EP2602402A2 - Dismountable facade scaffold - Google Patents

Abstract

The scaffold has vertical beams (20) which consist of U-shaped scaffolding elements (8a-8c), L-shaped scaffolding elements or T-shaped scaffolding elements, and the closed vertical frames (3a-3c) are combined. The T-shaped scaffolding elements include the crossbars for supporting bottom elements (7a,7b) and an articulation of rail braces (9a,9b). The rail braces is mounted on the working plane (15) of articulation during assembly of T-shaped scaffolding element. The L-shaped scaffolding elements include the crossbars to upper side of bottom elements in a newly formed work plane. An independent claim is included for method for establishing detachable facade scaffold.

Description

The invention relates to a dismountable facade scaffolding of a facade scaffold.

From the prior art demountable facade scaffolds are known, such. B. the facade scaffold plettac SL 70 ALTRAD company plettac assco GmbH - Plettenberg, the facade scaffold from lateral frame elements, connecting struts such. B. diagonal struts or railing and / or knee straps and inserted in the base frame bottom elements is formed. The lateral frame elements, also known as vertical frames, are preferably designed as closed frame elements. To protect people, the facade scaffolding is secured in the working levels with a railing strut, which is mounted from this level when constructing a new working level. This holds until the completion of scaffolding assembly the risk of crashes. To construct a working plane, the lateral vertical frames are preferably designed as closed frame elements, have a railing strut mounted thereon and are used as additional components for a safety-relevant construction of a subsequent working plane. Such a framework construction is associated with a considerable effort.

For this reason, the invention has set itself the task of proposing a collapsible facade scaffold, which improves the flexibility and safety in construction.

The object is achieved on the basis of the aforementioned prior art, by the features of claim 1 and by the features of claim 2 and 10.

The measures mentioned in the dependent claims advantageous embodiments and further developments of the invention are given.

• ● Einen Grundrahmen in der Grundebene aus mindestens zwei parallel zueinander angeordneten geschlossenen Vertikalrahmen;
• ● Am Grundrahmen angeordnete, vorzugsweise höheneinstellbare Fußstützen;
• ● Mindestens eine Diagonalstrebe und eine horizontale Verbindungsstrebe am Grundrahmen;
• ● Ein im oberen Endbereich des Grundrahmens angeordnetes Bodenelement zur Bildung der ersten Arbeitsebene;
• ● Mindestens eine auf der zur Fassadenfläche abgewandten Gerüstseite angeordneten Geländerstrebe, vorzugsweise ab der ersten Arbeitsebene, wobei
  • die Bestandteile der Vertikalträger aus unterschiedlichen Gerüstelementen gebildet sind, welche eine U-, L- oder T-Form aufweisen und im Wesentlichen zu geschlossenen Vertikalrahmen kombinierbar sind,
  • das T-förmige Gerüstelement einen Querriegel zur
  • Aufnahme von Bodenelementen und mindestens eine Anlenkung für eine Geländerstrebe aufweist und die Geländerstrebe der nächst folgenden Arbeitsebene an der Anlenkung bei der Montage des T-förmigen Gerüstelements anbringbar ist,
  • das L-förmige Gerüstelement einen Querriegel zur obenseitigen Sicherung der Bodenelemente in einer neu gebildeten Arbeitsebene umfasst.

Accordingly, a dismountable facade scaffold extends over a ground plane and at least one working plane, which are arranged between two lateral vertical beams, wherein the facade scaffold comprises the following scaffolding elements:

• ● A base frame in the ground plane consisting of at least two closed vertical frames arranged parallel to each other;
• ● Footrests arranged on the base frame, preferably adjustable in height;
• ● At least one diagonal strut and one horizontal connecting strut on the base frame;
• ● A bottom element arranged in the upper end region of the base frame for forming the first working plane;
• ● At least one on the side facing away from the facade surface frame side railing strut, preferably from the first working level, wherein
  • the components of the vertical support are formed from different structural elements which have a U, L or T shape and can be combined substantially to form closed vertical frames,
  • the T-shaped scaffolding element a crossbar for
  • Containing soil elements and at least one linkage for a railing strut and the Railing strut of the next following working plane can be attached to the linkage during assembly of the T-shaped scaffold element,
  • the L-shaped scaffolding element comprises a cross bar for securing the floor elements in a newly formed working plane on top.

