Scaffolding support for scaffolding

Abstract

The invention relates to a scaffolding support (10) for scaffolding, which extends along a scaffolding support longitudinal axis (13) and comprises an upper flange (11) and a lower flange (12). The upper flange (11) contains a supporting profile (30) comprising supporting limbs (30.1, 30.2) which extend on either side of a longitudinal central plane (31) at a transverse distance from one another and each extend upwards away from the upper transverse wall (17). The supporting limbs (30.1, 30.2) each comprise a free supporting limb end (32.1, 32.2) comprising a bearing edge (33.1, 33.2) for bearing a bearing device. The supporting limbs (30.1, 30.2) have supporting limb parts (37.1, 37.2) which are each delimited, on a supporting limb outer side (38.1, 38.2) pointing away from the respective other supporting limb (30.2, 30.1), by a supporting limb outer surface (39.1, 39.2) extending along the longitudinal central plane (31), and each extend, when viewed in a cross-section (22) perpendicular to the scaffolding support longitudinal axis (13), from the respectively associated supporting limb outer surface (39.1, 39.2) or from a supporting limb bearing surface (40.1, 40.2) for bearing a bearing device, which supporting limb bearing surface adjoins the supporting limb outer surface transversely to the respective other supporting limb part (37.2, 37.2), upwards away from the upper transverse wall (17) and inwards (68.1, 68.2) towards the longitudinal central plane (31) of the supporting profile (30).

Description

[0001] Scaffold supports for construction scaffolding

[0002] The invention relates to a scaffold support for construction scaffolding according to the preamble of claim 1.

[0003] Technological background and state of the art

[0004] Scaffold girders of the type mentioned above are used, for example, when large spans need to be bridged and / or heavy loads need to be supported, such as in suspended scaffolding. These scaffold girders can also be used for platform scaffolding.

[0005] Scaffold beams of the type mentioned above are known from WO 2019 / 161824 A1 and WO 2019 / 161825 A1 of the applicant. This scaffold beam is also referred to therein as a U-profile beam. It has a top chord with an outwardly open U-profile. The U-profile is designed for attaching certain hooks, in particular for scaffold platforms. These hooks are also referred to as U-claws or U-hooks. Hooks designed for resting on round tubes, in particular on longitudinal and transverse ledgers, and which are also referred to as O-claws or O-hooks, cannot be usefully attached to this U-profile beam. This is because these O-claws have a specific inner radius, which causes them to sit too high when placed on the bearing edges of the parallel support webs of the upwardly open U-profile of the U-profile beam, so that the scaffold platforms equipped with them wobble or...would tip over. From DE 10 2014 008 522 A1, a scaffold girder for construction scaffolding is known, comprising at least two parallel profile sections in the form of a top chord and a bottom chord, which are connected to each other by several central, middle connecting webs arranged in a line one behind the other at a longitudinal distance along the top chord. The top chord is a first hollow body with a substantially circular cross-section. The bottom chord is a second hollow body with a cuboid cross-section. On both longitudinal sides of the top chord, keders in the form of undercut grooves are provided for attaching components such as sheets or keder tarpaulins, each extending over the length of the scaffold girder.There is no open groove or channel at the top for attaching components, so securing and guiding vertical fasteners for attachments or additional components mounted vertically above the scaffold beam is not straightforward and only possible with the risk of jamming. Due to the closed top profile of the top chord, O-cradles for scaffold decks could be placed on it. However, the central, single web is prone to buckling under higher loads. Attaching a caster unit or placing one or more casters on the round profile of the top chord would be a practical solution.

[0006] A similar scaffold girder is known from WO 2023 / 082881 A1. This also consists of a top chord designed with a first hollow profile and a bottom chord designed as a box-shaped hollow profile. Here, too, the top chord and the bottom chord are connected by a single central connecting web. The top chord has a connecting head at its upper end, pointing away from the connecting web in the operating position, which has an upward-facing groove for attaching components. The groove is bounded by laterally limiting legs of the connecting head, which are provided with comparatively wide, horizontal, upper bearing surfaces, so that O-claws of scaffold decks can be placed on them. Due to their relatively large width, the lateral legs in the top chord do not bend inwards under load. Attaching or placing a caster unit or...Using one or more casters is not practical, as the casters would be damaged by the relatively sharp outer edges of the connecting head. Furthermore, the single, central connecting link is prone to buckling under higher loads.

[0007] From EP 3 147 424 A2 of the applicant, a lattice girder for a working and protective scaffold is known. This girder has a top chord and a bottom chord, which are welded to several round tube struts extending between the top and bottom chords. The top and bottom chords are designed and arranged symmetrically about a longitudinal center plane of the lattice girder. Both the top and bottom chords are tubular and have a substantially O-shaped cross-section. Each chord has an outwardly open, undercut, rectangular groove extending in the longitudinal direction for attaching support devices. On the top side of the top chord and on the bottom side of the bottom chord, a flattened area is provided in both edge regions of the respective groove for supporting the connection devices.Each chord, with the exception of the respective groove area, has an essentially circular outer and inner cross-section. Theoretically, O-claws from scaffold platforms could be placed on the top chord. However, the top chord has a comparatively large outer diameter of 60.3 mm, which precludes the placement of O-claws or O-hooks with standardized dimensions. It would also theoretically be possible to attach or place one or more casters or a caster unit, with or without anti-lift devices, which could rest on the top chord, which has a circular outer edge. However, such lattice girders are comparatively heavy and unwieldy. From EP 1 845 215 A1 and the parallel EP 1 961 886 A2 of the applicant, a U-profile girder for a roof, hall, grandstand, staircase, scaffold, or podium is known.This U-profile beam has an outwardly open U-profile with parallel support legs arranged parallel to each other and to the longitudinal center plane of the U-profile, connected by a transverse wall. These legs have bearing edges at their thickened free ends for a support element, such as a cassette roof. The U-profile beam also has a connecting element connected to the transverse wall for attaching and supporting the U-profile to an elongated support element. The connecting element has mounting legs on both sides of the longitudinal center plane for a coupling, which can be detachably attached to the mounting legs at several attachment points along the length of the U-profile beam. The U-profile beam is then attached to the elongated support element by means of this coupling.The U-profile beam has a guide groove, bounded by the transverse wall and open towards the bearing edges of the lateral support legs as well as their inner sides, extending transversely to the support legs. The groove is defined by slot-like grooves arranged at intervals along the inner sides of the two support legs, each extending inwards towards the longitudinal center plane. Placing standard-sized O-cradles of scaffold decks on the bearing edges of the support legs of the U-profile is not practical, as they would protrude too high, creating tripping hazards and causing the decks to tip or wobble. Attaching one or more casters or similar supports is not feasible.In practice, mounting a caster unit on the U-profile will not work due to the comparatively sharp outer edges of the bearing surfaces of the free bearing ends of the U-profile, even if it would theoretically seem possible, including securing it by means of an anti-lift device against lifting off the U-profile support. Summary of the invention.

