Scaffold cross-bar and stack arrangement of at least two scaffold cross-bars

Abstract

A scaffold cross-bar of metal with a round-tube carrier profile of steel includes a round tube and has an outside diameter, and a U-shaped reinforcing profile of steel sheet. The U-shaped reinforcing profile has a base profile and two parallel profile legs which extend away from the base profile in the same direction at a transverse spacing from one another. Each profile leg has at least one opening for fastening and/or securing scaffold components on the scaffold cross-bar. The transverse spacing of the profile legs is smaller than 0.6 times the outside diameter of the round-tube carrier profile.

1 . Scaffolding bar of metal with an elongate rod-shaped round-tube girder profile member ( 21 ) of steel and an elongate U reinforcing profile member ( 22 ) of sheet steel, with the following features:
 the round-tube girder profile member ( 21 )   extends in the direction of a first longitudinal axis ( 23 ) in a first longitudinal direction ( 24 ),   has, as considered in the first longitudinal direction ( 24 ), a girder profile member length ( 26 ) and a girder profile member longitudinal center ( 24 ),   has an outer diameter ( 28 ) substantially constant over its girder profile member length ( 26 ),   has, as considered in an installed setting ( 30 ) of the scaffolding bar ( 20 ), an upper support edge ( 31 ) for support and/or suspension of a scaffolding covering ( 39 ) or a plurality of scaffolding coverings ( 39 ) and   comprises two girder profile member ends ( 25 . 1 ,  25 . 2 ) facing away from one another in opposite directions in the first longitudinal direction ( 24 );   either   a respective separate connecting head ( 32 ) of metal for detachable fastening of the scaffolding bar ( 20 ) in the installed setting ( 30 ) to a fastening element ( 34 ), which is provided with at least one passage ( 33 . 1 ,  33 . 2 ), of a scaffolding element ( 36 ) by means of a connecting wedge ( 35 ) insertable through the passage ( 33 . 1 ,  33 . 2 ) is fixedly welded to each girder profile member end ( 25 . 1 ,  25 . 2 ) of the girder profile member ends ( 25 . 1 ,  25 . 2 )   or   a respective hook-shaped suspension claw or suspension catch of metal, which is downwardly open as considered in each instance in the installed setting, for detachable support and/or suspension of the scaffolding bar in the installed setting on and/or at suspension components is fixedly welded to each girder profile end of the girder profile ends;   the U reinforcing profile member ( 22 )   extends away from the round-tube girder profile member ( 21 ) to underneath the round-tube girder profile member ( 21 ) in the installed setting,   extends in the direction of a second longitudinal axis ( 43 ) in a second longitudinal direction ( 44 ) parallel to the round-tube girder profile member ( 21 ) and/or parallel to the first longitudinal axis ( 23 ) thereof—with bridging-over of the girder-profile member longitudinal center ( 27 )—along the round-tube girder profile member ( 21 ) continuously over a reinforcing profile member length ( 45 ) corresponding with at least half the girder profile member length ( 26 ) of the round-tube girder profile member ( 21 ),   has two reinforcing profile member ends ( 47 . 1 ,  47 . 2 ) facing away from one another in opposite directions in the second longitudinal direction ( 44 ),   has, as considered in a cross-section extending perpendicularly to the second longitudinal axis ( 43 ), a U-shaped cross-section ( 48 ),   is formed with a base profile ( 49 ), which extends in the second longitudinal direction ( 44 ) and from which two lateral profile limbs ( 50 . 1 ,  50 . 2 ) extending in the second longitudinal direction ( 44 ) extend away in the same direction upwardly as considered in the installed setting ( 30 ) and substantially parallel to one another at a transverse spacing ( 52 ) and in the direction of a profile limb axis ( 51 ), which is vertical in the installed setting ( 30 ), and have fastening ends ( 55 . 1 ,  55 . 2 ) fixedly welded to an outer wall of the round-tube girder profile member ( 21 ) and   has a reinforcing profile member width ( 52 ) corresponding with the transverse spacing ( 52 ) and a reinforcing profile member height ( 56 ), which corresponds with the spacing ( 56 ) of the fastening ends ( 55 . 1 ,  55 . 2 ) from the base profile ( 49 ) and which is greater than the reinforcing profile member width ( 52 ) and than the outer diameter ( 28 ) of the round-tube girder profile member ( 21 );   
       a first profile limb ( 50 . 1 ) of the two lateral profile limbs ( 50 . 1 ,  50 . 2 ) is provided with a first passage ( 60 . 1 ) for fastening and/or securing scaffolding components;
 the first passage ( 60 . 1 ) 
 is arranged at a first longitudinal spacing ( 61 . 1 ) from a first reinforcing profile member end ( 47 . 1 ) of the two reinforcing profile member ends ( 47 . 1 ,  47 . 2 ) of the U reinforcing profile member ( 22 ) and at a second longitudinal spacing from a second reinforcing profile member end ( 47 . 2 ) of the two reinforcing profile member ends ( 47 . 1 ,  47 . 2 ) of the U reinforcing profile member ( 22 ), 
 has a first passage length ( 64 ) as considered in the second longitudinal direction ( 44 ) and 
 has a first passage height ( 63 ) which is smaller than the reinforcing profile member height ( 56 ); 
 
