration and is secured on the transverse struts (2).
8. Apparatus according to at least one of claims 1 to 6, characterised in that the handrail (3.1) comprises an outer tube (36), from which two angular strips (38.1, 38.2) protrude.
9. Apparatus according to claim 8, characterised in that a groove (39.1, 39.2) is provided at the end of the angular strip (38.1, 38).
10. Apparatus according to claim 9, characterised in that an edge beading (40) for a facing (44) is insertable into the groove (39.1, 39.2).
11. Apparatus according to one of claims 8 to 10, characterised in that an inner tube (42) is insertable into the outer tube (36).
12. Apparatus according to claim 10, characterised in that the facing (44) has pockets (46) to accommodate reinforcing profiles.
13. Apparatus according to at least one of claims 1 to 12, characterised in that, together with lower transverse struts (31.1, 31.2), additional transverse struts (31.3, 31.4) are connected to handrails (3.1), which serve as the retaining means for a roofing cover (48).
14. Apparatus according to claim 13, characterised in that the additional transverse struts (31.3, 31.4) are interconnected via transverse rods (49).
15. Apparatus according to at least one of claims 1 to 14, characterised in that lower struts (50) protrude downwardly in front of the walkway (1).

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