[0008] The invention is based on the objective of providing a scaffold beam of the type mentioned above, which is comparatively lightweight and load-bearing and which can practically accommodate scaffold components, in particular scaffold platforms, with O-claws or O-hooks. The O-hooks of the scaffold components should have as little play as possible with respect to the scaffold beam. The detachable attachment or fastening of attachments vertically above the top chord must be possible. The attachment or placement of one or more casters, in particular a caster unit, for example for mobile scaffold structures on the scaffold beam, should also be possible. In particular, the invention is based on the objective of modifying the scaffold beam known from the two patents mentioned above, with the fewest possible structural modifications to its top chord, so that O-hooks or O-hooks can be attached to it.O-claws of scaffold platforms can be laid down in a practical manner, whereby the scaffold support offers advantageous possibilities for attaching or laying down one or more casters, in particular a caster unit, and for securing them against lifting by means of an anti-lift device, in which at least one caster with a convex bearing cross-section can be safely supported and rolled on the top chord without the risk of damage.

[0009] This problem is solved by the features of claim 1. Accordingly, the invention relates to a scaffold girder for construction scaffolding, which extends along a longitudinal axis of the scaffold girder and which has a top chord and a bottom chord, wherein the bottom chord comprises a hollow profile extending along the longitudinal axis of the scaffold girder, preferably closed in cross-section, which includes a first side wall, a second side wall, preferably substantially parallel, an upper transverse wall and a lower wall, in particular a lower transverse wall, which extend along the longitudinal axis of the scaffold girder and which enclose a hollow profile cavity, and wherein the top chord comprises a support profile with support legs.of which a first support leg and a second support leg extend on both sides of a longitudinal center plane of the support profile containing the longitudinal axis of the scaffold girder or formed parallel to the longitudinal axis of the scaffold girder at a transverse distance from each other and each away from the upper transverse wall (upwards), and wherein the first support leg has a first free support leg end with a first bearing edge for supporting a support device, for example O-claws or O-hooks of scaffold components designed for support on round tubes, in particular scaffold feet and / or one or more casters of a caster unit, and wherein the second support leg has a second free support leg end with a second bearing edge for supporting one or the support device, for example O-claws or O-hooks of scaffold components designed for support on round tubes,in particular of scaffold ends and / or the casters of the caster unit, and wherein the upper chord has a preferably continuous undercut groove, defined by the upper transverse wall of the hollow profile and open towards the bearing edges of the support legs (upwards), extending along, preferably parallel to, the longitudinal axis of the scaffold girder and transversely to the support legs, for receiving a fastening and / or locking body for fastening and / or locking an attachment or a support device that can be supported on the first bearing edge of the first free end of the first support leg and / or a support device that can be supported on the second bearing edge of the second free end of the second support leg, and wherein the groove, in particular forming a longitudinal slot, extends from the upper transverse wall,is bounded by a first groove-interlocking web extending transversely to the first support leg or to the longitudinal center plane of the support profile and a second groove-interlocking web extending transversely to the second support leg or to the longitudinal center plane of the support profile, which have a transverse distance from each other, and wherein the first support leg extends upwards (away from the upper transverse wall and from the first groove-interlocking web with a first support leg part having the first free support leg end, and wherein the second support leg extends upwards (away from the upper transverse wall and from the second groove-interlocking web with a second support leg part having the second free support leg end, and wherein the first support leg part of the first support leg is bordered on a first support leg outer surface pointing away from the second support leg by a line extending along, preferably parallel to,the first (vertical) support leg outer surface extending along the longitudinal center plane, and wherein the second support leg part of the second support leg is bounded on a second support leg outer surface pointing away from the first support leg by a second (vertical) support leg outer surface extending along, preferably parallel to, the longitudinal center plane, preferably extending parallel to the first (vertical) support leg outer surface, and wherein the first support leg part of the first support leg, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold beam, extends from the first (vertical) support leg outer surface or from a (horizontal, upper) first support leg bearing surface adjoining it transversely to the second support leg part or to the longitudinal center plane of the support profile (inwards) for the support of a support device, preferably inclined and / or curved,from the upper transverse wall (upwards) and towards the longitudinal center plane of the support profile (inwards), and that the second support leg part of the second support leg, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold girder, extends from the second (vertical) support leg outer surface or from a (horizontal, upper) second support leg bearing surface adjoining it transversely to the first support leg part or towards the longitudinal center plane of the support profile (inwards) to support a bearing device, preferably obliquely and / or curved, away from the upper transverse wall (upwards) and towards the longitudinal center plane of the support profile (inwards).

[0010] By the fact that the first support leg part of the first support leg extends, in a cross-section perpendicular to the longitudinal axis of the scaffold beam, from the first vertical outer surface of the support leg or from a (horizontal, upper) first support leg bearing surface adjoining it transversely to the second support leg part or to the longitudinal center plane of the support profile (inwards), to support a support device, preferably obliquely and / or curved, away from the upper transverse wall (upwards) and towards the longitudinal center plane of the support profile (inwards), and that the second support leg part of the second support leg extends, in a cross-section perpendicular to the longitudinal axis of the scaffold beam, from the second vertical outer surface of the support leg or from a (horizontal, upper) first support leg bearing surface adjoining it transversely to the first ...The second support leg bearing surface, extending (horizontally, upper) towards the longitudinal center plane of the support profile (inwards), is designed to support a bearing device, preferably inclined and / or curved, extending away from the upper transverse wall (upwards) and towards the longitudinal center plane of the support profile (inwards). On this upper chord, O-claws of scaffold decks, in particular those of the applicant, can be placed in a practical manner without tilting or wobbling, and / or at least one caster of a caster unit can be placed on this upper chord in a practical manner without the risk of damage.

[0011] The scaffold support is preferably an elongated scaffold support. It can be made of light metal, preferably aluminum or an aluminum alloy. It is particularly preferred that the scaffold support be manufactured in one piece, especially by continuous casting or extrusion.

[0012] The hollow profile can be box-shaped, especially in a rectangular or cuboid shape when viewed in cross-section perpendicular to the longitudinal axis of the scaffold girder.

[0013] According to a particularly preferred embodiment, the first free end of the first support leg and the second free end of the second support leg, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold girder, may have a support leg transverse distance to each other that is much smaller than the outer surface transverse distance that the first outer surface of the first support leg portion of the first support leg and the second outer surface of the second support leg portion of the second support leg exhibit to each other. According to a preferred design, the support leg transverse distance may be less than half, less than three-eighths, or less than one-third of the outer surface transverse distance. These measures allow for an increase or maximization of the bearing surfaces of the two support legs for supporting O-claws or similar components.0- claws and / or are reached by one or more casters, in particular a caster unit.

[0014] According to one embodiment, it can be provided that the first (vertical) support leg outer surface and the second (vertical) support leg outer surface, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold girder, have a maximum outer surface transverse distance to each other which corresponds to a maximum width of the support profile that the support profile has in the area of ​​the first support leg and the second support leg.

[0015] According to a further development, it can be provided that the first (vertical) support leg outer surface and the second (vertical) support leg outer surface, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold girder, have a support leg outer surface distance to each other that corresponds to a side wall outer surface transverse distance or the maximum side wall outer surface transverse distance that a first side wall outer surface of the first side wall of the hollow profile of the bottom chord and a second side wall outer surface of the second side wall of the hollow profile of the bottom chord have to each other.

