| CPC B23K 37/0443 (2013.01) [B23K 37/0533 (2013.01)] | 20 Claims |

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1. A welding jig for holding a horizontal member relative to a vertical member, said jig comprising a base having a clamp able to clamp the base to the vertical member and constituting a first, coarse, vertical adjustment mechanism, a frame interconnected to said base by a first threaded member constituting a second, fine, vertical adjustment mechanism; a pair of supports slidingly mounted on said frame and movable between predetermined positions to constitute a first, coarse, horizontal adjustment mechanism;
and first and second vise parts each threadably mounted on a corresponding one of said supports and movable towards and away from each other to constitute a vise mechanism, said vise mechanism clamping said horizontal member and having a centre which is horizontally adjustable relative to said vertical member by adjustment of the threaded engagement between said supports and said vise parts.
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