The advantage over the known from the prior art facade scaffolding is a structure of the facade scaffold with improved safety without additional components. The "leading" railing strut is mounted in the normal framework construction and requires no additional installation effort.

In addition, with regard to the weight of the scaffolding elements to be used, facilitated handling when constructing working planes due to the U, T and L-shaped scaffolding elements of the lateral vertical beams of the facade scaffolding is made possible.

In addition, the construction of a subsequent working level with respect to the safety aspect of an advancing railing strut with a reduced weight of the necessary scaffolding elements executable.

Furthermore, the U-, T- and L-shaped scaffold elements have smaller dimensions and a lower weight, whereby the transport and the construction of the scaffolding elements for a facade scaffolding is facilitated.

In a further aspect of the invention, it is provided that the base frame in the ground plane is already constructed by U-shaped, and T-shaped scaffolding elements. The advantage of this aspect according to the invention is that the entire facade scaffold can be built by means of U, T and L-shaped scaffolding elements, whereby the closed vertical frame, which has a relatively high own weight, is completely eliminated. However, it is not intended that the closed vertical frame to be replaced exclusively by the U-, T- and L-shaped frame elements. Depending on the design of the façade framework and its load, the use of closed vertical frames can certainly be used at least as a base frame or support frame.

In a preferred embodiment of the invention, it is provided that the U-shaped framework element is present only once per vertical support. As a vertical frame is that vertically extending scaffolding frame assembly to see, which distributes distributed over the working levels, the support areas of the floor coverings. The U-shaped scaffolding element is used only once in the construction of a vertical frame or a base frame, wherein in the following the construction of further working planes with the T- or L-shaped scaffold element takes place alternately. The advantage is that only two different scaffolding elements are necessary to build all subsequent working levels to form the lateral vertical frame.

In a further preferred embodiment of the invention it is provided that the railing strut is attached to a subsequent working level prior to their formation of the following level starting from an existing work plane on the vertical frame to be formed, in particular on the T-shaped scaffolding element. By attaching the railing strut before forming a subsequent working level, the newly formed working level is secured against their commission. A person who enters the newly formed working level is thus secured by the existing railing strut against accidental falling off of the facade scaffolding.

A further preferred embodiment of the invention provides that the vertical frame of each further working plane above the base frame of a T-shaped and an L-shaped frame member are formed alternately. Thus, all further to be formed vertical frame of the working levels are formed by only two different scaffolding elements, whereby more scaffolding elements not or at most as an end required are.

Moreover, it is provided in a further embodiment of the invention that the U-shaped framework element has two mutually parallel vertical stems of different lengths, which are connected together at one end with a cross bar. The different lengths of the mutually parallel vertical stems of a U-shaped framework element form an offset, which is inverted by a subsequent T-element (arranged rotated by 90 °). As a result, a construction position is formed, which allows the construction of further working levels by T and L-shaped scaffolding elements.

Moreover, it is provided in a preferred embodiment of the invention that the T-shaped scaffolding element comprises a vertical handle and a support crossbar, wherein the crossbar is preferably connected to half of the length of the vertical stem with this. When mounted in the scaffolding system, the T-shaped scaffold element is placed in position by 90 ° rotated T's. The support cross bar serves to support floor elements, wherein the arrangement of the cross bar is adapted to the T-shaped scaffolding element to the vertical stem of the U- or L-shaped scaffolding element on the facade side.

Moreover, it is provided in a further embodiment of the invention that the L-shaped scaffold element comprises a vertical handle and a arranged at the end of the crossbar, wherein the crossbar is designed as a floor covering-Sicherungsquerriegel. After placing floor elements on the crossbar of the T-shaped scaffold element, the L-shaped scaffolding element is attached to the vertical stem of the previous U's or L's

Furthermore, a further embodiment of the invention is provided that the bottom elements rests in its edge region on the receiving crossbar of the T-shaped scaffold element and the securing crossbar of the L-shaped scaffold element is covered. Covering a resting on a support cross bar of a T-shaped scaffold element floor element by a Sicherungsquerriegel an L-shaped scaffold element secures the floor elements against accidental lifting upwards.

A further aspect of the invention provides a method for constructing a dismountable facade scaffold, the method steps of which are applicable to the embodiments of the invention. The individual method steps are adapted to the embodiments according to the invention, whereby a safe and fast construction of a facade scaffold according to the invention is made possible.