[0016] According to a particularly preferred embodiment, it can be provided that the first (vertical) support leg outer surface and the second (vertical) support leg outer surface have an outer surface transverse distance or a maximum outer surface transverse distance or the support leg outer surface distance to each other, which is slightly smaller than an inner surface distance between inner surfaces of inner walls of a support device resting on the first bearing edge of the first free support leg end of the first support leg and / or a support device resting on the second bearing edge of the second free support leg end of the second support leg in the form of a hook-in O-claw or hook-in O-claw of a scaffolding component, in particular a scaffolding platform.

[0017] According to one embodiment, it can be provided that the first side wall of the hollow profile, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold support, has a first maximum side wall thickness, and that the second side wall of the hollow profile, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold support, has a second maximum side wall thickness.and that the first free support leg end of the first support leg is offset from the first side wall of the hollow profile by more than twice the maximum thickness of the first side wall towards the longitudinal center plane of the support profile (inwards), and that the second free support leg end of the second support leg is offset from the second side wall of the hollow profile by more than twice the maximum thickness of the second side wall towards the longitudinal center plane of the support profile (inwards).

[0018] According to a preferred embodiment, the first support leg portion of the first support leg may have a first lateral outer bearing surface for supporting a support device, in particular a guide roller having a convex, in particular semicircular or trapezoidal, bearing cross-section, wherein the first lateral outer bearing surface of the first support leg portion of the first support leg, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold girder, is concave, in particular with a first outer radius, and the second support leg portion of the second support leg may have a second lateral outer bearing surface for supporting a support device, in particular a guide roller having a convex, in particular semicircular or trapezoidal, bearing cross-section, wherein the second lateral outer bearing surface,The cross-section, viewed perpendicular to the longitudinal axis of the scaffold girder, is concave, in particular with a second outer radius, preferably the same size or substantially the same size as the first outer radius. This allows for a particularly practical support of at least one caster without the risk of damaging its bearing surface.

[0019] According to a preferred embodiment, it can be provided that the first lateral support outer surface, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold support, is bounded by a first outer radius, and that the second lateral support outer surface, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold support, is bounded by a second outer radius, preferably one that is the same size or substantially the same size as the first outer radius, in particular one that corresponds to the outer radius of a roller bearing surface of a caster or at least one caster, preferably a caster unit, which rests with its caster bearing surface both on the first lateral support outer surface of the first support leg part of the first support leg and on the second lateral support outer surface of the second support leg part of the second support leg.This allows the aforementioned advantages to be realized to a particularly high degree. The respective outer radius can therefore essentially correspond to the outer radius of the roller's bearing surface(s). Ideally, the roller(s) rest fully on the upper flange with their bearing surface(s). According to a particularly preferred embodiment, the first support leg may have a first step or a first bracket on its outer surface, facing away from the second support leg. This first (horizontal, upper) support leg bearing surface, facing away from the upper transverse wall and the first groove-interlocking web (upwards), serves as the bearing surface for a roller or roller.the support device, in particular one or the caster, and that the second support leg has a second step or a second bracket on its outer side, facing away from the first support leg, which has a second (horizontal, upper) support leg bearing surface facing away from the upper transverse wall and the second groove-interlocking web (upwards) for supporting one or the support device, in particular one or the caster. This prevents the support legs from bending inwards or towards the longitudinal center plane under load, especially when one or at least one caster, in particular one of the caster units, is supported on the upper flange. The steps or brackets provide additional support for the at least one caster. This allows for better distribution of the vertical load. By providing the steps or brackets,The play between the O-claw(s) and the upper profile can be further reduced by using consoles. This allows for higher horizontal stiffness of the overall structure.

[0020] According to a preferred embodiment, it may be provided that the first stage or the first console of the first support leg is bounded by the first support leg outer surface of the first support leg part and that the second stage or the second console is bounded by the second support leg outer surface of the second support leg part.

[0021] According to one embodiment, it can be provided that the first support leg, preferably in a vertical first area between the upper transverse wall and the first step or the first bracket, in a cross-section perpendicular to the longitudinal axis of the scaffold girder, has on its first support leg outer side a first support leg recess for attaching an anti-lift device, in particular a caster or the caster unit, which can also be described as an anti-lift device, and / or that the second support leg, preferably in a vertical second area between the upper transverse wall and the second step or the second bracket, in a cross-section perpendicular to the longitudinal axis of the scaffold girder, has on its second support leg outer side a second support leg recess for attaching an anti-lift device, in particular a caster or the caster unit.The first support leg recess and / or the second support leg recess can be used to engage behind the anti-lift device.

[0022] According to a preferred embodiment, the first bearing edge of the free first support leg end of the first support leg may have a substantially flat, first (upper) horizontal bearing surface extending along the longitudinal axis of the scaffold girder, preferably continuously, for supporting a support device, for example, O-claws or O-hooks of scaffold components, in particular scaffold ends, designed and configured for support on round tubes, and the second bearing edge of the free second support leg end of the second support leg may have a substantially flat, second (upper) horizontal bearing surface extending along the longitudinal axis of the scaffold girder, preferably continuously, for supporting a support device, for example, O-claws or O-hooks of scaffold components, in particular scaffold ends, designed and configured for support on round tubes.This allows a vertical load to be transferred more effectively into the scaffold beam. Furthermore, it ensures that the outer support legs are pressed inwards, or not at all, towards the longitudinal center plane. According to a particularly preferred embodiment, the first horizontal bearing surface and the second horizontal bearing surface can be arranged in a common horizontal plane, preferably parallel to the longitudinal axis of the scaffold beam, and in particular perpendicular to the longitudinal center plane.

[0023] The groove can be defined by the groove-interlocking webs arranged at a distance from each other and along the inner sides of the two support legs, extending inwards from each of these webs and defining a fastening and / or locking space of the groove, preferably in which a fastening and / or locking element, for example a T-nut, can be detachably arranged at several positions along the groove.

[0024] The support profile of the scaffold beam can, viewed in a cross-section perpendicular to the longitudinal axis of the scaffold beam, have a U-shaped, V-shaped or O-shaped profile cross-section.

[0025] Preferably, the first support leg of the support profile can connect directly to the first side wall of the hollow profile, and the second support leg can connect directly to the second side wall of the hollow profile.

[0026] It is particularly preferred that the support profile or the scaffold beam is designed to be mirror-symmetrical to the longitudinal center plane, in particular the longitudinal axis of the scaffold beam.

[0027] It goes without saying that the aforementioned measures can be combined with each other as desired, within the limits of feasibility.

