Heavy duty girder

Abstract

A heavy duty girder, having a plurality of outer sides and a mounting channel disposed on each of the outer sides and including a bottom surface and a pair of side surfaces. Each of the side surfaces has one end extending to the outer side by one or two bending portions including a first bending portion coupled to the outer side and a second bending portion coupled to the side surface, and the other end extending to the bottom surface by a third bending portion. The bending direction of the second bending portion is opposite to or perpendicular to the bending direction of the first bending portion. The second bending portion abuts against an inner wall of the hollow body.

1 . A heavy duty girder with hollow body, comprising:
 a plurality of outer sides, and   a mounting channel disposed on each of the outer sides and including a bottom surface and a pair of side surfaces,   wherein each of the side surfaces has one end extending to the outer side by one or two bending portions including a first bending portion coupled to the outer side and a second bending portion coupled to the side surface, and the other end extending to the bottom surface by a third bending portion;   wherein the first bending portion is formed with an anti-skidding track at a position facing the bottom surface, and the hollow body is formed integrally by sheet metal bending.   
     
     
         2 . The heavy duty girder of  claim 1 , wherein the bending direction of the first bending portion is opposite to or perpendicular to the bending direction of the second bending portion. 
     
     
         3 . The heavy duty girder of  claim 1 , wherein the second bending portion abuts against an inner wall of the hollow body. 
     
     
         4 . The heavy duty girder of  claim 2 , wherein the second bending portion abuts against an inner wall of the hollow body. 
     
     
         5 . The heavy duty girder of  claim 1 , wherein a first channel width is formed between bending insides of each pair of the first bending portions, a second channel width is formed between each pair of the side surfaces, and a channel depth is formed between the bottom surface and a corresponding outer side. 
     
     
         6 . The heavy duty girder of  claim 5 , wherein the first channel width, the second channel width and the channel depth are configured for allowing accommodation of a bolt assembly, and access of a mounting tool to access to the mounting channel. 
     
     
         7 . (canceled) 
     
     
         8 . The heavy duty girder of  claim 1 , wherein the anti-skidding track is toothed track. 
     
     
         9 . The heavy duty girder of  claim 1 , wherein the heavy duty girder comprises through holes passing through two opposing bottom surfaces. 
     
     
         10 . (canceled) 
     
     
         11 . (canceled)