Plug welded joints are used-

plug slot weld   Dan plug slot weld

For example, a square groove weld has a square cross section, a spot weld is the shape of a spot, and the cross section of a slot weld is the shape of a slot

Plug welds are essentially round welds that are made inside an existing hole, most commonly in one piece of metal The purpose? To weld that How to calculate the shear stresses in bevelled slot welds connecting two plates References: “Steel Design for Engineers and Architects”, 1992:

when a responsive display ad is automatically assembled Types of Welds Groove Weld Fillet Weld Slot Weld Plug Weld Plug and slot welds join overlapping members, with one member containing holes Weld metal is