[0028] An advantageous embodiment of the invention is described below with reference to the figures. Brief description of the figures

[0029] They show

[0030] Figure 1 shows a perspective view of a scaffold support;

[0031] Figure 2 shows a side view of the scaffold support according to Figure 1;

[0032] Figure 3 shows an enlarged section of the scaffold support according to Figure 2;

[0033] Figure 4 shows a perspective view of an enlarged section of the scaffold support according to Figure 1 in the area of ​​its front end;

[0034] Figure 5 shows an enlarged front view of the scaffold support;

[0035] Figure 6 shows a view according to Figure 5, with an O-claw of a scaffold platform placed on the top chord of the scaffold support;

[0036] Figure 7 shows an enlarged view of a section of Figure 6 in the area of ​​the upper chord of the scaffold girder, on which an O-claw of a scaffold platform is supported;

[0037] Figure 8 shows a view according to Figure 5, wherein a caster of a caster unit with a convex cross-section rests fully on the upper chord of the scaffold girder and is secured against lifting or being lifted off the scaffold girder by means of an anti-lift device;

[0038] Figure 9 is an enlarged view of a section of Figure 8 in the area of ​​the upper chord of the scaffold girder on which the caster rests; Figure 10 is a view corresponding to Figure 8, in which a caster with a trapezoidal cross-section rests on the upper chord of the scaffold girder;

[0039] Figure 11 shows a view according to Figure 8, wherein another caster of another caster unit with a support plate for receiving vertical loads, which is equipped with a scaffold coupling, is placed on the top chord of the scaffold girder.

[0040] The scaffold girder 10 for construction scaffolding has a top chord 11 and a bottom chord 12. The scaffold girder 10 extends in a straight line along or parallel to a longitudinal axis 13 of the scaffold girder 10. The bottom chord 12 contains a box-shaped, essentially rectangular in cross-section 15, elongated, closed hollow profile 14. The hollow profile 14 has a first vertical side wall 16.1, a second vertical side wall 16.2, an upper transverse wall 17, and a lower transverse wall 18. The first vertical side wall 16.1, the second vertical side wall 16.2, and the lower transverse wall 18 are each plate-shaped. The lower transverse wall 18 defines a hollow profile base of the hollow profile 14. The hollow profile 14 extends along the longitudinal axis 13 of the scaffold girder. The first vertical side wall 16.1, the second vertical side wall 16.The upper transverse wall 17 and the lower transverse wall 18 of the hollow profile 14 extend along the longitudinal axis 13 of the scaffold girder. The first vertical side wall 16.1, the second vertical side wall 16.2, the upper transverse wall 17, and the lower transverse wall 18 enclose a hollow profile cavity 19 of the hollow profile 14. The hollow profile 14 has a width 20 when viewed in a transverse direction perpendicular to the longitudinal mid-plane 31 and in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder. The hollow profile 14 has a height 21 when viewed in a transverse section 22 perpendicular to the longitudinal mid-plane 31 and perpendicular to the longitudinal axis 13 of the scaffold girder. The hollow profile height 21 is much greater than the hollow profile width 20. Accordingly, viewed in this cross-section 22, the first side wall 16.1 and the second side wall 16.2 of the hollow profile 14 of the lower chord 12 each have an equally long side wall, which is much greater than the length of the lower cross wall and much greater than the length of the upper cross wall. The length of the lower cross wall 18 and the length of the upper cross wall 17 are equal.

[0041] Each side wall 16.1, 16.2 is provided with a plurality of circular cylindrical mounting holes 25, also referred to as support mounting means, for attaching connecting parts or accessories. The mounting holes 25 are arranged in two longitudinal rows 26.1, 26.2 extending in a straight line and parallel to each other. The two longitudinal rows 26.1, 26.2 are arranged at a vertical distance 27 from each other, for example, 100 mm. The mounting holes 25 are spaced equally 28 apart in the direction of their respective longitudinal rows 26.1, 26.2. Preferably, the spacing between the holes is 100 mm. Each mounting hole 25 has an inner diameter, preferably 21 mm. Preferably, an equal number of fastening holes 25 are provided in each longitudinal row 26.1 , 26.2.

[0042] The top chord 11 includes a support profile 30 with support legs 30.1, 30.2, of which a first support leg 30.1 and a second support leg 30.2 extend on either side of a longitudinal mid-plane 31 of the support profile 30 and the scaffold girder 10, respectively, which contains the longitudinal axis 13 of the scaffold girder, respectively, at a transverse distance from each other and upwards 50 from the upper transverse wall 17. The first side wall 16.1 of the hollow profile 14 of the bottom chord 12 transitions into the first support leg 30.1, which extends the first side wall 16.1 of the bottom chord 12 upwards. The second side wall 16.2 of the hollow profile 14 of the bottom chord 12 transitions into the second support leg 30.2, which extends the second side wall 16.2 of the bottom chord 12 upwards. The first support leg 30.1 has a first free support leg end 32.1 with a first bearing edge 33.1 for supporting a support device, for example, O-claws designed for supporting round tubes.The second support leg 30.2 has a second free support leg end 32.2 with a second bearing edge 33.2 for supporting one or more of the support device, for example, O-claws or O-claws 34 designed for supporting round tubes of scaffold components, for example, of the scaffold platform 35 and / or for supporting one or more of the casters 41.1, 41.2, 41.3 of a caster unit 42.1, 42.3. The support profile 30 of the scaffold girder 10, viewed in cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, has a U-shaped or O-shaped profile cross-section 36. The first support leg 30.1 of the support profile 30 adjoins the first side wall 16.1 of the hollow profile 14.The second support leg 30.2 of the support profile 30 connects directly to the second side wall 16.2 of the hollow profile 14, or directly to an upper second corner region of the bottom chord 12, extending upwards to 50, where the first side wall 16.1 and the upper transverse wall 17 are connected. The top chord 11 and the bottom chord 12 both contain the upper transverse wall 17. As can be seen particularly in Figure 5, the scaffold girder 10 is designed symmetrically about a longitudinal plane of symmetry, which coincides with the longitudinal center plane 31 containing the longitudinal axis 13 of the scaffold girder.

[0043] The upper chord 11 has a continuous, undercut groove 45, open upwards 50 towards the bearing edges 33.1 , 33.2 of the support legs 30.1 , 30.2, parallel to the longitudinal axis 13 of the scaffold girder and transverse to the support legs 30.1 , 30.2. The groove 45 is suitable and intended for receiving a fastening and / or locking body for fastening and / or locking an attachment or a support device that can be supported on the first support edge 33.1 of the first free support leg end 32.2 of the first support leg 30.2 and / or a support device that can be supported on the second support edge 33.2 of the second free support leg end 32.2 of the second support leg 30.2, which are not shown in the figures.

[0044] The groove 45 is bounded by a longitudinal slot 46 from the upper transverse wall, 17 by a first groove-interlocking web 47.1 extending transversely to the first support leg 30.1 or to the longitudinal mid-plane 31 of the support profile 30 and by a second groove-interlocking web 47.2 extending transversely to the second support leg 30.2 or to the longitudinal mid-plane 31 of the support profile 30, the free web ends of which have a transverse distance 48 to each other. In other words, the groove 45, forming the longitudinal slot 46, is bounded by the groove-engaging webs 47.1, 47.2, which are arranged at a distance 48 from each other and along the inner sides of the two support legs 30.1, 30.2 and extend from there to the longitudinal center plane 31 and inwards 68.1, 68.2 respectively. The groove-engaging webs 47.1, 47.2 define a fastening and / or locking space 49 of the groove 45.In the fastening and / or locking space 49 of the groove 45, a fastening and / or locking element, for example a T-nut, can be detachably arranged at several positions along the groove, which is not shown in the figures.