Embodiments and exemplary embodiments are illustrated in the drawings and are explained in more detail below with reference to the figures, indicating further advantages.

Fig. 1

einen aus dem Stand der Technik bekannten Grundrahmen in der Grundebene;

Fig. 2

die Bildung einer zweiten Arbeitsebene mittels eines U-förmigen Gerüstelementes;

Fig. 3

eine in der Arbeitsebene angeordnete Geländerstrebe und Kniestrebe;

Fig. 4

ein in der Arbeitsebene angeordnetes, T-förmiges Gerüstelement;

Fig. 5

eine am T-förmigen Gerüstelement angeordnete Gerüststrebe für eine nachfolgende Arbeitsebene;

Fig. 6

eine mit der Gerüststrebe verbundenes T-förmiges Gerüstelement im aufgesteckten Zustand;

Fig. 7

ein Fassadengerüst mit einer zweiten gebildeten Arbeitsebene;

Fig. 8

die Bildung einer dritten Arbeitsebene und Belagsicherung des Bodenelements mittels einem L-förmigen Gerüstelementes;

Fig. 9

ein Fassadengerüst mit zwei Arbeitsebenen und aufgestecktem T-förmigen Gerüstelement;

Fig. 10

ein fertig montiertes Fassadengerüst mit drei Arbeitsebenen und entsprechenden Geländerstreben;

Fig. 11

eine Anordnung von U-, T- und L-förmigen Gerüstelementen zur Bildung eines Vertikalträgers;

In detail show:

Fig. 1

a known from the prior art base frame in the ground plane;

Fig. 2

the formation of a second working plane by means of a U-shaped framework element;

Fig. 3

a railing strut and knee brace arranged in the working plane;

Fig. 4

a T-shaped scaffolding element arranged in the working plane;

Fig. 5

a scaffold strut arranged on the T-shaped scaffolding element for a subsequent working plane;

Fig. 6

a connected to the framework strut T-shaped scaffolding element in the plugged state;

Fig. 7

a facade scaffolding with a second formed working plane;

Fig. 8

the formation of a third working level and securing the floor element by means of an L-shaped scaffold element;

Fig. 9

a facade scaffolding with two working levels and attached T-shaped scaffold element;

Fig. 10

a prefabricated facade scaffolding with three working levels and corresponding railing struts;

Fig. 11

an arrangement of U, T and L-shaped scaffolding elements to form a vertical support;

In Fig. 1 a facade scaffold 1 is shown, which comprises a base frame 2, which is formed from two closed vertical frame 3a and 3b, wherein the vertical frame 3a and 3b are placed in parallel to each other and are connected to each other by means of a connecting strut 4 and a diagonal strut 5a. The arrangement of connecting strut 4 together with the diagonal strut 5a in a scaffold plane improves the stability of the facade scaffold 1 and is repeated in scaffolding superstructures with working levels> about four to five working levels. The base frame 2 has on the side facing the bottom surface footrests 12, which allow height adjustment of the base frame 2 for adaptation to the ground. In the upper corner region of the base frame 2, a bottom element 7a is arranged, which forms a tread for a person in the subsequent level. The base frame 2 of the facade scaffold 1 can be arbitrarily extended in its length by the arrangement of a further vertical frame 3c and another bottom element 7b. The vertical frames 3a, 3b and 3c together with any subsequent scaffolding elements arranged thereon form in the same vertical plane Vertical support 20 for the facade scaffold 1 off.

In Fig. 2 is a basic frame according to Fig. 1 shown, wherein a U-shaped frame member 8a, 8b and 8c is fitted from above on the vertical frame 3a, 3b and 3c, which includes a U-shaped frame member-containing cross bar 21a, 21b and 21c above the vertical frame 3a, 3b and 3c arranged floor elements 7a and 7b covered in the edge region. Due to the transverse bar 21a, 21b and 21c, an undesired lifting out of a bottom element 7a, 7b and 7c is prevented. The U-shaped frame element 8a, 8b and 8c has two vertical stems of different lengths, which form an offset of the vertical stems for a subsequent frame element.

