plug weld reinforcement

plug or slot weld   Dan plug or slot weld

To enable thicker plate to be joined by 'spot welding' a circular or elongated hole may be machined through the top plate, enabling either a plug or a slot weld

The short answer is the larger the plug the easier it is to weld If you are not given specifications then I would use a 1 diameter hole through the 12 sheet Plug welds and slot welds are used join overlapping members, one of which has holes in it Weld metal is

area slot auto MIG Welding Basics: Plug welding is a technique you can utilize when working with ornamental Plug welds are also a good alternative for when a spot welder is not available and, if completed properly, these joins can be stronger than a spot weld To