[0045] The first support leg 30.1 extends upwards 50 from the upper transverse wall 17 and from the first groove-interlocking web 47.1, with a first support leg portion 37.1 having the first free support leg end 32.1. The second support leg 30.2 extends upwards 50 from the upper transverse wall 17 and from the second groove-interlocking web 47.2, with a second support leg portion 37.2 having the second free support leg end 32.2. The first support leg portion 37.1 of the first support leg 30.1 is bounded on a first support leg outer surface 38.1 pointing away from the second support leg 30.2 by a first vertical support leg outer surface 39.1 extending parallel to the longitudinal mid-plane 31. The second support leg part 37.2 of the second support leg 30.2 is on a second support leg outer side 38 pointing away from the first support leg 30.1.2 is bounded by a second, vertical support leg outer surface 39.2 extending parallel to the longitudinal mid-plane 31. The second support leg outer surface 39.2 extends parallel to the first support leg outer surface 39.1.

[0046] The first support leg part 37.1 of the first support leg 30.1 extends, viewed in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, from the first vertical outer surface of the support leg 39.1 or from a horizontal, upper, first support leg bearing surface 40.1 adjoining it transversely to the second support leg part 37.2 or to the longitudinal center plane 31 of the support profile 30 inwards 68.1, for the purpose of supporting a support device, obliquely and curved upwards 50 from the upper transverse wall 17 and inwards 68.1 towards the longitudinal center plane 31 of the support profile 30. The second support leg part 37.2 of the second support leg 30.2 extends, in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, starting from the second vertical outer surface of the support leg 39.2 or from a surface extending transversely to the first support leg part 37.1.to the longitudinal center plane 31 of the support profile 30 towards the inside 68.2 adjoining, horizontal, upper, second support leg bearing surface 40.2 for the support of one or the bearing device obliquely and curved away from the upper transverse wall 17 upwards 50 and towards the longitudinal center plane 31 of the support profile 30 towards the inside 68.2.

[0047] The support legs 37.1, 37.2 enclose, preferably in a clamp-like manner, an interior space 72 which is open in a first direction along or parallel to the longitudinal central plane 31 away from the upper transverse wall to the outside or upwards 50 and which is bounded in an opposite second direction or downwards by the groove-interlocking webs 47.1, 47.2 of the groove 50. The interior space 72 opens into the fastening and / or locking space 49 of the groove 50, which is bounded upwards 50 by the groove-interlocking webs 47.1, 47.2. The first free support leg end 32.1 of the first support leg 30.1 and the second free support leg end 32.1 of the second support leg 30.1, viewed in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, have a support leg transverse distance 71 to each other, which is much smaller than an outer surface transverse distance 51, which the first support leg outer surface 39.1 of the first support leg part 37.1 of the first support leg 30.1 has.1 and the second support leg outer surface 39.1 of the second support leg part 37.1 of the second support leg 30.1 are oriented relative to each other. In particular, the support leg transverse spacing 71 is less than half, less than three-eighths, or less than one-third of the outer surface transverse spacing 51. For example, the support leg transverse spacing 71 is approximately 16 mm, while the outer surface transverse spacing 51 is approximately 52 mm.

[0048] The scaffold support 10 is made of light metal, preferably aluminum or an aluminum alloy. The scaffold support 10 is manufactured in one piece, in particular by continuous casting or extrusion.

[0049] The hollow profile 14 is box-shaped and, viewed in one or the cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, is rectangular or cuboid in shape.

[0050] The first vertical support leg outer surface 39.1 and the second vertical support leg outer surface 39.2, viewed in a cross-section 22 perpendicular to the scaffold girder longitudinal axis 13, have a maximum outer surface transverse distance 51 to each other, which corresponds to a maximum width 52 of the support profile 30, which the support profile 30 has in the area of ​​the first support leg 30.1 and the second support leg 30.2. Furthermore, the first vertical support leg outer surface 39.1 and the second vertical support leg outer surface 39.2, viewed in a cross-section 22 perpendicular to the scaffold girder longitudinal axis 13, have a support leg outer surface distance to each other which corresponds to the maximum outer surface transverse distance 51 that a first side wall outer surface 53.1 of the first side wall 16.1 and a second side wall outer surface 53.2 of the second side wall 16.2 have to each other.

[0051] The first support leg outer surface 39.1 and the second support leg outer surface 39.2, viewed in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, have a support leg outer surface distance 51 to each other, which corresponds to a side wall outer surface transverse distance 20 or a maximum side wall outer surface transverse distance 20, which a first side wall outer surface 53.1 of the first side wall 16.1 of the hollow profile 14 of the bottom chord 12 and a second side wall outer surface 53.2 of the second side wall 16.2 of the hollow profile 14 of the bottom chord 12 have to each other.

[0052] The outer surface lateral distance 51, or the maximum outer surface lateral distance 51, or the support leg outer surface distance 51 of the support leg outer surfaces 39.1, 39.2 is slightly smaller than an inner surface distance 54 between inner surfaces of inner walls 55.1, 55.2 of an O-claw or O-claw 34 of a scaffold platform 35 resting on a substantially planar first bearing surface 56.1 of the first bearing edge 33.1 of the first free support leg end 32.1 of the first support leg 30.1 and on a substantially planar second bearing surface 56.2 of the second bearing edge 33.2 of the second free support leg end 32.2 of the second support leg 30.2. The first inner wall 55.1 of the O-claw or O-claw 34 has an inner radius 69.1. The second inner wall 55.2, opposite the first inner wall, has an inner radius 69.2. As can be seen from Figure 7, the O-claw orThe O-claw of the scaffold platform 35 with the inner surface 70 of its third, horizontal inner wall 55.3 fully rests on the two upper, horizontal, essentially planar bearing surfaces 56.1, 56.2 of the bearing edges 33.1, 33.2 of the free support leg ends 32.1, 32.2 of the support leg parts 37.1, 37.2 of the support legs 30.1, 30.2. In one or the aforementioned cross-section 22 viewed perpendicular to the scaffold girder longitudinal axis 13, the first side wall 16.1 of the hollow profile 14 has a first maximum side wall thickness 57.1 and the second side wall.

[0053] 16.2 of the hollow profile 14 has a second maximum side wall thickness 57.2. The first free support leg end 32.1 of the first support leg 30.1 is offset inwards 68.1 towards the longitudinal center plane 31 of the support profile 30 or towards the longitudinal center plane 31 of the scaffold beam 10 by more than twice the maximum first side wall thickness 57.1 of the first side wall 16.1. The second free support leg end 32.2 of the second support leg

[0054] 30.2 is more than twice the maximum second side wall thickness 57.2 of the second side wall 16.2 of the hollow profile 14 in the direction of the longitudinal center plane 31 of the support profile 30 or in the direction towards the longitudinal center plane 31 of the scaffold beam 10.

[0055] 68.2 arranged offset.

[0056] As can be seen particularly from Figures 5, 8, and 9, the first support leg part 37.1 of the first support leg 30.1 has a first lateral outer bearing surface 58.1 for supporting a support device in the form of at least one caster 41.1, 41.2, 41.3 having a convex, in particular semicircular or trapezoidal, bearing cross-section. The first lateral outer bearing surface 58.1 of the first support leg part 37.1 of the first support leg 30.1 is convex in cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, in particular with a first outer radius 59.1.