       a second profile limb ( 50 . 2 ) of the two lateral profile limbs ( 50 . 1 ,  50 . 2 ) is provided with a second passage ( 60 . 2 ) for fastening and/or securing scaffolding components;
 the second passage ( 60 . 2 ) 
 is arranged at a third longitudinal spacing from the first reinforcing profile member end ( 47 . 1 ) of the U reinforcing profile member ( 22 ) and at a fourth longitudinal spacing from the second reinforcing profile member end ( 47 . 2 ), 
 has a second passage length ( 64 ) as considered in the second longitudinal direction ( 44 ) and 
 has a second passage height ( 63 ) smaller than the reinforcing profile member height ( 56 ); 
 
       the transverse spacing ( 52 ), which corresponds with the reinforcing profile member width ( 52 ) of the U reinforcing profile member ( 22 ), of the two lateral profile limbs ( 50 . 1 ,  50 . 2 ) extending substantially parallel to one another is less than 0.6 times the outer diameter ( 28 ) of the round-tube girder profile member ( 21 ). 
     
     
         2 . Scaffolding bar according to  claim 1 , wherein the transverse spacing ( 52 ), which corresponds with the reinforcing profile member width ( 52 ) of the U reinforcing profile member ( 22 ), of the two lateral profile limbs ( 50 . 1 ,  50 . 2 ) extending substantially parallel to one another is less than 0.5 or 0.45 times the outer diameter ( 28 ) of the round-tube girder profile member ( 21 ). 
     
     
         3 . Scaffolding bar according to  claim 1 , wherein the first passage ( 60 . 1 ) of the first profile limb ( 50 . 2 ) and the second passage ( 60 . 2 ) of the second profile limb ( 50 . 2 ) are arranged at substantially the same height with respect to the U reinforcing profile member ( 22 ). 
     
     
         4 . Scaffolding bar according to  claim 1 , wherein the first passage ( 60 . 1 ) of the first profile limb ( 50 . 1 ) and the second passage ( 60 . 2 ) of the second profile limb ( 50 . 2 ) are bounded by the outer wall of the round-tube girder profile member ( 21 ). 
     
     
         5 . Scaffolding bar according to  claim 1 , wherein the first passage ( 60 . 1 ) of the first profile limb ( 50 . 1 ) as considered in a viewing direction perpendicular to a plane ( 65 ) containing the first longitudinal axis ( 23 ) and the second longitudinal axis ( 43 ) either at least partly overlaps the second passage ( 60 . 2 ) of the second profile limb ( 50 . 2 ) or is substantially aligned with the second passage ( 60 . 2 ). 
     
     
         6 . Scaffolding bar according to  claim 1 , wherein the first profile limb ( 50 . 1 ) of the U reinforcing profile member ( 22 ) has in the region of the first passage ( 60 . 1 ) a first profile limb height ( 66 ) which is greater than half the reinforcing profile member height ( 56 ) and wherein the second profile limb ( 50 . 2 ) of the U reinforcing profile member ( 22 ) has in the region of the second passage ( 60 . 2 ) a second profile limb height ( 66 ) which is greater than half the reinforcing profile member height ( 56 ). 
     
     
         7 . Scaffolding bar according to  claim 1 , wherein the first passage height ( 63 ) of the first passage ( 60 . 1 ) of the first profile limb ( 50 . 1 ) and the second passage height ( 63 ) of the second passage ( 60 . 2 ) of the second profile limb ( 50 . 2 ) are each smaller than half the reinforcing profile member height ( 56 ). 
     
     
         8 . Scaffolding bar according to  claim 1 , wherein the first profile limb height ( 66 ) of the first profile limb ( 50 . 1 ) of the U reinforcing profile member ( 22 ) is greater than 1.0, 1.2 or 1.4 times the first passage height ( 63 ), of the first passage ( 60 . 1 ) of the first profile limb ( 50 . 1 ) and/or wherein the second profile limb height ( 66 ) of the second profile limb ( 50 . 2 ) of the U reinforcing profile member ( 22 ) is greater than 1.0, 1.2 or 1.4 times the second passage height ( 63 ) of the second passage ( 60 . 2 ) of the second profile limb ( 50 . 2 ). 
     
