| 摘要 |
<p>A method and apparatus for producing single plane ladder-type rack strip material (67) in which wire cross bar elements (52) are Tee-welded to the inside surface portions of opposed, parallel side elements (33, 34) formed of similar wire material. During welding, the cross bar element (52) is contacted at its center by an electrode (54) of a first polarity and placed between the side elements (33, 34), which are contacted on their outer surfaces by two electrodes (44, 45) of a second polarity. The welding current flows in substantially equal amounts from the first electrode (54) through the weld interfaces to the second electrodes (44, 45). The planar rack strip material (67) is formed into a variety of mdular components to be used in rack (100, 110) and shelving structures (86) utilizing mounting blocks (83, 104) and connecting blocks (139).</p> |