[0057] The second support leg part 37.2 of the second support leg 30.2 has a second lateral outer bearing surface 58.2 for supporting the support device in the form of at least one caster 41.1, 41.2, 41.3 having a convex, in particular semicircular or trapezoidal, bearing cross-section. The second lateral outer bearing surface 58.2 of the second support leg part

[0058] 37.2 of the second support leg 30.2 is, in a cross-section 22 considered perpendicular to the longitudinal axis 13 of the scaffold girder, concave, in particular designed with a second outer radius 59.2, preferably which corresponds to or is equal to the first outer radius 59.1.

[0059] The first lateral bearing surface 58.1 of the first support leg 30.1, viewed in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, is bounded by the first outer radius 59.1. The second lateral bearing surface 58.2 of the second support leg 30.2, viewed in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, is bounded by the second outer radius 59.2, which is equal to or substantially equal to the first outer radius 59.1. Preferably, the first and second outer radii 59.1, 59.2 are selected such that they each correspond to a roller outer radius 44.1, 44.3 of a roller bearing surface having a semicircular outer cross-section 43.1, 43.3 of a roller bearing unit 42.1, 42.3, which rests with its roller bearing surface on the first lateral outer bearing surface 56.1 of the first support leg 30.1 as well as on the second lateral outer support surface 56.2 of the second support leg 30.2 (see Figures 8 and 9 as well as 11). However, it is understood that a caster 16.2 or several casters can also be placed on the first and second lateral outer support surfaces 56.1, 56.2 of the support leg 30.1, 30.2, the bearing surface of which has a different cross-section, for example a trapezoidal cross-section 43.2. This is illustrated by way of example in Figure 10. In this case, the caster 16.2, with essentially planar bearing surfaces which, viewed in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, run in a straight line, can be supported on both the first lateral outer bearing surface 56.1 of the first support leg 30.1 and the second lateral outer bearing surface 56.2 of the second support leg 30.2 (see Figure 10).

[0060] The first support leg 30.1 indicates at its point that it differs from the second support leg

[0061] 30.2, the outer surface of the first support leg 38.1 has a first step or a first bracket 60.1. The first step or bracket 60.1 has the first horizontal, upper support leg bearing surface 50, pointing upwards away from the upper transverse wall 17 and from the first groove-interlocking web 47.1.

[0062] 40.1 for supporting a support device, in particular in the form of a caster 41.1, 41.2, 41.3. The second support leg 30.2 has a second step or a second bracket 60.2 on its second outer side 38.2, which points away from the first support leg 30.1. The second step or the second bracket 60.2 has a second, horizontal, upper support leg bearing surface 40.2, which points upwards 50 away from the upper transverse wall 17 and from the second groove-interlocking web 47.2, for supporting a support device, here in the form of a caster 41.1, 41.2, 41.3. The first step or console 60.1 of the first support leg 30.1 is bounded by the outer surface 39.1 of the first support leg part 37.1. The second step or console 60.2 is bounded by the outer surface 39.2 of the second support leg part 37.2.As can be seen from Figures 8 to 11, a bearing surface 40.1 of the first support leg 30.1 and the second support leg 30.2 can be formed on the outer lateral bearing surfaces 58.1, 58.2 of the first and second support leg parts 37.1, 37.2 of the first and second support legs 30.1, 30.2 with their outer, and essentially planar, circumferential edges 62.1, 62.2; 63.1, 63.2, viewed in the direction of their axes of rotation 61.1, 61.2, 61.3, which are located on the outside in the direction of their axes of rotation 61.1, 61.2, 61.3. 64.1, 64.2 supporting roller 41.1, 41.2, 41.3 additionally supports. This allows for better distribution of the vertical load and reduces the risk of bending of the support legs 30.1, 30.2 towards the longitudinal center plane 31 of the support profile 30 or towards the longitudinal center plane 31 of the scaffold girder 10 or inwards 68.1.

[0063] 68.2 can be further minimized.

[0064] The first support leg 30.1 has, in a vertical first area between the upper transverse wall 17 and the first step or the first console 60.1, in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, a first support leg recess 65.1, preferably convex, on its first support leg outer side 38.1 for fastening an anti-lift device 67.1, in particular a caster, in particular a caster unit 42.1. The second support leg 30.2 has, in a vertical second area between the upper transverse wall 17 and the second step or the second bracket 60.2, in a cross-section 22 perpendicular to the longitudinal axis 13 of the scaffold girder, a second support leg recess 65.2, preferably convex, on its second support leg outer surface 38.2 for fastening the anti-lift device 67.1 (see Figures 8 and 9). The first support leg recess 65.The first support leg recess 65.1 and the second support leg recess 65.2 can therefore be used to engage behind the lifting safety device 67.1. Preferably, the first support leg recess 65.1 and the second support leg recess 65.2 can each be designed to extend continuously in a longitudinal direction along or parallel to the longitudinal axis 13 of the scaffold girder.

[0065] The first bearing edge 33.1 of the free first support leg end 32.1 of the first support leg 30.1 has a first, upper horizontal bearing surface 56.1 extending along or parallel to the longitudinal axis 13 of the scaffold girder, preferably continuously, and substantially planar, for supporting O-claws 34 of a scaffold platform 35, which are designed and configured for supporting round tubes. The second bearing edge 33.2 of the free second support leg end 32.2 of the second support leg 30.2 has a second, upper horizontal bearing surface 56.2 extending along or parallel to the longitudinal axis 13 of the scaffold girder, preferably continuously, and substantially planar, for supporting the O-claws 34 of the scaffold platform 35 (see in particular Figures 4 to 7). The first horizontal bearing surface 56.1 of the first bearing edge 33.1 of the first support leg 30.1 and the second horizontal bearing surface 56.2 of the second bearing edge 33.The two sections of the second support leg 30.2 are arranged in a common horizontal plane 66, which is parallel to the longitudinal axis 13 of the scaffold girder and perpendicular to the longitudinal center plane 31 of the scaffold girder 10. Reference numeral list.

