EP3015624B1

EP3015624B1 - Side railing for a shoring tower

Info

Publication number: EP3015624B1
Application number: EP15191570.9A
Authority: EP
Inventors: Michael Becker
Original assignee: Huennebeck GmbH
Current assignee: Huennebeck Deutschland GmbH
Priority date: 2014-10-31
Filing date: 2015-10-27
Publication date: 2018-03-14
Anticipated expiration: 2035-10-27
Also published as: DE102014222247A1; NO2688526T3; DK3015624T3; PL3015624T3; EP3015624A1

Description

The invention concerns a side railing for a shoring tower, which can be used for fabrication or reconstruction of buildings, as well as an assembly method.
Shoring towers can be used depending on design and load bearing capacity as working or protection scaffold for providing a work platform for workers for example at buildings as well as load-bearing scaffold or support frame for shoring beams for building a variable supporting structure for buildings, bridges or other constructions.
A side railing serves the falls protection of people and is therefore an important safety measure of operational safety of shoring towers. At the same time, a side railing can support high mechanic stability. The document FR2939464A1 shows in figure 1 a shoring tower, where vertical bars and cross struts have been partly replaced by a side railing (figure 2).
A shoring tower is constructed by levels with equal or similar linkage arrangement of substantially interconnected rods, struts, sticks and/or pipe profiles and commonly has a many times bigger height than lengths respectively width. At the same time, a shoring tower is exposed to high cross forces of wind flows. An inhomogeneous load can additionally induce bending moments. Very high stiffness and strength of connections between two levels of a shoring tower is therefore essential for stability and operational safety.
The documents FR2879638A1 and FR2939464A1 disclose solutions for connecting the vertical bars of side railings of two shoring tower levels being arranged above each other, where a sleeve with a cut is pushed over a pipe profile with a protuberance. By means of form-fit between the protuberance and the cut, a fixation is enabled. The shoring tower can thereby obtain sufficient stability over the height.
The document EP2706166A1 discloses all the features of the preamble of claim 1. It is further referred to the following documents, which also disclose side railings for a shoring tower, EP2757210A1 , GB2353558A and EP1272717A1 .
It is an objective of the invention to provide a further developed side railing for a shoring tower as well as a method.
As solution for the problem serves a side railing according to claim 1 as well as a method according to claim 12. Preferred embodiments result from the dependent claims.
As solution serves a side railing for a shoring tower, which can be used for fabrication or reconstruction of buildings, with three connection points to adjacent shoring tower members. A first connection point is a block guide being arranged at a first end of a vertical bar. A second connection point is a claw being arranged at a second end of the vertical bar, wherein the claw is connectable with an identically constructed block guide of an adjacent shoring tower member, which is particularly arranged above or below the side railing.
A block guide is a construction element or an apparatus, by which a restricted guidance along an intended motion path of a connecting part is defined.
Claw means a construction element with the shape of a claw, i.e. a construction element with one or more protruding arms, which have at least at one point (area) in longitudinal direction a curvature (turning) for encompassing a connecting part. A sleeve with a cut or a pipe profile with lateral protuberance do not have a claw shape within the meaning of the present application.
A vertical bar is in an assembled, operational condition oriented in direction of the force of gravity and commonly has a circular profile (cross section). But also other profile shapes in cross sectional view are possible.
Connection point means an intended and detachable connection or interface between two adjacent members. The term comprises for example a loose end stop as well as a firm screw connection. A connection point can also be formed by a connection means.
Through providing a claw-block-guide-connection for two connection points at the ends of a vertical bar, a very high wear resistance, long life span and high safety against unintended detaching of the connection can be enabled.
Furthermore, a very effective side protection respectively advancing side protection can be enabled. A labor intensive securing against failing down for assembly operators can thereby be omitted. A claw-block-guide-connection further allows very effectively avoiding lifting out of a side railing, which is not yet connected to an upwards adjacent shoring tower member and/or only hold by the claw-block-guide-connection.
