Both dogs are ways of forcing plates into alignment. The plates are shown here in black. The top is more suited for thinner plate and for use by a helper. The bottom dog can be used on heavier plate, as well as thin. This type can supposedly exert up to fifty tons pressure. The faces of the wedges should be cut or ground to ensure a smooth, even surface. The wedge should also be driven into the dog from the welded side for it to work well.

· A..........Pipe w/ 2 tabs plate welded on end
· B..........Short weld

· C..........Short weld
· D..........Dog
· E..........Wedge-10" L x 2" H x 3/4" (+)thick
· F..........Cut out corner of dog - 2" W x 1" H
· G..........Dog - 3/8"(+) x 3" H x 5" L