In Fig. 3 is a basic frame according to Fig. 1 shown, wherein on the U-shaped frame elements 8a, 8b and 8c on the vertical handle with a short length, a railing strut 9a, 9b and a parallel extending knee brace 10 is attached. The railing strut 9a, 9b, together with the knee brace 10, provide protection for a person moving on the first working plane 15 from falling off the facade scaffold 1.

In FIG. 4 is a basic frame according to FIG. 1 shown, wherein arranged in the first working plane 15 U-shaped frame member 8a, 8b and 8c is supplemented by attaching a T-shaped frame member 11a. The T-shaped framework element 11a preferably has on the half-length of the vertical stem to a cross bar, which is designed as a support cross bar 13a for supporting a further bottom element. The cross bar 13a is here hooked on the long handle of the U-shaped element 8a and thereby forms a stable frame construction.

In FIG. 5 is a facade scaffold 1 with a base frame 2 according to FIG. 1 shown, which plugged in the first working plane 15 on the U-shaped frame member 8a, 8b and 8c T-shaped scaffolding element 11a in the upper region of the vertical stem is connected to a first end of a railing strut 9c. The railing strut 9c has for this purpose an eyelet or the like, with which it can be hung on the vertical handle.

In FIG. 6 is a facade scaffold 1 with a ground plane 2 after FIG. 1 shown, wherein in the first working plane 15, another T-shaped frame member 11b is connected to the second end of the railing strut 9b and is attached to the U-shaped frame member 8b. Before mounting the second T's the railing strut is also hooked to this. Due to the rotatable mounting of the fastening means of the railing strut, for example by attaching the eyelet to a dedicated pin, the strut can be placed in the region of the not yet existing working plane during assembly of the T ', so that it leads the plane. The arranged on the T-shaped scaffolding elements 11a and 11b support crossbars 13a and 13b form a support for a bottom element 7.

In FIG. 7 is a facade scaffold 1 with a base frame 2 according to FIG. 1 shown, wherein in the upper end portion of the U-shaped and T-shaped frame members 8 and 11 formed vertical frame 22a, 22b and 22c, a bottom member 7c, 7d to form a second working plane 17 is arranged.

The second working plane 17 is secured by the prior arrangement of a railing strut 9c, 9d out of the first working plane 15 out.

In FIG. 8 is a facade scaffold 1 with a base frame 2 according to FIG. 1 shown, wherein for forming a further working plane in the vertical course of the vertical frame 22a, 22b and 22c, an L-shaped frame member 14a, 14b and 14c is arranged. The L-shaped scaffold element 14a, 14b, 14c has at a first end a transverse bar, which is designed as a floor covering securing cross bar 23a, 23b, 23c. The L is plugged with its vertical stem on the vertical stem of the previous scaffolding element, and hung with the cross bar on holding means provided for this purpose. In this way, a stable frame construction is formed. The floor covering securing crossbars 23a, 23b, 23c prevents an unintentional lifting of an arranged floor element 7c, 7d in the facade scaffold 1.

In FIG. 9 is a facade scaffold 1 with a base frame 2 according to FIG. 1 shown, wherein on the L-shaped scaffold element 14d in the second working plane 17, another T-shaped scaffold element 11d is attached to the support cross bar arranged thereon 13d. The construction of a further working plane with the associated T and L-shaped frame elements 11, 14 is analogous to those described above FIGS. 5 to 8 , In which now by the offset of the vertical stalks of L and T, the respectively required offset for a leading railing is generated.

In FIG. 10 is a facade scaffold 1 with a base frame 2 according to FIG. 1 shown, wherein the scaffold elements 14g, 14h and 14i are arranged such that their vertical stems are arranged on the side facing away from the facade side scaffolding side. The floor covering securing crossbars 23d, 23e and 23f likewise cover the inserted floor element 7e and 7f.

