Joining system for two building elements

Abstract

The present invention relates to a joining system for securing a first building element ( 1 ) relative to a second build element ( 2 ), where a first part ( 10 ) comprises a box element ( 100 ) adapted to be cast in one of the building elements ( 1, 2 ). According to the invention a lifting element ( 110 ) is secured to the box element ( 100 ), which lifting element ( 110 ) comprises an attachment portion ( 111 ) adapted for cooperation with lifting equipment, which attachment portion ( 111 ) during an installation phase of the joining system is located relatively outside an outer side ( 3 ) of one of the building elements ( 1, 2 ) comprising the box element ( 100 ).

1 . A joining system for securing a first building element ( 1 ) relative to a second building element ( 2 ), where a first part ( 10 ) of the joining system is adapted for mounting on one building element ( 1 ) and a second part ( 20 ) of the joining system is adapted for mounting on the second building element ( 2 ), which first part ( 10 ) comprises a box element ( 100 ) adapted to be cast in one of the building elements ( 1 , 2 ),
 characterised in that a lifting element ( 110 ) is secured to the box element ( 100 ), which lifting element ( 110 ) comprises an attachment portion ( 111 ) adapted for cooperation with lifting equipment, which attachment portion ( 111 ) during an installation phase of the joining system is located relatively outside an outer side ( 3 ) of one of the building elements ( 1 ,  2 ) comprising the box element ( 100 ).   
   
   
       2 . A joining system according to  claim 1 ,
 characterised in that the attachment portion ( 111 ) comprises devices ( 114 ,  115 ) for rapid coupling with a lifting equipment.   
   
   
       3 . A joining system according to  claim 1 ,
 characterised in that the lifting element ( 110 ) comprises a fixing plate ( 112 ), and a connecting rod ( 113 ) connected to the outer attachment portion ( 111 ), where the fixing plate ( 112 ) is secured to the box element ( 100 ) and is connected to the connecting rod ( 113 ).   
   
   
       4 . A joining system according to  claim 3 ,
 characterised in that the fixing plate ( 112 ) forms a sleeve element, which is arranged round the box element ( 100 ).   
   
   
       5 . A joining system according to  claim 1 ,
 characterised in that in a utilisation condition, the attachment portion ( 111 ) is located in a portion ( 4 ) of the building element ( 1 ) to which it is mounted, which portion is recessed relative to the surface ( 3 ).   
   
   
       6 . A joining system according to  claim 5 ,
 characterised in that the recessed portion ( 4 ) comprises devices ( 5 ) for guiding lifting equipment into engagement with the attachment portion ( 111 ).   
   
   
       7 . A joining system according to  claim 5 ,
 characterised in that the attachment portion ( 111 ) is mounted within a plane ( 30 ) aligned with a main surface of the outer side ( 3 ) wherein it is located, with the result that the attachment portion ( 111 ) does not protrude beyond the building element's outer circumference.   
   
   
       8 . A joining system according to one of the above-mentioned claims, characterised in that the box element ( 100 ) is a substantially hollow element with an open end ( 108 ) aligned with a side ( 7 ) of the building element ( 1 ) which after mounting will face the second building element ( 2 ), where a bridge element ( 120 ) is mounted movably internally in the box element ( 100 ) from a substantially retracted position where it is located inside the box element ( 100 ) to an extended position where a portion of the bridge element is located outside the box element ( 100 ) and can go into engagement with a receiving opening ( 21 ) in the second building element ( 2 ), thereby interconnecting the building elements ( 1 , 2 ). 
   
   
       9 . A joining system according to one of the above-mentioned claims, characterised in that the building element ( 1 ) comprising the box element ( 100 ) and the lifting element ( 110 ) is a cast building element ( 1 ). 
   
   
       10 . A method for joining two building elements ( 1 ,  2 ), whereof at least one building element ( 1 ) is a cast element,
 characterised in that the desired number of box elements ( 100 ) is provided, to which the desired number of lifting elements ( 110 ) is attached, the box elements ( 100 ) with the secured lifting elements ( 110 ) are arranged in a casting mould with the result that after casting the attachment portion ( 111 ) of the lifting element ( 110 ) will be located outside an outer surface ( 3 ) of the building element ( 1 ), grouting compound is added to the casting mould and the building element ( 1 ) is set and brought to the user site, the bridge element ( 120 ) is placed in a retracted position inside the box element ( 100 ), lifting equipment is secured to the attachment portion ( 111 ) of the lifting element ( 110 ) and the building element ( 1 ) is lifted up to its position and joined by guiding the bridge element ( 120 ) to an extended position in engagement with the second building element ( 2 ), whereupon the lifting equipment is released from the first building element ( 1 ).   
   
   
       11 . A method according to  claim 10 ,
 characterised in that the attachment portion ( 111 ) is located in a portion ( 4 ) which is recessed relative to the rest of the outer circumference of the building element, which recessed portion ( 4 ) is grouted after joining of the building elements ( 1 ,  2 ), thereby forming a smooth outer surface of the building element ( 1 ).