     
         9 . Scaffolding bar according to  claim 1 , comprising the following further features:
 the first profile limb ( 50 . 1 ) of the U reinforcing profile member ( 22 ) is provided with at least one third passage ( 60 . 3 ) for fastening and/or securing scaffolding components,   the third passage ( 60 . 3 )   is arranged at a first passage longitudinal spacing ( 62 . 1 ) from the first passage ( 60 . 1 ) as considered in the second longitudinal direction ( 44 ),   is arranged at a fifth longitudinal spacing from the first reinforcing profile member end ( 47 . 1 ) and at a sixth longitudinal spacing ( 61 . 6 ) from the second reinforcing profile member end ( 47 . 2 ),   has a third passage length as considered in the second longitudinal direction ( 44 ) and   has a third passage height ( 63 ) smaller than the reinforcing profile member height ( 56 );   
       the second profile limb ( 50 . 2 ) of the U reinforcing profile member ( 22 ) is provided with at least one fourth passage for fastening and/or securing scaffolding components;
 the fourth passage 
 is arranged at a second passage longitudinal spacing from the second passage ( 60 . 2 ) as considered in the second length direction ( 44 ), 
 is arranged at a seventh longitudinal spacing from the first reinforcing profile member end ( 47 . 1 ) of the U reinforcing profile member ( 22 ) and at an eighth longitudinal spacing from the second reinforcing profile member end ( 47 . 2 ) of the U reinforcing profile member ( 22 ), 
 has a fourth passage length as considered in the second longitudinal direction ( 44 ) and 
 has a fourth passage height ( 63 ) smaller than the reinforcing profile member height ( 56 ). 
 
     
     
         10 . Scaffolding bar according to  claim 1 , wherein each passage ( 60 . 1 ,  60 . 2 ,  60 . 3 ) as considered in the second longitudinal direction ( 44 ) is constructed to be longitudinal or elongate and/or is formed to be rectangular. 
     
     
         11 . Scaffolding bar according to  claim 1 , wherein the two lateral profile limbs ( 50 . 1 ,  50 . 2 ), which extend substantially parallel to one another, of the U reinforcing profile member ( 22 ) are arranged symmetrically with respect to a longitudinal plane ( 65 ) of symmetry containing the first longitudinal axis ( 23 ) and the second longitudinal axis ( 43 ). 
     
     
         12 . Scaffolding bar according to  claim 1 , wherein the U reinforcing profile member ( 22 ) is formed symmetrically with respect to a or the longitudinal plane ( 65 ) of symmetry containing the first longitudinal axis ( 23 ) and the second longitudinal axis ( 43 ). 
     
     
         13 . Scaffolding bar according to  claim 1 , wherein the U reinforcing profile member ( 22 ) is produced by flanging, bending over and/or profiling a plate-shaped or strip-shaped steel sheet on a rolling train and/or wherein the base profile ( 49 ) of the U reinforcing profile member ( 22 ) is curved outwardly away from the round-tube girder profile member ( 21 ) and has a semi-circular cross-section as considered in a cross-section perpendicular to the second longitudinal axis ( 43 ). 
     
     
         14 . Stack arrangement of at least two scaffolding bars comprising a first scaffolding bar ( 20 ;  20 . 1 ) according to  claim 1  and at least one second scaffolding bar ( 20 ;  20 . 1 ), wherein the round-tube girder profile member ( 21 ) of the second scaffolding bar ( 20 . 2 ) bears against or rests on one profile limb ( 50 . 1 ) of the two substantially parallel profile limbs ( 50 . 1 ,  50 . 2 ) of the U reinforcing profile member ( 22 ) of the first scaffolding bar ( 20 . 1 ) and wherein the U reinforcing profile member ( 22 ) of the second scaffolding bar ( 20 . 2 ) bears or rests by one profile limb ( 50 . 1 ) of its two substantially parallel profile limbs ( 50 . 1 ,  50 . 2 ) against or on the round-tube girder profile member ( 21 ) of the first scaffolding bar ( 20 . 1 ). 
     
     
         15 . Stack arrangement according to  claim 14 , wherein the first scaffolding bar ( 20 ;  20 . 1 ) and the second scaffolding bar ( 20 ;  20 . 1 ) are formed to be the same.