In FIG. 11 a vertical beam 20 of a facade scaffold 1 is shown, wherein the lateral vertical frame 22a, 22b of individual scaffolding elements 8a, 11a, 14a, 11b and 14b are formed. In this case, the vertical frame 22a is formed in the ground plane 16 of a U-shaped frame member 8a, which is composed of two vertical stems with an intermediate lower crossbar 21 therebetween. The U-shaped frame element 8a forms due to different lengths of the two vertical stems 24a, 24b from an offset, which is compensated by a downstream T-shaped frame member 11a. The T-shaped framework element 11a preferably has halfway along its vertical stem 25a on a support cross bar 13a for supporting a bottom element 7. It can do that T-shaped scaffold element 11a on the support crossbar 13a upwardly directed pins which engage in the bottom element 7 or reach through this. Due to the superposition of the support crossbar 13a of the T-shaped scaffold element 11a and the floor covering-locking crossbar 23a of the L-shaped scaffold element 14a, an inserted bottom element is covered and secured against unintentional lifting. The vertical frame 22b of the first working plane 15 is closed by the arrangement of another T-shaped scaffold element 11b, wherein before attaching the T-shaped scaffold element 11b to the previous T-shaped scaffold element 11a, a first end is connected to a railing strut 9. As a result, an anticipatory arrangement of a railing strut 9 is formed for a further working plane to be formed, starting from the preceding working plane. The following working levels 17 are performed by a mutual arrangement of further T-shaped scaffolding elements 11 and L-shaped scaffolding elements 14.

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other. All information and features disclosed in the documents, including the abstract, in particular the spatial design shown in the drawing, are claimed as essential to the invention, as far as they are new individually or in combination with respect to the prior art.

LIST OF REFERENCE NUMBERS

1

facade scaffolding

2

base frame

3a-3c

vertical frame

4

connecting strut

5a-5c

diagonal strut

6

Crossbar (vertical frame)

7a-7f

floor element

8a-8c

U-shaped scaffolding element

9a-9f

railing strut

10

knee brace

11a-11f

T-shaped scaffolding element

12

footrests

13a-13d

Support crossbar (T-shaped framework element)

14a-14f

L-shaped scaffolding element

15

first working level

16

ground plane

17

second working level

18

not used

19

third working level

20

vertical support

21

Cross bar (U-shaped scaffolding element)

22a-22d

Vertical frame (made up of scaffolding elements)

23a-23f

Flooring safety crossbar (L-shaped framework element)

24a-24b

Vertical handle (U-shaped frame element)

25a-25b

Vertical handle (T-shaped frame element)

26a-26c

Vertical handle (L-shaped frame element)

Claims (10)

