Reinforced girder

Abstract

A reinforced girder including a first C-shaped member formed of sheet metal. A second C-shaped member, formed of sheet metal, is welded to the first C-shaped member to form a rectangular box. A first pair of metallic stringers is welded in a spaced-apart relationship within the first C-shaped member. The first pair of metallic stringers extends the length of the first C-shaped member. A second pair of metallic stringers is welded in a spaced-apart relationship within the second C-shaped member and extends the length of the second C-shaped member. A number of first, metallic, transverse connectors are welded in a spaced-apart relationship within the first C-shaped member between the first pair of metallic stringers. The first, metallic transverse connectors are oriented parallel to one another and at right angles to the first pair of metallic stringers. A number of second, metallic, transverse connectors are welded in a spaced-apart relationship within the second C-shaped member between the second pair of metallic stringers. The second, metallic transverse connectors are oriented parallel to one another and at right angles to the second pair of metallic stringers.

I claim: 
     
         1 . A reinforced girder, comprising:
 a first C-shaped member being formed of sheet metal;   a second C-shaped member being formed of sheet metal and being welded to said first C-shaped member so as to form a rectangular box;   a first pair of metallic stringers being welded in a spaced-apart relationship within said first C-shaped member, said first pair of metallic stringers extending the length of said first C-shaped member;   a second pair of metallic stringers being welded in a spaced-apart relationship within said second C-shaped member, said second pair of stringers extending the length of said second C-shaped member;   a plurality of first, metallic, transverse connectors being welded in a spaced-apart relationship within said first C-shaped member between said first pair of metallic stringers, said first, metallic transverse connectors being oriented parallel to one another and at right angles to said first pair of metallic stringers; and,   a plurality of second, metallic, transverse connectors being welded in a spaced-apart relationship within said second C-shaped member between said second pair of metallic stringers, said second, metallic transverse connectors being oriented parallel to one another and at right angles to said second pair of metallic stringers.   
     
     
         2 . A reinforced girder, comprising:
 a first C-shaped member including:
 a first intermediate wall; 
 a first pair of end walls being affixed to said first intermediate wall and extending at right angles therefrom; and, 
 a first pair of flanges being affixed to said first pair of end walls and extending at right angles therefrom in a common plane parallel to said first intermediate wall; 
   a first pair of metallic stringers being respectively welded within said first C-shaped member at the junctions of said first pair of end walls with said first intermediate wall;   a plurality of first, metallic, transverse connectors being welded in a spaced-apart relationship to said first intermediate wall between said first pair of metallic stringers, said first, metallic transverse connectors being oriented parallel to one another and at right angles to said first pair of metallic stringers;   a second C-shaped member being welded to said first C-shaped member so as to form a box, said second C-shaped member including:
 a second intermediate wall; 
 a second pair of end walls being affixed to said second intermediate wall and extending at right angles therefrom; and, 
 a second pair of flanges being affixed to said second pair of end walls and extending at right angles therefrom in a common plane parallel to said second intermediate wall, said second pair of flanges being in abutment with said first pair of flanges; 
   a second pair of metallic stringers being respectively welded within said second C-shaped member at the junctions of said second pair of end walls with said second intermediate wall; and,   a plurality of second, metallic, transverse connectors being welded in a spaced-apart relationship to said second intermediate wall between said second pair of metallic stringers, said second, metallic transverse connectors being oriented parallel to one another and at right angles to said second pair of metallic stringers.   
     
     
         3 . A reinforced girder, comprising:
 a first C-shaped member being formed of sheet metal;   a second C-shaped member being formed of sheet metal and being welded to said first C-shaped member so as to form a rectangular box;   a first pair of metallic stringers being welded in a spaced-apart relationship within said first C-shaped member, said first pair of metallic stringers extending the length of said first C-shaped member;   a second pair of metallic stringers being welded in a spaced-apart relationship within said second C-shaped member, said second pair of stringers extending the length of said second C-shaped member;   a first, metallic, transverse connector being welded at the midpoint of said first C-shaped member between said first pair of metallic stringers, said first, metallic transverse connector being oriented at right angles to said first pair of metallic stringers; and,   a second, metallic, transverse connector being welded at the midpoint of said second C-shaped member between said second pair of metallic stringers, said second, metallic transverse connector being oriented at right angles to said second pair of metallic stringers.