At the same time, a side railing with a claw-block-guide-connection can be assembled very easily and fast.
According to the invention, the block guide is formed by two radial ledges having different lengths.
A radial ledge is a ledge (web) or protrusion, which extends from the vertical bar in radial direction, thus substantially or exactly in a right angle to the vertical bar. Length refers to the extension (dimension) in radial direction.
By having a radial ledge being longer than the other, the connection of claw and block guide itself can restrict in connected condition a degree of freedom of motion in a very simple way, particularly the degree of freedom of rotation in one direction. A very effective side protection against swiveling of the side railing towards outside can be obtained after connection and a very high operational safety respectively safety in regard to falls can be achieved.
At the same time, a high stability of the connection while saving material and weight of the side railing is enabled.
Additionally, a very easy and fast putting on and connecting of the side railing can be achieved. Putting on and connecting from different angular positions can be also enabled by this way, which allows especially at multi bar towers a very flexible and simple assembly.
Furthermore, a side railing having a block guide being formed only by two radial ledges with different length can be provided with very little production expenses.
In one preferable embodiment, the claw is configured such that it overlaps in a tight-fitting manner the block guide and the adjacent shoring tower member in connected condition over an overlap length in vertical direction, wherein the overlap length particularly corresponds to at most 3 times, preferably 2,5 times, preferred at most 2 times a block guide thickness (strength).
Block guide thickness is the extension (dimension) of the block guide in vertical direction.
Tight-fitting means that there is only a little play respectively a small gap between two members that are pushed over each other or in each other, which allows a guided motion but not tilting. Guided motion allows maintaining stability of a connection. Tilting however leads to instability or failure of a connection.
As the claw and the block guide with corresponding vertical bars in connected condition are overlapping in a tight-fitting manner by particularly less than three times, preferably 2,5 times, preferred at most 2 times the block guide thickness in vertical direction, a side railing can be assembled very easily and fast and is connected very robustly at the same time.
When for example a sleeve at an end of a vertical bar is put over another vertical bar, then an additional lifting and maneuvering of the side railing by the length of the sleeve is necessary, until both vertical bars are aligned in axis (axially parallel) and the sleeve can be guided over the other vertical bar while maintaining the axial alignment. From the everyday life, said assembly procedure is comparable with for example inserting a parasol umbrella in a pipe support of a parasol umbrella stand. Due to the high weight of the side railing of commonly 10 to 20 kg and more, the longer holding and alignment and eventually insertion of the side railing during assembly requires a high effort of the assembly operators. Furthermore, such threading procedure does take comparatively long time.
But at this embodiment of a side railing, a sleeve shape was omitted, so that a freely putting of the claw on the block guide is enabled also under an angle towards the vertical bar axis. For connecting, the side railing is finally only to be turned (pivoted) about a contact point as swivel (pivot point), until the claw falls into the block guide. No additional lifting is necessary like with an above described sleeve connection particularly when providing a claw, which is formed by tow radial ledges with different lengths. An assembly is thus very easy.
A further advantage of this embodiment is that due to the low overlap length respectively overlapping the claw and block guide can be provided with a higher material thickness without having to apply significant more or less material compared to the sleeve solution. With the sleeve solution, comparatively much material is already bound by the bigger overlap area of the pipe profile. An increase of the sleeve sheet thickness would increase the weight of the side railing significantly due to the bigger curved surface area of the sleeve. In contrast to that, the claw and block guide can be dimensioned significantly thicker thanks to the comparatively little surface without the use of an excessively high amount of additional material. Therewith, high wear resistance and long life span can be achieved.
The expert knows the general, technical correlation that a reduction of overlap respectively overlapping length at a connection with two vertical bars leads to a weakening of the connection in terms of bending strength. For this reason, the expert will favor a sleeve shape similar like in the teaching of FR2879638A1 und FR2939464A1 .
