Plug welded joints are used-

plug weld and 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

Students also viewed Plug welds and slot welds are identified by the same symbol, except that the plug weld symbol has a diameter symbol placed on its right Notes of CE-6thsem, Structural Design-II Slot Weld ,plug Weld

dewisport slot In welded construction for buildings approximately 80% of the welds are fillet welds and 15% are butt welds The remaining 5% are plug, slot and spot welds  plug weld is its diameter whereas the size of a slot is its width They may be completely filled or filled to a depth specified within the weld symbol See