[0066] 10 scaffold beams

[0067] 11 Upper chord

[0068] 12 Lower belt

[0069] 13 Scaffold girder longitudinal axis

[0070] 14 Hollow profile

[0071] 15 cross-section of 14

[0072] 16.1 (first, vertical) side wall of 14

[0073] 16.2 (second, vertical) side wall of 14

[0074] 17 Upper transverse wall

[0075] 18 Lower wall / lower cross wall

[0076] 19 Hollow profile cavity

[0077] 20 Hollow profile width / (maximum) side wall outer surface transverse spacing

[0078] 21 Hollow profile height

[0079] 22 Cross-section (perpendicular to the longitudinal axis of the scaffold girder 13)

[0080] 25 Mounting hole / beam mounting device)

[0081] 26.1 (first, upper) longitudinal row

[0082] 26.2 (second, upper) longitudinal row

[0083] 27 Height difference (between 26.1 and 25.2)

[0084] 28 hole spacing

[0085] 29 Bore inner diameter

[0086] 30 support profile

[0087] 30.1 (first) support leg of 30

[0088] 30.2 (second) support leg of 30

[0089] 31 Longitudinal mid-plane or longitudinal mid-plane of 30 or 10 /

[0090] Longitudinal plane of symmetry

[0091] 32.1 (first) free support leg end of 30.1

[0092] 32.2 (second) free support leg end of 30.1

[0093] 33.1 (first) support edge of 32.1 33.2 (second) support edge of 32.1

[0094] 34 O-claw / O-claw

[0095] 35 Scaffolding component / Scaffolding platform

[0096] 36 Profile cross-section of 30

[0097] 37.1 (first) support leg part of 30.1

[0098] 37.2 (second) support leg part of 30.1

[0099] 38.1 (first) outer side of the support leg of 37.1

[0100] 38.2 (second) outer side of the support leg of 37.1

[0101] 39.1 (first, vertical, lateral) support leg outer surface

[0102] 39.2 (second, vertical, lateral) support leg outer surface

[0103] 40.1 (first, horizontal, upper) support leg bearing surface

[0104] 40.2 (second, horizontal, upper) support leg bearing surface

[0105] 41.1 Driving roller (Figs. 8 and 9)

[0106] 41.2 Caster (Fig. 10)

[0107] 41.3 Roller (Fig. 11)

[0108] 42.1 Caster unit (Figs. 8 and 9)

[0109] 42.3 Caster unit (Fig. 11)

[0110] 43.1 (partially circular) outer cross-section of 41.1

[0111] 43.2 (trapezoidal) outer cross-section of 41.2

[0112] 43.3 (partially circular) outer cross-section of 41.3

[0113] 44.1 Roller outer radius of 41.1

[0114] 44.3 Roller outer radius of 41.3

[0115] 45 Nut

[0116] 46 longitudinal slots

[0117] 47.1 (first) groove-rear interlocking web

[0118] 47.2 (second) groove-rear interlocking web

[0119] 48 Lateral spacing (between 47.1 and 47.2)

[0120] 49 Mounting and / or locking space

[0121] 50 upwards (arrow)

[0122] 51 (maximum) outer surface transverse distance / support leg outer surface distance (of 39.1 and 39.2)

[0123] 52 (maximum) width of 30 53.1 (first) side wall outer surface of 16.1

[0124] 53.2 (second) side wall outer surface of 16.1

[0125] 54 Inner surface distance (of the O-claw 34, Fig. 7)

[0126] 55.1 (first, vertical) interior wall of 34

[0127] 55.2 (second, vertical) interior wall of 34

[0128] 55.3 (third, horizontal) inner wall of 34

[0129] 56.1 (first, upper, horizontal, planar) bearing surface / horizontal bearing surface of 33.1

[0130] 56.2 (second, upper, horizontal, planar) bearing surface / horizontal bearing surface of 33.2

[0131] 57.1 (first, maximum) side wall thickness of 16.1

[0132] 57.2 (second, maximum) side wall wall thickness of 16.2

[0133] 58.1 (first, lateral) outer surface of 37.1

[0134] 58.2 (second, lateral) outer surface of 37.2

[0135] 59.1 (first) outer radius of 58.1

[0136] 59.2 (second) outer radius of 58.2

[0137] 60.1 (first) stage / console of 30.1

[0138] 60.2 (second) stage / console of 30.2

[0139] 61.1 Axis of rotation of 41.1

[0140] 61.2 Axis of rotation of 41.2

[0141] 61.3 Axis of rotation of 41.3

[0142] 62.1 (first, outer) circumferential edge of 41.1

[0143] 62.2 (second, outer) circumferential edge of 41.1

[0144] 63.1 (first, outer) circumferential edge of 41.2

[0145] 63.2 (second, outer) circumferential edge of 41.2

[0146] 64.1 (first, outer) circumferential edge of 41.3

[0147] 64.2 (second, outer) circumferential edge of 41.3

[0148] 65.1 (first, convex) support leg recess

[0149] 65.2 (second, convex) support leg recess

[0150] 66 Horizontal plane

[0151] 67 Lift-off protection / anti-lift device

[0152] 68.1 inwards (arrow) 68.2 inwards (arrow)

[0153] 69.1 Inner radius of 55.1

[0154] 69.2 Inner radius of 55.2

[0155] 70 (horizontal) inner surface of 55.3 71 support leg cross-spacing

[0156] 72 Interior

Claims

Patent claims 1. Scaffold girder (10) for construction scaffolding, which extends along a scaffold girder longitudinal axis (13) of the scaffold girder (10) and which has a top chord (11) and a bottom chord (12), wherein the bottom chord (12) contains a hollow profile (14) extending along the scaffold girder longitudinal axis (13) which forms a first side wall (16.1 ), a second side wall (16.2), an upper transverse wall (17) and a lower wall (18) extending along the longitudinal axis of the scaffold girder (13) extend and form a hollow profile cavity (19) of the hollow profile (14) include, and wherein the top chord (11) contains a support profile (30) with support legs (30.1, 30.2), of which a first support leg (30.1) and a second support leg (30.2) extend on either side of a longitudinal mid-plane (31) of the support profile (30) containing the longitudinal axis (13) of the scaffold girder or formed parallel to the longitudinal axis (13) of the scaffold girder at a transverse distance from each other and each away from the upper transverse wall (17), and wherein the first support leg (30.1) has a first free support leg end (32.1) with a first bearing edge (33.1) for supporting a support device, and wherein the second support leg (30.2) has a second free support leg end (32.2) with a second bearing edge (33.2) for the support of a support device, and wherein the top chord (11) has a bearing edge bounded by the upper transverse wall (17) of the hollow profile (14) and open towards the bearing edges (33.1, 33.2) of the support legs (30.1, 30.2), extending along the longitudinal axis (13) of the scaffold girder and transversely to the support legs (30.1, 30.2) The groove (45) extends over a transverse, undercut groove, and the groove (45) is bounded by the upper transverse wall (17), by a first groove-interlocking web (47.1) extending transversely to the first support leg (30.1) or to the longitudinal mid-plane (31) of the support profile (30), and by a second groove-interlocking web (47.2) extending transversely to the second support leg (30.2) or to the longitudinal mid-plane (31) of the support profile (30), which have a transverse distance (48) from each other, and wherein the first support leg (30.1) is separated from the upper transverse wall (17) and from the first groove-interlocking web by a first support leg part (37.1) having the first free support leg end (32.1). (47.1) extends away, and wherein the second support leg (30.2) extends away from the upper transverse wall (17) and from the second groove-interlocking web (47.2) with a second support leg part (37.2) having the second free support leg end (32.2), and wherein the first support leg part (37.1) of the first support leg (30.1 ) is bounded on a first support leg outer surface (38.1 ) pointing away from the second support leg (30.2) by a first support leg outer surface (39.1 ) extending along the longitudinal mid-plane (31 ), and wherein the second support leg part (37.2) of the second support leg (30.2) is bounded on a second support leg outer surface (38.2) pointing away from the first support leg (30.1 ) by a second support leg outer surface (39.2) extending along the longitudinal mid-plane (31 ), characterized in that the first support leg part (37.1 ) of the first support leg (30.1 ) extends in a cross-section (22) perpendicular to the longitudinal axis of the scaffold girder. (13) considered, starting from the outer surface of the first support leg (39.1) or starting from a first support leg bearing surface (40.1) adjoining it transversely to the second support leg part (37.2) or to the longitudinal mid-plane (31) of the support profile (30) for the support of a support device, extends away from the upper transverse wall (17) and towards the longitudinal mid-plane (31) of the support profile (30), and that the second support leg part (37.2) of the second support leg (30.2), viewed in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold girder, extends from the second support leg outer surface (39.2) or from a second support leg bearing surface adjoining it transversely to the first support leg part (37.1) or to the longitudinal mid-plane (31) of the support profile (30). (40.2) extends from the upper transverse wall (17) to the longitudinal mid-plane (31) of the support profile (30) for the support of a support device or the support device.