However, the insight was gained that by means of a third connection point of the railing, a sufficient stability of two over each other connected levels of a shoring tower can be achieved also without a higher overlap of the claw of the side railing with the block guide of the adjacent shoring tower element. A thicker dimensioning of the claw and the block guide can thus directly result in a very high wear resistance and long life span.
According to the invention, the block guide has a ring shape. In particular, the block guide is a one piece.
A one piece means made of one piece of material. Ring shape refers to an about a vertical bar closed surrounding part shape, which not necessarily has a round inner contour or outer contour in a cross section.
A one piece block guide and/or a ring shape enable a high strength and safety against failure as well as a reduced number of parts and material saving, whereby a side railing can be provided with reduced production expense.
In one embodiment, the block guide is connected to the vertical bar by means of a material-fit (bonded) connection. Hereby, very low production expense can be achieved.
In one preferable embodiment, the first end of the vertical bar (2) sticks out of the block guide (3) in vertical direction by at most 1,4 cm, preferably at most 1 cm, preferred at most 0,7 cm.
Due to the comparatively low distance between the end of the vertical bar and the block guide, a side railing can be provided with very low material expenditure and weight.
In one embodiment, the inner contour of the claw is adapted to an sticking out, first end of a vertical bar for a tight-fitting receiving.
Herewith, very high stability of the connection between two levels of a shoring tower can be achieved.
In one preferable embodiment, a first radial ledge is wider than a second radial ledge, particularly at least by 1,5 times, preferably 2 times, preferred by 2,5 times.
Width of a radial ledge means the extension of the outer contour in circumferential direction. As the first radial ledge is wider than the second radial ledge, a very simple and fast assembly of the side railing can be achieved.
In one embodiment, a radial ledge has a radian measure at the outer contour of at least 5 degree (radian measure), preferably 10 degree (radian measure), preferred 15 degree (radian measure), and/or at most 45 degree (radian measure), preferably 30 degree (radian measure). Hereby, a very high stability of the connection and long life span of the side railing can be achieved.
According to the invention, a guiding notch of the claw allows encompassing a first radial ledge of the block guide for a tight-fitting guiding. In particular, a guiding notch of the claw with two, preferably three guiding notch surfaces can be guided in a tight-fitting manner along a first radial ledge of the block guide.
By means of such a guiding notch, a very high stability of the connection between two levels of the shoring tower can be achieved. A lifting up of a side railing, which has been not yet connected to an upwards adjacent shoring tower member and/or is only hold by means of the claw-block-guide-connection, can thereby be very effectively counteracted.
According to the invention, the claw has a hook with guiding notch and/or at least two, preferably three, preferred four hooks and/or exactly four hooks each with a guiding notch.
By providing more than one hook of a claw with a guiding notch, a very high stability of the connection between two levels of a shoring tower can be achieved.
In one preferable embodiment, a hook of a claw has a width, which is lower than a distance between two neighboring pairs of radial ledges.
A pair of radial ledges comprises a first and a second radial ledge with different lengths.
By means of the lower width of the hook compared with the distance between two neighboring pairs of radial ledges, a very easy and fast connection of the claw with the block guide can be enabled. Having a correct alignment, the claw falls basically by itself into the block guide and can be brought into the connected position (condition) very easily.
According to the invention, there are only at least two, preferably three, preferred four pairs of radial ledges, preferably exactly five.
A very high stability of the connection between two levels of a shoring tower can be achieved.
In one embodiment, neighboring radial ledge walls (14) of two neighboring pairs of radial ledges (6, 7) are arranged in parallel to each other.
By means of the parallel arrangement, a very easy and fast connection of the claw with the block guide can be enabled. Only in correct alignment, the claw can thus fall basically by itself into the block guide and the assembly operator perceives respectively recognizes directly, that the claw has found the entry to the block guide.
In a preferable embodiment, a hook of the claw and/or a radial ledge of the block guide have a guiding slant (ramp).
By means of a guiding slant, a very easy and fast connection of the claw with the block guide is enabled.
In a preferable embodiment, the claw can be brought in an end position by means of a rotation by at least 25 degree, preferably 35 degree, preferred 40 degree and/or at most 120 degree, preferably 105 degree, preferred 90 degree.