Dismountable facade scaffold (1), which extends over a ground plane (16) and at least one working plane (15), and these are arranged between lateral vertical beams (20), wherein the facade scaffold (1) comprises the following scaffolding elements: - A base frame (2) in the ground plane (16) of two mutually parallel closed vertical frame (3a, 3b, 3c); - On the base frame (2) arranged, preferably height adjustable footrests (12); - At least one diagonal strut (5a, 5b, 5c) and a horizontal connecting strut (4) on the base frame (2); - A in the upper end region of the base frame (2) arranged bottom element (7a-7f) for forming the first working plane (15); at least one railing strut (9a-9f) arranged on the framework side facing away from the facade surface, in which - The components of the vertical support (20) are formed of different scaffolding elements, which have a U-shape ((8a-8c), L-shape (14a-14f) or T-shape (11a-11f) and substantially closed vertical frame (3a, 3b, 3c) can be combined; - The T-shaped scaffolding element (11a-11f) has a cross bar (13a-13d) for supporting a bottom element (7a-7f) and a linkage for a railing strut (9a-9f) and the railing strut (9a-9f) of the following working plane (15) attachable to the linkage during assembly of the T-shaped scaffold element (11a-11f); - The L-shaped frame member (14a-14f) comprises a cross bar (23a-23f) for securing the top of the bottom element (7a-7f) in a newly formed working plane (15, 17, 19). Dismountable facade scaffold (1), which extends over a ground plane (16) and at least one working plane (15) extends, and these are arranged between lateral vertical beams (20), wherein the facade scaffold (1) comprises the following scaffolding elements: a base frame (2) in the ground plane (16); - On the base frame (2) arranged, preferably height adjustable footrests (12); - At least one diagonal strut (5a-5c) and a horizontal connecting strut (4) on the base frame (2); - A in the upper end region of the base frame (2) arranged bottom element (7a-7f) for forming the first working plane (15); at least one railing strut (9a-9f) arranged on the framework side facing away from the facade; in which - The components of the vertical support (20) are formed of different scaffolding elements, which have a U-shape (8a-8c), L-shape (14a-14f) or T-shape (11a-11f) and substantially closed vertical frame ( 3a-3c) can be combined; - A U-shaped scaffold element (8a-8c) in the ground plane (16) is arranged and by means of an offset of the vertical stems (24a, 24b) and a T-shaped scaffold element (11a-11c) forms a base frame (2); - The T-shaped scaffolding element (11a-11f) has a cross bar (13a-13d) for supporting a bottom element (7a-7f) and a linkage for a railing strut (9a-9f) and the railing strut (9a-9f) of the following working plane (17) attachable to the linkage during assembly of the T-shaped scaffold element (11a-11f); - The L-shaped frame member (14a-14f) comprises a cross bar (23a-23f) for securing the top of the bottom element (7a-7f) in a newly formed working plane 17, 19). The dismountable facade scaffold (1) according to claim 1 or 2, characterized in that the U-shaped scaffolding element (8a, 8b, 8c) is present only once per vertical beam (20). Folding facade scaffold (1) according to one of the preceding claims, characterized in that the railing strut (9a-9f) of a following working plane (15, 17, 19) prior to their formation from an existing working plane on the vertical frame to be formed (3a, 3b, 3c ), in particular on the T-shaped scaffold element (11a-11f) is attached. Dismountable facade scaffold (1) according to one of the preceding claims, characterized in that the vertical frames (3a, 3b, 3c) of each further working plane (15, 17, 19) above the base frame (2) of a T-shaped (11a-11f) and an L-shaped skeleton member (14a-14f) are alternately formed. Collapsible facade scaffold (1) according to one of the preceding claims, characterized in that the U-shaped scaffolding element (8a, 8b, 8c) has two mutually parallel vertical stems (24a, 24b) of different lengths, which at one end with a cross bar (21 ) are interconnected. The dismountable facade scaffold (1) according to one of the preceding claims, characterized in that the T-shaped scaffolding element (11a-11f) comprises a vertical post (25a, 25b) and a support cross bar (13a-13d), the cross bar (13a-13d) preferably at half the length of the vertical stem (25a, 25b) is connected thereto. The dismountable facade scaffold (1) according to any one of the preceding claims, characterized in that the L-shaped scaffold element (14a-14f) comprises a vertical handle (26a-26c) and a transverse bolt arranged at the end thereof, the transverse bolt acting as a floor-covering safety catch (23a -23f) is formed. Dismountable facade scaffold (1) according to one of the preceding claims, characterized in that the bottom element (7a-7f) in its edge region on the Support crossbar (13a-13d) of the T-shaped scaffold element (11a-11f) rests and of the Sicherungsquerriegel (23a-23f) of the L-shaped scaffold element (14a-14f) is covered. Method for constructing a dismountable facade scaffold (1) according to one or more of Claims 1 to 9, characterized by the following method steps: a. Mounting of at least two, closed base frame (2) of U-shaped (8a, 8b, 8c) and T-shaped scaffolding elements (11a-11f) or of closed formed vertical frame (3a, 3b, 3c) and parallel installation of the base frame (2 ) to each other in a ground plane (16); b. Mounting a diagonal strut (5a-5c) and a horizontal connecting strut (4) between the base frames (2) in the ground plane (16); c. Inserting a bottom element (7a-7f) in the upper end region of the base frame (2); d. preferably mounting a U-shaped scaffold element (8a, 8b, 8c) on a closed base frame (2) and mounting a first T-shaped scaffold element (11a) for generating a vertical post offset; e. Mounting an L-shaped scaffolding elements (14a-14f) for securing the floor element and inverting the vertical post offset; f. Mounting the first T-shaped framework element; G. Hooking the railing strut (9a-9f) to this framework element from the working plane; H. Hooking the opposite sides of the railing strut (9a-9f) to an unmounted T-shaped scaffolding element (11a-11f). i. Mounting the T-shaped scaffold element (11a-11f) together with the railing strut (9a-9f); j. Placing a base plate (7a-7f) on the transverse bars (13a-13f) of the T-shaped scaffolding elements (11a-11f) to form a further working plane (15); k. Preferably mounting a knee brace (10) below the railing strut (9a-9f) on mounting means to the Vertical stems (25a, 25b) of the T-shaped scaffolding elements (11a-11f); l. Mounting L-shaped scaffolding elements (14a-14f) and securing the bottom plate (7a-7d) by the securing crossbars (23a-23f); m. Repeating the method steps f to 1 for setting up further working levels (17, 19).

Images