2. Scaffold girder according to claim 1, characterized in that the first free support leg end (32.1 ) of the first support leg (30.1 ) and the second free support leg end (32.2) of the second support leg (30.2), viewed in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold girder, have a support leg transverse distance (71 ) to each other which is much smaller than an outer surface transverse distance (51 ) that the first support leg outer surface (39.1 ) of the first support leg part (37.1 ) of the first support leg (30.1 ) and the second support leg outer surface (39.2) of the second support leg part (37.2) of the second support leg (30.2) have to each other.

3. Scaffold support according to claim 2, characterized in that the support leg transverse spacing (71 ) is less than half or less than three eighths or less than one third of the outer surface transverse spacing (51 ).

4. Scaffold support according to one of the preceding claims, characterized in that the first support leg outer surface (39.1 ) and the second support leg outer surface (39.2), viewed in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold support, have a maximum outer surface transverse distance (51 ) to each other, which corresponds to a maximum width (52) of the support profile (30) that the support profile (30) has in the area of ​​the first support leg (30.1 ) and the second support leg (30.2).

5. Scaffold girder according to one of the preceding claims, characterized in that the first support leg outer surface (39.1 ) and the second support leg outer surface (39.2), viewed in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold girder, have a support leg outer surface distance (51 ) to each other which corresponds to a side wall outer surface transverse distance (20) or a maximum side wall outer surface transverse distance (20) that a first side wall outer surface (53.1 ) of the first side wall (16.1 ) of the hollow profile (14) of the bottom chord (12) and a second side wall outer surface (53.2) of the second side wall (16.2) of the hollow profile (14) of the bottom chord (12) have to each other.

6. Scaffold support according to one of the preceding claims, characterized in that the first support leg outer surface (39.1) and the second support leg outer surface (39.2) have an outer surface transverse distance (51) or the maximum outer surface transverse distance (51) or the support leg outer surface distance (51) to each other, which is slightly smaller than an inner surface distance (54) between inner surfaces of inner walls (55.1, 55.2) of a support device resting on the first bearing edge (33.1) of the first free support leg end (32.1) of the first support leg (30.1) and / or on the second bearing edge (33.2) of the second free support leg end (32.2) of the second support leg (30.2) bearing support device in the form of an O-claw or O-claw (34) of a scaffolding component (35).

7. Scaffold girder according to one of the preceding claims, characterized in that the first side wall (16.1) of the hollow profile (14), viewed in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold girder, has a first maximum side wall thickness (57.1), and that the second side wall (16.2) of the hollow profile (14), viewed in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold girder, has a second maximum side wall thickness (57.2), and that the first free support leg end (32.1) of the first support leg (30.1) is arranged offset from the first side wall (16.1) of the hollow profile (14) by more than twice the maximum first side wall thickness (57.1) of the first side wall (16.1) towards the longitudinal center plane (31) of the support profile (30). and that the second free support leg end (32.2) of the second support leg (30.2) is opposite the second side wall (16.2) of the hollow profile (14) is arranged offset by more than twice the maximum second side wall thickness (57.2) of the second side wall (16.2) towards the longitudinal center plane (31) of the support profile (30).

8. Scaffold girder according to one of the preceding claims, characterized in that the first support leg part (37.1 ) of the first support leg (30.1 ) has a first lateral outer bearing surface (58.1 ) for supporting a support device, which is concave in a cross-section (22) viewed perpendicular to the longitudinal axis (13) of the scaffold girder, and that the second support leg part (37.2) of the second support leg (30.2) has a second lateral outer bearing surface (58.2) for supporting a support device, which is concave in a cross-section (22) viewed perpendicular to the longitudinal axis (13) of the scaffold girder.

9. Scaffold support according to claim 8, characterized in that the first lateral support outer surface (58.1) is bounded by a first outer radius (59.1) in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold support and that the second lateral support outer surface (58.2) is bounded by a second outer radius (59.2) in a cross-section (22) perpendicular to the longitudinal axis (13) of the scaffold support.

10. Scaffold support according to one of the preceding claims, characterized in that the first support leg (30.1 ) has on its first support leg outer side pointing away from the second support leg (30.2) (38.1) has a first step or a first console (60.1) which has a first support leg bearing surface (40.1) extending away from the upper transverse wall (17) and from the first groove-interlocking web (47.1) for supporting a support device, and that the second support leg (30.2) has on its second support leg outer side (38.2) extending away from the first support leg (30.1) a second step or a second console (60.2) which has a second support leg bearing surface (40.1) extending away from the upper transverse wall (17) and from the second groove-interlocking web (47.2) for supporting a support device.

11. Scaffold support according to claim 10, characterized in that the first step or the first console (60.1 ) of the first support leg (30.1 ) is bounded by the first support leg outer surface (39.1 ) of the first support leg part (37.1 ) and that the second step or the second console (60.2) is bounded by the second support leg outer surface (39.2) of the second support leg part (37.2).

12. Scaffold support according to one of the preceding claims, characterized in that the first support leg (30.1) is located in a cross-section (22) perpendicular to the longitudinal axis (31) of the scaffold support. its first support leg outer surface (38.1) has a first support leg recess (65.1) for attaching an anti-lift device (67.1), in particular a caster (41.1) or a caster unit (42.1), and / or that the second support leg (30.2), viewed in a cross-section (22) perpendicular to the scaffold girder longitudinal axis (13), has on its second support leg outer surface (38.2) a second support leg recess (65.2) for attaching an anti-lift device (67.1), in particular a caster (41.1) or a caster unit (42.1).

13. Scaffold beam according to one of the preceding claims, characterized in that the first bearing edge (33.1 ) of the free first support leg end (32.1 ) of the first support leg (30.1 ) has a substantially planar first horizontal bearing surface (56.1 ) extending along the longitudinal axis (13) of the scaffold beam for supporting a support device, and that the second bearing edge (33.2) of the free second support leg end (32.2) of the second support leg (30.2) has a substantially planar second horizontal bearing surface (56.2) extending along the longitudinal axis (13) of the scaffold beam for supporting a support device.

14. Scaffold support according to claim 13, characterized in that the first horizontal support surface (56.1 ) and the second horizontal support surface (56.2) are arranged in a common horizontal plane (66).

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