As the claw can be brought in the block guide, i.e. after putting on and insertion of the claw respectively the hook or hooks in the block guide, by means of a rotation in an end position, a very easy and fast assembly as well as a very high stability of the connection between two levels of the shoring tower can be enabled. Furthermore, a rotation by the above described rotation angle range requires very little space and thereby enables a very high safety against falls.
In one embodiment, the wall of a longer second radial ledge, which overhangs (protrudes) radially over a first radial ledge, serves as end stop for a claw or a hook of a claw.
Hereby, a very high stability of the connection, wear resistance of the side railing and safety against falls can be achieved.
In a preferable embodiment, the side railing provides a rotation locking device for (as) the third connection point at the opposite side of the vertical bar and/or a rotation locking device of the side railing can be guided sidewise over a receiving means, particularly a perforated disc, preferably of a sideward adjacent shoring tower element, particularly by mere rotation of the side railing.
Mere rotation means that an insertion in the receiving means by means of rotation can occur by itself, thus not for example by means of necessary hooking in or hanging up movements in addition to the rotation movement as consequence of undercutting contours in rotation direction between the rotation locking device and the receiving means.
By means of a rotation locking device as third connection point or a sidewise over a receiving means pushable respectively guidable rotation locking device, a claw can be brought in an end position respectively connected position (condition) very easily and fast after putting on and insertion into the block guide by means of a rotation movement. At the same time, a very high stability of the connection between two levels of shoring towers can be achieved.
In one embodiment, a latching means, preferably wedge, being detaching-secured at the rotation locking device for a rotation fixation of the rotation locking device is provided at the receiving means, wherein preferably the latching means can be guided particularly vertically through an upper opening in the rotation locking device, through a recess in the receiving means and finally through a lower opening in the rotation locking device. A very reliable rotation locking effect can thereby be achieved.
In one embodiment, the rotation fixation device is asymmetrically constructed in vertical direction. This enables a very easy pushing on the receiving means.
In one preferable embodiment, an adjacent shoring tower element is a side railing and/or four identically constructed or at least substantially identically constructed side railings can form one level of a shoring tower.
Hereby, the number of parts can be reduced and a side railing be provided with low production effort.
In one preferable embodiment, the side railing is configured such that it can be brought by means of a rotation from inside to outside and/or counterclockwise in an end position.
A side railing, which can be mounted (assembled) respectively brought by means of a rotation from inside to outside particularly counterclockwise in an firmly connected position (condition) or end position, enables a very safe assembly and a very high protection against falls.
A rotation in opposite direction would have the consequence that even in end position of the claw-block-guide-connection of the side railing until the latching of the third connection point the assembly operator would for example in case of stumbling or falling against the half completely assembled side railing find no resistance against falling. Additionally, the assembly operator would have to work on the border of the shoring tower for insertion of the side railing in order to putting on the side railing from outside the shoring tower and bringing it into end position by means of rotation to the border of the shoring tower. Through rotation from inside towards the border, a very low risk of falling down side railings can thus be achieved.
In a preferable embodiment, the side railing is configured such that it can be also brought by a rotation from outside to inside and/or also clockwise in an end position.
Hereby, for certain types of shoring towers or a combination of different shoring towers, a more flexible assembly is enabled while tolerating lower safety.
In one embodiment, a longer second radial ledge is arranged by (seen from) a first radial ledge in clockwise direction. This enables a side stop at the shoring tower border during assembly of the side railing by hanging up and rotation in counterclockwise direction respectively from inside to outside.
A further aspect of the invention concerns a method for assembly of a side railing, according to claim 12 wherein a side railing is straighten up until the claw falls by itself into the block guide, particularly followed by a rotation of the claw relative to the block guide in direction of or until an end stop, wherein particularly in assembled condition a gap between the claw and the end stop can remain.
By means of this method, a very effort saving, simple and fast assembly of a side railing is enabled.
