Yielding Post of Thin Sheet Metal and Method of Arranging Street Lighting

Abstract

Street lighting is positioned with lamp posts of sheet metal that have a round or polygonal cross-section and one or more longitudinal welded joints ( 17 - 20; 24 ). Posts are used that have one longitudinal welded butt joint with a weld that covers only a part of the sheet metal thickness and the posts are positioned so that this joint is directed towards the traffic.

1 . Yielding post of thin sheet metal with a polygonal or round cross-section with at least one longitudinal welded butt joint ( 17 - 20 , 24 ), wherein the weld ( 23 ) has a smaller thickness across the sheet metal than the sheet metal thickness. 
     
     
         2 . Post according to  claim 1 , wherein the weld ( 23 ) has a thickness of less than ¾ of the sheet metal thickness. 
     
     
         3 . Post according to  claim 1 , wherein the edges ( 21 , 22 ) facing the weld are bevelled. 
     
     
         4 . Post according to  claim 1 , wherein the weld ( 23 ) is a laser weld. 
     
     
         5 . Post according to  claim 1 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic. 
     
     
         6 . Post according to  claim 5 , wherein the lighting post is roll formed and has only one longitudinal joint ( 24 ). 
     
     
         7 . Method of arranging street lighting with lamp posts of sheet metal that have a round or polygonal cross-section and one or more longitudinal welded joints ( 17 - 20 ;  24 ), wherein posts are used that have one longitudinal welded butt joint ( 17 - 20 ;  24 ) with a weld ( 23 ) that has a smaller thickness across the sheet metal than the sheet metal thickness and the posts are positioned so that this joint is directed towards the traffic. 
     
     
         8 . Method according to  claim 7 , wherein posts are used with a laser welded joint with a weld thickness of less than ¾ of the sheet metal thickness. 
     
     
         9 . Method according to  claim 8 , wherein posts are used that are roll formed in one piece so that they have only one longitudinal joint ( 24 ). 
     
     
         10 . Post according to  claim 2 , wherein the edges ( 21 , 22 ) facing the weld are bevelled. 
     
     
         11 . Post according to  claim 10 , wherein the weld ( 23 ) is a laser weld. 
     
     
         12 . Post according to  claim 3 , wherein the weld ( 23 ) is a laser weld. 
     
     
         13 . Post according to  claim 2 , wherein the weld ( 23 ) is a laser weld. 
     
     
         14 . Post according to  claim 13 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic. 
     
     
         15 . Post according to  claim 12 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic. 
     
     
         16 . Post according to  claim 11 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic. 
     
     
         17 . Post according to  claim 10 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic. 
     
     
         18 . Post according to  claim 4 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic. 
     
     
         19 . Post according to  claim 3 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic. 
     
     
         20 . Post according to  claim 2 , wherein it is a lighting post by the road and has a longitudinal welded joint ( 17 - 20 ,  24 ) directed towards the traffic.