By providing a remaining gap in assembled condition, a side railing can be rotated slightly beyond the outer border of the shoring tower in order to enable a very high flexibility during assembly and/or a combination of different types of shoring towers. Not forming part of the present invention, is a shoring tower with a side railing particularly according to one of the above described embodiments, wherein the shoring tower is a load-bearing scaffold or support frame for shoring a beam for building a hall ceiling or a bridge and/or the shoring tower provides a head jack with adjustable spindle for shoring a beam or other components to be shored.
A load-bearing scaffold or support frame respectively a shoring tower with a head jack with adjustable spindle can enable the advantageous effects of the above described side railing. The features described in the introduction of the description, of the embodiments, of the figure description along with below described embodiments and examples can be applied alone or in variable combination, within the scope defined by the appended claims. The invention is described in details in the following with figures schematically showing embodiment examples of a side railing for a shoring tower and embodiments with references to the figures as well as further preferable embodiments.
It shows:

Figure 1a: Long side railing
Figure 1b: Short side railing
Figure 1c: Low, long side railing
Figure 1d: Low, short side railing
Figure 1e: Entry railing, long
Figure 1f: Entry railing, short
Figure 2: First upper vertical bar end with block guide
Figure 3: Claw-block-guide-connection
Figure 4: Rotation locking device in locked condition
Figure 5: Assembly of the second level of a shoring tower with a claw guided in the block guide
Figure 6: Assembly of the second level of a shoring tower with claw-block-guide-connection
Figure 7: Shoring tower

The figures 1 a to 1f show different side railings 1 for a shoring tower 5, , which can be used for fabrication or reconstruction of buildings, with three connection points to adjacent side railings 1, entry side railing 19 or a base frame 18, which forms the link between the side railings 1 of the first level and the ground while being adjustable in height via spindle rods. Above the base frame 18, the levels of the shoring respectively the shoring of the levels is only formed by side railings 1 and at least one entry side railing 19 in the first level. Hereby, the number of parts and the production expense can be kept low.
Particularly, the side railings 1 shown in the figures 1a to 1d have not climb through (entry) openings, which exceed 470 mm. Hereby, a side railing 1 can realize aside of the stability function a very high side protection function respectively advancing side protection function against falls during assembly. A number of vertical bars can be used advantageously as a ladder.
Figures 1e and 1f as well as the figures 5 and 6 show an entry side railing 19, which has an opening for climbing (entering) the inner of the shoring tower 5 and is larger than 500 mm. There are arranged a claw 4 at a first lower end of a vertical bar 2 of the side railing 1 and a block guide 3 at a second upper end of the vertical bar 2. Particularly, all block guides 3 and/or all claws 4 of the shoring tower 5 are identically constructed.
The figure 2 shows a ring-shaped block guide 3 as a one piece, which is firmly joined to the vertical bar 2 with a short distance to respectively stick out distance 10 of the first end of the vertical bar 2 preferably by means of welding to the vertical bar 2.
The block guide contour comprises four pairs of radial ledges 6, 7, wherein a first radial ledge 6 is wider and in radial direction shorter than the counterclockwise adjacent second radial ledge. As shown in figure 3, it can thereby serve the first radial ledge 6 as guide for the rotation motion during connecting with the claw 4 and the second radial ledge 7 as end stop for the claw 4.
The block guide entry 13, through which the claw 4 can fall into the block guide 3, is formed by two in parallel neighboring radial ledge walls 14 that have a distance between each other (figure 3). Corresponding to the four pairs of radial ledges 6, 7 respectively the four block guide entries 13, the claw 4 has four hooks 11, which can be inserted respectively can fall loosely into the block guide entries 13.
At the same time, the hooks 11 enable by means of putting on in a block guide entry 13 a very easy putting on without slipping off. The side railing 1 is then just to be straighten up and falls by itself with all hooks 11 in the corresponding block guide entries 13. This allows a very effort saving and easy assembly.
The block guide entry 13 has a material bridge towards the vertical bar 2 between the tow neighboring pairs of radial ledges 6, 7 in order to form a surrounding ring. A very easy welding and a high stability can thereby be achieved.
The figure 3 shows the guiding notch 12 of a hook 11, which can encompass the first radial ledge of the block guide 3 through three guiding notch surfaces for a tight-fitting guiding. The side railing cannot tilt away due to the tight-fitting encompassing. Furthermore, the end stop restrict a rotation of the side railing 1 beyond the border of the shoring tower 5, wherein an assembly play of a few degree, preferably at most 10 degree in total, is provided. This enables that already the claw-block-guide-connection alone (itself) allows counteracting a fall of an assembly operator during assembly (figure 6). The assembly play enables a very high flexibility during assembly and connecting of different types of shoring towers.
Tilting can be avoided despite the low overlap length (15) in vertical direction. A side railing 1 with very low material consumption and weight can thereby be provided.
The figure 4 shows the side of side railing 1 opposed to the vertical bar 2 with a rotation locking device 16, which can be pushed sidewise loosely over a perforated disk 17 by means of rotation about the vertical bar axis 8 and be fixed by means of a wedge. The wedge is guided through two openings of the rotation locking device 16, wherein between of them, the wedge is also penetrating an opening of the perforated disk 17. A very stable rotation locking effect can thereby be achieved.
Particularly, a U-shaped recess is provided as guiding means for the perforated disk 17 and/or arranged closer to the upper side of the rotation locking device 16 - thus being asymmetric. This enables a very easy pushing over and insertion of the wedge.
For assembly of a new level of the shoring tower 5, a side railing 1 is put on with the hook 11 of a claw 4 in a block guide entry 13 under an angle of 45 degree - thus from inside the shoring tower - and the side railing 1 is straighten up until the claw 4 falls by itself into the block guide 3. Subsequently, the side railing 1 is rotated by 45 degree respectively until the end stop towards outside, preferably counterclockwise, until (slightly) beyond the outer border of the shoring tower 5.
Subsequently, the next side railing 1, preferably counterclockwise to the neighboring previously mounted (connected) side railing 1 of the present shoring level, is put with the claw 4 on the block guide 3 of the one level lower arranged side railing 1 or base frame 18 or entry side railing 19. The above described assembly procedure is repeated also for the new side railing 1. A different results in that at the end of the rotation motion until respectively shortly before the end stop, the rotation locking device 16 is pushed by itself over the perforated disk 17 of the previously mounted (connected) side railing 1. Finally, the wedge has just to be guided through the openings of the rotation locking device 16 and the perforated disk 17 and eventually be fixated by hammering. This procedure is repeated for the remaining two side railings 1 of the shoring level to be assembled. A new shoring level can thereby be built very fast and easily until the shoring tower 5 as reached the intended height.
Figure 7 shows an embodiment of such a shoring tower 5 with a side railing 1, wherein the shoring tower 5 is a load-bearing scaffold or support frame for shoring a beam for building various support structures and/or provides a head jack, preferably fork-shaped head jack, with adjustable spindle for shoring a beam or other components to be shored.
Particularly, two perforated disks 17 are mounted at the vertical bar 2, preferably one perforated disk 17 in the upper area and a second perforated disk 17 in a middle area. Thereby, high flexibility and connectivity with other shoring systems as well as for example low side railing 1 can be enabled.
Particularly, a transport bracket is provided in an upper area and/or adjacent to a perforated disk 17. Thereby, the side railing 1 can be moved very easily by means of a crane or other lifting tools.

Claims

Side railing (1) for a shoring tower (5), which can be used for fabrication or reconstruction of buildings, with three connection points to adjacent shoring tower members, wherein a first connection point is a block guide (3), by which a restricted guidance along an intended motion path of a connecting part is defined, arranged at a first end of a vertical bar (2) and a second connection point is a claw (4) arranged at a second end of the vertical bar (2), wherein the claw (4) is connectable with an identically constructed block guide (3) of an adjacent shoring tower member, wherein the block guide (3) is formed by two radial ledges (6, 7) having different lengths, the claw (4) has a hook (11) with a guiding notch (12) that allows encompassing the first radial ledge (6) of the block guide (3) for a tight-fitting guiding, characterized in that
a wall of a longer second radial ledge (7), which overhangs radially over a first radial ledge (6), serves as end stop for a hook (11) of the claw (4),
wherein the block guide (3) has a ring shape wherein a block guide entry (13), through which the claw (4) can fall into the block guide (3), is formed by two in parallel neighboring radial ledge walls (14) that have a distance between each other,
wherein there are only at least two, preferably three, preferred four pairs of radial ledges (6, 7) and at least two, preferably three, preferred four hooks (11) each with a guiding notch (12), such that the side railing (1) allows to be straighten up and to fall by itself with all hooks (11) in the corresponding block guide entries (13).
Side railing (1) of one of the preceding claims, characterized in that the claw (4) overlaps in a tight-fitting manner the block guide (3) and the adjacent shoring tower member in connected condition over an overlap length (15) in vertical direction, wherein the overlap length (15) particularly corresponds to at most 3 times, preferably 2,5 times, preferred at most 2 times a block guide thickness.
Side railing (1) of one of the preceding claims, characterized in that the block guide (3) is a one piece.
Side railing (1) of one of the preceding claims, characterized in that the first end of the vertical bar (2) sticks out of the block guide (3) in vertical direction by at most 1,4 cm, preferably at most 1 cm, preferred at most 0,7 cm.
Side railing (1) of one of the preceding claims, characterized in that a first radial ledge (6) is wider than a second radial ledge (7).
Side railing (1) of one of the preceding claims, characterized in that a guiding notch (12) of the claw (4) with two, preferably three guiding notch surfaces can be guided in a tight-fitting manner along a first radial ledge (6) of the block guide (3).
Side railing (1) of one of the preceding claims, characterized in that a hook (11) of a claw (4) has a width, which is lower than a distance between two neighboring pairs of radial ledges (6, 7).
Side railing (1) of one of the preceding claims, characterized in that the neighboring radial ledge walls (14) of two neighboring pairs of radial ledges (6, 7) are arranged in parallel to each other.
Side railing (1) of one of the preceding claims, characterized in that a hook of the claw (4) has a guiding slant (9).
Side railing (1) of one of the preceding claims, characterized in that the claw (4) can be brought in an end position by means of a rotation by at least 25 degree, preferably 35 degree, preferred 40 degree and/or at most 120 degree, preferably 105 degree, preferred 90 degree.
Side railing (1) of one of the preceding claims, characterized in that an adjacent shoring tower element is a side railing (1) and/or that four identically constructed or at least substantially identically constructed side railings (1) can form one level of a shoring tower (5).
Method for assembly of a side railing (1) according to one of the preceding claims, characterized in that a side railing (1) is straighten up until a claw (4) falls by itself into a block guide (3), by which a restricted guidance along an intended motion path of a connecting part is defined, wherein the block guide (3) is formed by two radial ledges (6, 7) having different lengths, wherein a wall of a longer second radial ledge (7), which overhangs radially over a first radial ledge (6), serves as end stop for the hook (11) of the claw (4), particularly followed by a rotation of the claw (4) relative to the block guide (5) in direction of or until the end stop,
wherein the block guide (3) has a ring shape and the claw (4) has a hook (11) with a guiding notch (12) that allows encompassing the first radial ledge (6) of the block guide (3) for a tight-fitting guiding,
wherein a block guide entry (13), through which the claw (4) can fall into the block guide (3), is formed by two in parallel neighboring radial ledge walls (14) that have a distance between each other,
wherein there are only at least two, preferably three, preferred four pairs of radial ledges (6, 7) and at least two, preferably three, preferred four hooks (11) each with a guiding notch (12), such that the side railing (1) allows to be straighten up and to fall by itself with all hooks (11) in the corresponding block guide entries (13).